From b115fb94d27bfbb83d6fdbe7119b4fc5e15f948a Mon Sep 17 00:00:00 2001
From: Ludy87 <Ludy87@users.noreply.github.com>
Date: Wed, 6 Aug 2025 18:52:56 +0200
Subject: [PATCH] add Maximum DPI setting

---
 .../common/model/ApplicationProperties.java       |  1 +
 .../stirling/software/common/util/PdfUtils.java   | 12 +++++++++---
 .../controller/web/ConverterWebController.java    |  9 +++++++++
 .../src/main/resources/messages_ar_AR.properties  |  1 +
 .../src/main/resources/messages_az_AZ.properties  |  1 +
 .../src/main/resources/messages_bg_BG.properties  |  1 +
 .../src/main/resources/messages_bo_CN.properties  |  1 +
 .../src/main/resources/messages_ca_CA.properties  |  1 +
 .../src/main/resources/messages_cs_CZ.properties  |  1 +
 .../src/main/resources/messages_da_DK.properties  |  1 +
 .../src/main/resources/messages_de_DE.properties  |  1 +
 .../src/main/resources/messages_el_GR.properties  |  1 +
 .../src/main/resources/messages_en_GB.properties  |  1 +
 .../src/main/resources/messages_en_US.properties  |  1 +
 .../src/main/resources/messages_es_ES.properties  |  1 +
 .../src/main/resources/messages_eu_ES.properties  |  1 +
 .../src/main/resources/messages_fa_IR.properties  |  1 +
 .../src/main/resources/messages_fr_FR.properties  |  1 +
 .../src/main/resources/messages_ga_IE.properties  |  1 +
 .../src/main/resources/messages_hi_IN.properties  |  1 +
 .../src/main/resources/messages_hr_HR.properties  |  1 +
 .../src/main/resources/messages_hu_HU.properties  |  1 +
 .../src/main/resources/messages_id_ID.properties  |  1 +
 .../src/main/resources/messages_it_IT.properties  |  1 +
 .../src/main/resources/messages_ja_JP.properties  |  1 +
 .../src/main/resources/messages_ko_KR.properties  |  1 +
 .../src/main/resources/messages_ml_IN.properties  |  1 +
 .../src/main/resources/messages_nl_NL.properties  |  1 +
 .../src/main/resources/messages_no_NB.properties  |  1 +
 .../src/main/resources/messages_pl_PL.properties  |  1 +
 .../src/main/resources/messages_pt_BR.properties  |  1 +
 .../src/main/resources/messages_pt_PT.properties  |  1 +
 .../src/main/resources/messages_ro_RO.properties  |  1 +
 .../src/main/resources/messages_ru_RU.properties  |  1 +
 .../src/main/resources/messages_sk_SK.properties  |  1 +
 .../src/main/resources/messages_sl_SI.properties  |  1 +
 .../main/resources/messages_sr_LATN_RS.properties |  1 +
 .../src/main/resources/messages_sv_SE.properties  |  1 +
 .../src/main/resources/messages_th_TH.properties  |  1 +
 .../src/main/resources/messages_tr_TR.properties  |  1 +
 .../src/main/resources/messages_uk_UA.properties  |  1 +
 .../src/main/resources/messages_vi_VN.properties  |  1 +
 .../src/main/resources/messages_zh_CN.properties  |  1 +
 .../src/main/resources/messages_zh_TW.properties  |  1 +
 app/core/src/main/resources/settings.yml.template |  1 +
 .../resources/templates/convert/pdf-to-img.html   | 15 +++++++++++++++
 devGuide/DeveloperGuide.md                        |  1 +
 47 files changed, 77 insertions(+), 3 deletions(-)

diff --git a/app/common/src/main/java/stirling/software/common/model/ApplicationProperties.java b/app/common/src/main/java/stirling/software/common/model/ApplicationProperties.java
index 802a55831..fb93ef345 100644
--- a/app/common/src/main/java/stirling/software/common/model/ApplicationProperties.java
+++ b/app/common/src/main/java/stirling/software/common/model/ApplicationProperties.java
@@ -311,6 +311,7 @@ public class ApplicationProperties {
         private Boolean enableAnalytics;
         private Datasource datasource;
         private Boolean disableSanitize;
+        private int maxDPI;
         private Boolean enableUrlToPDF;
         private Html html = new Html();
         private CustomPaths customPaths = new CustomPaths();
diff --git a/app/common/src/main/java/stirling/software/common/util/PdfUtils.java b/app/common/src/main/java/stirling/software/common/util/PdfUtils.java
index ec269e47d..6f4305bd3 100644
--- a/app/common/src/main/java/stirling/software/common/util/PdfUtils.java
+++ b/app/common/src/main/java/stirling/software/common/util/PdfUtils.java
@@ -35,6 +35,7 @@ import io.github.pixee.security.Filenames;
 
 import lombok.extern.slf4j.Slf4j;
 
+import stirling.software.common.model.ApplicationProperties;
 import stirling.software.common.service.CustomPDFDocumentFactory;
 
 @Slf4j
@@ -145,13 +146,18 @@ public class PdfUtils {
             throws IOException, Exception {
 
         // Validate and limit DPI to prevent excessive memory usage
-        final int MAX_SAFE_DPI = 500; // Maximum safe DPI to prevent memory issues
-        if (DPI > MAX_SAFE_DPI) {
+        int maxSafeDpi = 500; // Default maximum safe DPI
+        ApplicationProperties properties =
+                ApplicationContextProvider.getBean(ApplicationProperties.class);
+        if (properties != null && properties.getSystem() != null) {
+            maxSafeDpi = properties.getSystem().getMaxDPI();
+        }
+        if (DPI > maxSafeDpi) {
             throw ExceptionUtils.createIllegalArgumentException(
                     "error.dpiExceedsLimit",
                     "DPI value {0} exceeds maximum safe limit of {1}. High DPI values can cause memory issues and crashes. Please use a lower DPI value.",
                     DPI,
-                    MAX_SAFE_DPI);
+                    maxSafeDpi);
         }
 
         try (PDDocument document = pdfDocumentFactory.load(inputStream)) {
diff --git a/app/core/src/main/java/stirling/software/SPDF/controller/web/ConverterWebController.java b/app/core/src/main/java/stirling/software/SPDF/controller/web/ConverterWebController.java
index 34f8a8daa..1c05aaabd 100644
--- a/app/core/src/main/java/stirling/software/SPDF/controller/web/ConverterWebController.java
+++ b/app/core/src/main/java/stirling/software/SPDF/controller/web/ConverterWebController.java
@@ -8,6 +8,8 @@ import org.springframework.web.servlet.ModelAndView;
 import io.swagger.v3.oas.annotations.Hidden;
 import io.swagger.v3.oas.annotations.tags.Tag;
 
+import stirling.software.common.model.ApplicationProperties;
+import stirling.software.common.util.ApplicationContextProvider;
 import stirling.software.common.util.CheckProgramInstall;
 
 @Controller
@@ -62,6 +64,13 @@ public class ConverterWebController {
     @Hidden
     public String pdfToimgForm(Model model) {
         boolean isPython = CheckProgramInstall.isPythonAvailable();
+        ApplicationProperties properties =
+                ApplicationContextProvider.getBean(ApplicationProperties.class);
+        if (properties != null && properties.getSystem() != null) {
+            model.addAttribute("maxDPI", properties.getSystem().getMaxDPI());
+        } else {
+            model.addAttribute("maxDPI", 500); // Default value if not set
+        }
         model.addAttribute("isPython", isPython);
         model.addAttribute("currentPage", "pdf-to-img");
         return "convert/pdf-to-img";
diff --git a/app/core/src/main/resources/messages_ar_AR.properties b/app/core/src/main/resources/messages_ar_AR.properties
index 2993800ac..02296e11d 100644
--- a/app/core/src/main/resources/messages_ar_AR.properties
+++ b/app/core/src/main/resources/messages_ar_AR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=نوع اللون
 pdfToImage.color=اللون
 pdfToImage.grey=تدرج الرمادي
 pdfToImage.blackwhite=أبيض وأسود (قد يفقد البيانات!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=تحويل
 pdfToImage.info=Python غير مثبت. مطلوب لتحويل WebP.
 pdfToImage.placeholder=(مثال: 1,2,8 أو 4,7,12-16 أو 2n-1)
diff --git a/app/core/src/main/resources/messages_az_AZ.properties b/app/core/src/main/resources/messages_az_AZ.properties
index c719d7139..b13abce29 100644
--- a/app/core/src/main/resources/messages_az_AZ.properties
+++ b/app/core/src/main/resources/messages_az_AZ.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Rəng Tipi
 pdfToImage.color=Rəng
 pdfToImage.grey=Boz Tonlama
 pdfToImage.blackwhite=Qara və Ağ (Data İtə Bilər)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Çevir
 pdfToImage.info=Python Yüklü Deyil.WebP Çevirməsi Üçün Vacibdir
 pdfToImage.placeholder=(məsələn, 1,2,8 və ya 4,7,12-16 və ya 2n-1)
diff --git a/app/core/src/main/resources/messages_bg_BG.properties b/app/core/src/main/resources/messages_bg_BG.properties
index eaaeb5d95..f16484639 100644
--- a/app/core/src/main/resources/messages_bg_BG.properties
+++ b/app/core/src/main/resources/messages_bg_BG.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Тип цвят
 pdfToImage.color=Цвят
 pdfToImage.grey=Скала на сивото
 pdfToImage.blackwhite=Черно и бяло (може да загубите данни!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Преобразуване
 pdfToImage.info=Python не е инсталиран. Изисква се за конвертиране на WebP.
 pdfToImage.placeholder=(e.g. 1,2,8 or 4,7,12-16 or 2n-1)
diff --git a/app/core/src/main/resources/messages_bo_CN.properties b/app/core/src/main/resources/messages_bo_CN.properties
index d84b4a387..356735843 100644
--- a/app/core/src/main/resources/messages_bo_CN.properties
+++ b/app/core/src/main/resources/messages_bo_CN.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=ཚོས་མདོག་གི་རིགས།
 pdfToImage.color=ཚོས་མདོག
 pdfToImage.grey=སྐྱ་མདོག
 pdfToImage.blackwhite=དཀར་ནག (གནས་ཚུལ་བརླག་སྲིད།)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=བསྒྱུར་བ།
 pdfToImage.info=Python སྒྲིག་འཇུག་བྱས་མི་འདུག WebP བསྒྱུར་བར་དགོས་མཁོ་ཡིན།
 pdfToImage.placeholder=(དཔེར་ན། 1,2,8 ཡང་ན་ 4,7,12-16 ཡང་ན་ 2n-1)
diff --git a/app/core/src/main/resources/messages_ca_CA.properties b/app/core/src/main/resources/messages_ca_CA.properties
index 30a7f7624..7d49c1490 100644
--- a/app/core/src/main/resources/messages_ca_CA.properties
+++ b/app/core/src/main/resources/messages_ca_CA.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tipus de Color
 pdfToImage.color=Color
 pdfToImage.grey=Escala de Grisos
 pdfToImage.blackwhite=Blanc i Negre (Pot perdre dades!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Converteix
 pdfToImage.info=Python no està instal·lat. És necessari per a la conversió a WebP.
 pdfToImage.placeholder=(p. ex. 1,2,8 o 4,7,12-16 o 2n-1)
diff --git a/app/core/src/main/resources/messages_cs_CZ.properties b/app/core/src/main/resources/messages_cs_CZ.properties
index 7eb854aaa..c62fef539 100644
--- a/app/core/src/main/resources/messages_cs_CZ.properties
+++ b/app/core/src/main/resources/messages_cs_CZ.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Typ barev
 pdfToImage.color=Barevný
 pdfToImage.grey=Stupně šedi
 pdfToImage.blackwhite=Černobílý (Může dojít ke ztrátě dat!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Převést
 pdfToImage.info=Python není nainstalován. Vyžadován pro konverzi do WebP.
 pdfToImage.placeholder=(např. 1,2,8 nebo 4,7,12-16 nebo 2n-1)
diff --git a/app/core/src/main/resources/messages_da_DK.properties b/app/core/src/main/resources/messages_da_DK.properties
index 118e545e6..780d3db1b 100644
--- a/app/core/src/main/resources/messages_da_DK.properties
+++ b/app/core/src/main/resources/messages_da_DK.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Farvetype
 pdfToImage.color=Farve
 pdfToImage.grey=Gråtone
 pdfToImage.blackwhite=Sort og Hvid (Kan miste data!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konvertér
 pdfToImage.info=Python er ikke installeret. Påkrævet for WebP-konvertering.
 pdfToImage.placeholder=(f.eks. 1,2,8 eller 4,7,12-16 eller 2n-1)
diff --git a/app/core/src/main/resources/messages_de_DE.properties b/app/core/src/main/resources/messages_de_DE.properties
index 5f01823f1..46ac15f57 100644
--- a/app/core/src/main/resources/messages_de_DE.properties
+++ b/app/core/src/main/resources/messages_de_DE.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Farbtyp
 pdfToImage.color=Farbe
 pdfToImage.grey=Graustufen
 pdfToImage.blackwhite=Schwarzweiß (Datenverlust möglich!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Umwandeln
 pdfToImage.info=Python ist nicht installiert. Erforderlich für die WebP-Konvertierung.
 pdfToImage.placeholder=(z.B. 1,2,8 oder 4,7,12-16 oder 2n-1)
diff --git a/app/core/src/main/resources/messages_el_GR.properties b/app/core/src/main/resources/messages_el_GR.properties
index 82fc98ef9..95a2da87c 100644
--- a/app/core/src/main/resources/messages_el_GR.properties
+++ b/app/core/src/main/resources/messages_el_GR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Τύπος χρώματος
 pdfToImage.color=Έγχρωμο
 pdfToImage.grey=Κλίμακα του γκρι
 pdfToImage.blackwhite=Ασπρόμαυρο (Μπορεί να χαθούν δεδομένα!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Μετατροπή
 pdfToImage.info=Η Python δεν είναι εγκατεστημένη. Απαιτείται για μετατροπή WebP.
 pdfToImage.placeholder=(π.χ. 1,2,8 ή 4,7,12-16 ή 2n-1)
diff --git a/app/core/src/main/resources/messages_en_GB.properties b/app/core/src/main/resources/messages_en_GB.properties
index f78e80b65..a905a1f4d 100644
--- a/app/core/src/main/resources/messages_en_GB.properties
+++ b/app/core/src/main/resources/messages_en_GB.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Colour type
 pdfToImage.color=Colour
 pdfToImage.grey=Greyscale
 pdfToImage.blackwhite=Black and White (May lose data!)
+pdfToImage.dpi=DPI (The server limit is {0} dpi)
 pdfToImage.submit=Convert
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(e.g. 1,2,8 or 4,7,12-16 or 2n-1)
diff --git a/app/core/src/main/resources/messages_en_US.properties b/app/core/src/main/resources/messages_en_US.properties
index eb8a9236c..ca4d359d0 100644
--- a/app/core/src/main/resources/messages_en_US.properties
+++ b/app/core/src/main/resources/messages_en_US.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Color type
 pdfToImage.color=Color
 pdfToImage.grey=Grayscale
 pdfToImage.blackwhite=Black and White (May lose data!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Convert
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(e.g. 1,2,8 or 4,7,12-16 or 2n-1)
diff --git a/app/core/src/main/resources/messages_es_ES.properties b/app/core/src/main/resources/messages_es_ES.properties
index 5601e76c0..0425239a3 100644
--- a/app/core/src/main/resources/messages_es_ES.properties
+++ b/app/core/src/main/resources/messages_es_ES.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tipo de color
 pdfToImage.color=Color
 pdfToImage.grey=Escala de grises
 pdfToImage.blackwhite=Blanco y Negro (¡Puede perder datos!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Convertir
 pdfToImage.info=Python no está instalado. Se requiere para la conversión WebP.
 pdfToImage.placeholder=(por ejemplo 1,2,8 o 4,7,12-16 o 2n-1)
diff --git a/app/core/src/main/resources/messages_eu_ES.properties b/app/core/src/main/resources/messages_eu_ES.properties
index bda28227f..27adf3394 100644
--- a/app/core/src/main/resources/messages_eu_ES.properties
+++ b/app/core/src/main/resources/messages_eu_ES.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Kolore-mota
 pdfToImage.color=Kolorea
 pdfToImage.grey=Gris-eskala
 pdfToImage.blackwhite=Zuria eta Beltza (Datuak galdu ditzake!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Bihurtu
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(e.g. 1,2,8 or 4,7,12-16 or 2n-1)
diff --git a/app/core/src/main/resources/messages_fa_IR.properties b/app/core/src/main/resources/messages_fa_IR.properties
index a1cfbe5b5..dd8b1baf8 100644
--- a/app/core/src/main/resources/messages_fa_IR.properties
+++ b/app/core/src/main/resources/messages_fa_IR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=نوع رنگ
 pdfToImage.color=رنگ
 pdfToImage.grey=خاکستری
 pdfToImage.blackwhite=سیاه و سفید (ممکن است اطلاعات از دست برود!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=تبدیل
 pdfToImage.info=پایتون نصب نشده است. برای تبدیل WebP لازم است.
 pdfToImage.placeholder=(مثال: 1,2,8 یا 4,7,12-16 یا 2n-1)
diff --git a/app/core/src/main/resources/messages_fr_FR.properties b/app/core/src/main/resources/messages_fr_FR.properties
index 2a3a7c6b5..bffd9df8a 100644
--- a/app/core/src/main/resources/messages_fr_FR.properties
+++ b/app/core/src/main/resources/messages_fr_FR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Type d'impression
 pdfToImage.color=Couleur
 pdfToImage.grey=Niveaux de gris
 pdfToImage.blackwhite=Noir et blanc (peut engendrer une perte de données !)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Convertir
 pdfToImage.info=Python n'est pas installé. Nécessaire pour la conversion WebP.
 pdfToImage.placeholder=(par exemple : 1,2,8 ou 4,7,12-16 ou 2n-1)
diff --git a/app/core/src/main/resources/messages_ga_IE.properties b/app/core/src/main/resources/messages_ga_IE.properties
index 7a5d87de3..11459903f 100644
--- a/app/core/src/main/resources/messages_ga_IE.properties
+++ b/app/core/src/main/resources/messages_ga_IE.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Cineál dath
 pdfToImage.color=Dath
 pdfToImage.grey=Scála Liath
 pdfToImage.blackwhite=Dubh agus Bán (D’fhéadfadh sonraí a chailleadh!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Tiontaigh
 pdfToImage.info=Níl Python suiteáilte. Ag teastáil le haghaidh comhshó WebP.
 pdfToImage.placeholder=(m.sh. 1,2,8 nó 4,7,12-16 nó 2n-1)
diff --git a/app/core/src/main/resources/messages_hi_IN.properties b/app/core/src/main/resources/messages_hi_IN.properties
index ced3f3300..846fb7780 100644
--- a/app/core/src/main/resources/messages_hi_IN.properties
+++ b/app/core/src/main/resources/messages_hi_IN.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=रंग प्रकार
 pdfToImage.color=रंग
 pdfToImage.grey=ग्रेस्केल
 pdfToImage.blackwhite=काला और सफेद (डेटा खो सकता है!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=बदलें
 pdfToImage.info=Python स्थापित नहीं है। WebP रूपांतरण के लिए आवश्यक है।
 pdfToImage.placeholder=(जैसे 1,2,8 या 4,7,12-16 या 2n-1)
diff --git a/app/core/src/main/resources/messages_hr_HR.properties b/app/core/src/main/resources/messages_hr_HR.properties
index f311a93dd..c82f994fe 100644
--- a/app/core/src/main/resources/messages_hr_HR.properties
+++ b/app/core/src/main/resources/messages_hr_HR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tip boje
 pdfToImage.color=Boja
 pdfToImage.grey=Sivi tonovi
 pdfToImage.blackwhite=Crno-bijelo (mogu se izgubiti podaci!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Pretvori
 pdfToImage.info=Python nije instaliran. Treba je za konverziju na WebP.
 pdfToImage.placeholder=(t.j. 1,2,8 ili 4,7,12-16 ili 2n-1)
diff --git a/app/core/src/main/resources/messages_hu_HU.properties b/app/core/src/main/resources/messages_hu_HU.properties
index 3132d4fdc..7b3fe2f5d 100644
--- a/app/core/src/main/resources/messages_hu_HU.properties
+++ b/app/core/src/main/resources/messages_hu_HU.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Színtípus
 pdfToImage.color=Színes
 pdfToImage.grey=Szürkeárnyalatos
 pdfToImage.blackwhite=Fekete-fehér (adatvesztéssel járhat!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konvertálás
 pdfToImage.info=Python nincs telepítve. WebP konverzióhoz szükséges.
 pdfToImage.placeholder=(pl. 1,2,8 vagy 4,7,12-16 vagy 2n-1)
diff --git a/app/core/src/main/resources/messages_id_ID.properties b/app/core/src/main/resources/messages_id_ID.properties
index 3a706535a..d7f490f79 100644
--- a/app/core/src/main/resources/messages_id_ID.properties
+++ b/app/core/src/main/resources/messages_id_ID.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tipe warna
 pdfToImage.color=Warna
 pdfToImage.grey=Skala abu-abu
 pdfToImage.blackwhite=Black and White (Bisa kehilangan data!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konversi
 pdfToImage.info=Python tidak terinstal. Diperlukan untuk konversi WebP.
 pdfToImage.placeholder=(misalnya 1,2,8 atau 4,7,12-16 atau 2n-1)
diff --git a/app/core/src/main/resources/messages_it_IT.properties b/app/core/src/main/resources/messages_it_IT.properties
index bba74394b..a77d42248 100644
--- a/app/core/src/main/resources/messages_it_IT.properties
+++ b/app/core/src/main/resources/messages_it_IT.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tipo di colore
 pdfToImage.color=A colori
 pdfToImage.grey=Scala di grigi
 pdfToImage.blackwhite=Bianco e Nero (potresti perdere dettagli!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Converti
 pdfToImage.info=Python non è installato.È richiesto per la conversione WebP.
 pdfToImage.placeholder=(es. 1,2,8 o 4,7,12-16 o 2n-1)
diff --git a/app/core/src/main/resources/messages_ja_JP.properties b/app/core/src/main/resources/messages_ja_JP.properties
index bdb30dc7b..deec1596b 100644
--- a/app/core/src/main/resources/messages_ja_JP.properties
+++ b/app/core/src/main/resources/messages_ja_JP.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=カラーモード
 pdfToImage.color=カラー
 pdfToImage.grey=グレースケール
 pdfToImage.blackwhite=白黒（データが失われる可能性があります！）
+pdfToImage.dpi=DPI:
 pdfToImage.submit=変換
 pdfToImage.info=Pythonがインストールされていません。WebPの変換に必要です。
 pdfToImage.placeholder=(例:1,2,8、4,7,12-16、2n-1)
diff --git a/app/core/src/main/resources/messages_ko_KR.properties b/app/core/src/main/resources/messages_ko_KR.properties
index 76f7ca715..b3dacf50f 100644
--- a/app/core/src/main/resources/messages_ko_KR.properties
+++ b/app/core/src/main/resources/messages_ko_KR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=색상 유형
 pdfToImage.color=컬러
 pdfToImage.grey=그레이스케일
 pdfToImage.blackwhite=흑백 (데이터 손실 가능성 있음!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=변환
 pdfToImage.info=WebP 변환에는 Python이 필요합니다. Python이 설치되지 않았습니다.
 pdfToImage.placeholder=(예: 1,2,8 또는 4,7,12-16 또는 2n-1)
diff --git a/app/core/src/main/resources/messages_ml_IN.properties b/app/core/src/main/resources/messages_ml_IN.properties
index 164209212..b2e093ed5 100644
--- a/app/core/src/main/resources/messages_ml_IN.properties
+++ b/app/core/src/main/resources/messages_ml_IN.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=നിറ തരം
 pdfToImage.color=നിറം
 pdfToImage.grey=ഗ്രേസ്കെയിൽ
 pdfToImage.blackwhite=കറുപ്പും വെളുപ്പും (ഡാറ്റ നഷ്ടപ്പെട്ടേക്കാം!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=പരിവർത്തനം ചെയ്യുക
 pdfToImage.info=പൈത്തൺ ഇൻസ്റ്റാൾ ചെയ്തിട്ടില്ല. WebP പരിവർത്തനത്തിന് ആവശ്യമാണ്.
 pdfToImage.placeholder=(ഉദാ. 1,2,8 അല്ലെങ്കിൽ 4,7,12-16 അല്ലെങ്കിൽ 2n-1)
diff --git a/app/core/src/main/resources/messages_nl_NL.properties b/app/core/src/main/resources/messages_nl_NL.properties
index 9a1af6e0a..b59d9b4d9 100644
--- a/app/core/src/main/resources/messages_nl_NL.properties
+++ b/app/core/src/main/resources/messages_nl_NL.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Kleurtype
 pdfToImage.color=Kleur
 pdfToImage.grey=Grijstinten
 pdfToImage.blackwhite=Zwart en wit (kan data verliezen!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Omzetten
 pdfToImage.info=Python is niet geïnstalleerd. Vereist voor WebP-conversie.
 pdfToImage.placeholder=(bijv. 1,2,8 of 4,7,12-16 of 2n-1)
diff --git a/app/core/src/main/resources/messages_no_NB.properties b/app/core/src/main/resources/messages_no_NB.properties
index 03d42816d..45b459455 100644
--- a/app/core/src/main/resources/messages_no_NB.properties
+++ b/app/core/src/main/resources/messages_no_NB.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Farge type
 pdfToImage.color=Farge
 pdfToImage.grey=Gråtone
 pdfToImage.blackwhite=Svart-hvitt (kan miste data!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konverter
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(f.eks. 1,2,8 eller 4,7,12-16 eller 2n-1)
diff --git a/app/core/src/main/resources/messages_pl_PL.properties b/app/core/src/main/resources/messages_pl_PL.properties
index 4963d7bc6..c0937161b 100644
--- a/app/core/src/main/resources/messages_pl_PL.properties
+++ b/app/core/src/main/resources/messages_pl_PL.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Rodzaj koloru
 pdfToImage.color=Kolor
 pdfToImage.grey=Odcień szarości
 pdfToImage.blackwhite=Czarno-biały (może spowodować utratę danych!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konwertuj
 pdfToImage.info=Python nie został zainstalowany. Jest wymagany do konwersji WebP.
 pdfToImage.placeholder=(przykład 1,2,8 lub 2n-1)
diff --git a/app/core/src/main/resources/messages_pt_BR.properties b/app/core/src/main/resources/messages_pt_BR.properties
index 552139b52..51a4fb405 100644
--- a/app/core/src/main/resources/messages_pt_BR.properties
+++ b/app/core/src/main/resources/messages_pt_BR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Cor de saída:
 pdfToImage.color=Colorido
 pdfToImage.grey=Escala de Cinza
 pdfToImage.blackwhite=Preto e Branco (pode perder informações!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Converter
 pdfToImage.info=Python não está instalado. Necessário para conversão WebP.
 pdfToImage.placeholder=(por exemplo 1,2,8 ou 4,7,12-16 ou 2n-1)
diff --git a/app/core/src/main/resources/messages_pt_PT.properties b/app/core/src/main/resources/messages_pt_PT.properties
index dc99a45c9..1f226999e 100644
--- a/app/core/src/main/resources/messages_pt_PT.properties
+++ b/app/core/src/main/resources/messages_pt_PT.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tipo de cor
 pdfToImage.color=Cor
 pdfToImage.grey=Escala de Cinza
 pdfToImage.blackwhite=Preto e Branco (Pode perder dados!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Converter
 pdfToImage.info=Python não está instalado. Necessário para conversão WebP.
 pdfToImage.placeholder=(ex. 1,2,8 ou 4,7,12-16 ou 2n-1)
diff --git a/app/core/src/main/resources/messages_ro_RO.properties b/app/core/src/main/resources/messages_ro_RO.properties
index 25bc477b1..70fb5e083 100644
--- a/app/core/src/main/resources/messages_ro_RO.properties
+++ b/app/core/src/main/resources/messages_ro_RO.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Tip culoare
 pdfToImage.color=Culoare
 pdfToImage.grey=Scală de gri
 pdfToImage.blackwhite=Alb și negru (Poate pierde date!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Convertește
 pdfToImage.info=Python nu este instalat. Necesar pentru conversia WebP.
 pdfToImage.placeholder=(ex. 1,2,8 sau 4,7,12-16 sau 2n-1)
diff --git a/app/core/src/main/resources/messages_ru_RU.properties b/app/core/src/main/resources/messages_ru_RU.properties
index e414408f1..bb5001fb2 100644
--- a/app/core/src/main/resources/messages_ru_RU.properties
+++ b/app/core/src/main/resources/messages_ru_RU.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Тип цвета
 pdfToImage.color=Цветной
 pdfToImage.grey=Оттенки серого
 pdfToImage.blackwhite=Черно-белый (возможна потеря данных!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Преобразовать
 pdfToImage.info=Python не установлен. Требуется для конвертации в WebP.
 pdfToImage.placeholder=(например, 1,2,8 или 4,7,12-16 или 2n-1)
diff --git a/app/core/src/main/resources/messages_sk_SK.properties b/app/core/src/main/resources/messages_sk_SK.properties
index 094265d29..ef9cff19a 100644
--- a/app/core/src/main/resources/messages_sk_SK.properties
+++ b/app/core/src/main/resources/messages_sk_SK.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Typ farby
 pdfToImage.color=Farba
 pdfToImage.grey=Odtiene šedej
 pdfToImage.blackwhite=Čierno-biele (Môže stratiť údaje!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konvertovať
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(napr. 1,2,8 alebo 4,7,12-16 alebo 2n-1)
diff --git a/app/core/src/main/resources/messages_sl_SI.properties b/app/core/src/main/resources/messages_sl_SI.properties
index f75e714af..94f12b5e0 100644
--- a/app/core/src/main/resources/messages_sl_SI.properties
+++ b/app/core/src/main/resources/messages_sl_SI.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Vrsta barve
 pdfToImage.color=Barva
 pdfToImage.grey=Sivine
 pdfToImage.blackwhite=Črno-belo (Lahko izgubite podatke!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Pretvori
 pdfToImage.info=Python ni nameščen. Zahtevano za pretvorbo WebP.
 pdfToImage.placeholder=(npr. 1,2,8 ali 4,7,12-16 ali 2n-1)
diff --git a/app/core/src/main/resources/messages_sr_LATN_RS.properties b/app/core/src/main/resources/messages_sr_LATN_RS.properties
index 809a785ee..025340466 100644
--- a/app/core/src/main/resources/messages_sr_LATN_RS.properties
+++ b/app/core/src/main/resources/messages_sr_LATN_RS.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Režim boja:
 pdfToImage.color=Kolor
 pdfToImage.grey=Monohromatski
 pdfToImage.blackwhite=Crno-belo (Može izgubiti detalje!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konvertuj
 pdfToImage.info=Python nije instaliran. Neophodan je za WebP konverziju.
 pdfToImage.placeholder=(npr. 1,2,8 ili 4,7,12-16 ili 2n-1)
diff --git a/app/core/src/main/resources/messages_sv_SE.properties b/app/core/src/main/resources/messages_sv_SE.properties
index 086789fcd..4ae6d0307 100644
--- a/app/core/src/main/resources/messages_sv_SE.properties
+++ b/app/core/src/main/resources/messages_sv_SE.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Färgtyp
 pdfToImage.color=Färg
 pdfToImage.grey=Gråskala
 pdfToImage.blackwhite=Svartvitt (kan förlora data!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Konvertera
 pdfToImage.info=Python är inte installerat. Krävs för WebP-konvertering.
 pdfToImage.placeholder=(t.ex. 1,2,8 eller 4,7,12-16 eller 2n-1)
diff --git a/app/core/src/main/resources/messages_th_TH.properties b/app/core/src/main/resources/messages_th_TH.properties
index 2637eadf2..8d73eda40 100644
--- a/app/core/src/main/resources/messages_th_TH.properties
+++ b/app/core/src/main/resources/messages_th_TH.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=ประเภทสี
 pdfToImage.color=สี
 pdfToImage.grey=ระดับสีเทา
 pdfToImage.blackwhite=ขาวดำ (อาจสูญเสียข้อมูล!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=แปลง
 pdfToImage.info=Python ไม่มีการติดตั้ง จำเป็นสำหรับการแปลง WebP
 pdfToImage.placeholder=(เช่น 1,2,8 หรือ 4,7,12-16 หรือ 2n-1)
diff --git a/app/core/src/main/resources/messages_tr_TR.properties b/app/core/src/main/resources/messages_tr_TR.properties
index 2da6244ff..f91012e76 100644
--- a/app/core/src/main/resources/messages_tr_TR.properties
+++ b/app/core/src/main/resources/messages_tr_TR.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Renk türü
 pdfToImage.color=Renk
 pdfToImage.grey=Gri tonlama
 pdfToImage.blackwhite=Siyah ve Beyaz (Veri kaybolabilir!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Dönüştür
 pdfToImage.info=Python kurulu değil. WebP dönüşümü için gereklidir.
 pdfToImage.placeholder=(örneğin 1,2,8 veya 4,7,12-16 ya da 2n-1)
diff --git a/app/core/src/main/resources/messages_uk_UA.properties b/app/core/src/main/resources/messages_uk_UA.properties
index 89518dca8..655f59aed 100644
--- a/app/core/src/main/resources/messages_uk_UA.properties
+++ b/app/core/src/main/resources/messages_uk_UA.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Тип кольору
 pdfToImage.color=Колір
 pdfToImage.grey=Відтінки сірого
 pdfToImage.blackwhite=Чорно-білий (може втратити дані!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Конвертувати
 pdfToImage.info=Python не встановлено. Необхідно для конвертації WebP.
 pdfToImage.placeholder=(наприклад 1,2,8 або 4,7,12-16 або 2n-1)
diff --git a/app/core/src/main/resources/messages_vi_VN.properties b/app/core/src/main/resources/messages_vi_VN.properties
index dcf69cce8..d9f960096 100644
--- a/app/core/src/main/resources/messages_vi_VN.properties
+++ b/app/core/src/main/resources/messages_vi_VN.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=Loại màu
 pdfToImage.color=Màu
 pdfToImage.grey=Thang độ xám
 pdfToImage.blackwhite=Đen trắng (Có thể mất dữ liệu!)
+pdfToImage.dpi=DPI:
 pdfToImage.submit=Chuyển đổi
 pdfToImage.info=Python is not installed. Required for WebP conversion.
 pdfToImage.placeholder=(ví dụ: 1,2,8 hoặc 4,7,12-16 hoặc 2n-1)
diff --git a/app/core/src/main/resources/messages_zh_CN.properties b/app/core/src/main/resources/messages_zh_CN.properties
index 247b6ea70..334be7a69 100644
--- a/app/core/src/main/resources/messages_zh_CN.properties
+++ b/app/core/src/main/resources/messages_zh_CN.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=颜色类型
 pdfToImage.color=颜色
 pdfToImage.grey=灰度
 pdfToImage.blackwhite=黑白（可能会丢失数据！）。
+pdfToImage.dpi=DPI:
 pdfToImage.submit=转换
 pdfToImage.info=WebP 转换需要安装 Python
 pdfToImage.placeholder=（例如：1,2,8 或 4,7,12-16 或 2n-1）
diff --git a/app/core/src/main/resources/messages_zh_TW.properties b/app/core/src/main/resources/messages_zh_TW.properties
index bbd3cd495..277998e35 100644
--- a/app/core/src/main/resources/messages_zh_TW.properties
+++ b/app/core/src/main/resources/messages_zh_TW.properties
@@ -1402,6 +1402,7 @@ pdfToImage.colorType=顏色類型
 pdfToImage.color=顏色
 pdfToImage.grey=灰度
 pdfToImage.blackwhite=黑白（可能會遺失資料！）
+pdfToImage.dpi=DPI:
 pdfToImage.submit=轉換
 pdfToImage.info=尚未安裝 Python。需要安裝 Python 才能進行 WebP 轉換。
 pdfToImage.placeholder=（例如 1,2,8 或 4,7,12-16 或 2n-1）
diff --git a/app/core/src/main/resources/settings.yml.template b/app/core/src/main/resources/settings.yml.template
index cf22262e4..1af95f852 100644
--- a/app/core/src/main/resources/settings.yml.template
+++ b/app/core/src/main/resources/settings.yml.template
@@ -108,6 +108,7 @@ system:
   enableAnalytics: null # set to 'true' to enable analytics, set to 'false' to disable analytics; for enterprise users, this is set to true
   enableUrlToPDF: false # Set to 'true' to enable URL to PDF, INTERNAL ONLY, known security issues, should not be used externally
   disableSanitize: false # set to true to disable Sanitize HTML; (can lead to injections in HTML)
+  maxDPI: 500 # Maximum allowed DPI for PDF to image conversion
   html:
     urlSecurity:
       enabled: true # Enable URL security restrictions for HTML processing
diff --git a/app/core/src/main/resources/templates/convert/pdf-to-img.html b/app/core/src/main/resources/templates/convert/pdf-to-img.html
index b4f2b0657..7ced14d27 100644
--- a/app/core/src/main/resources/templates/convert/pdf-to-img.html
+++ b/app/core/src/main/resources/templates/convert/pdf-to-img.html
@@ -4,6 +4,21 @@
 
 <head>
   <th:block th:insert="~{fragments/common :: head(title=#{pdfToImage.title}, header=#{pdfToImage.header})}"></th:block>
+  <script th:inline="javascript">
+    document.addEventListener("DOMContentLoaded", function () {
+      const maxDPI = /*[[${maxDPI}]]*/ 500; // Maximum DPI for PDF to image conversion
+      const maxDPILabelRaw = /*[[#{pdfToImage.dpi}]]*/ "DPI (The server limit is {0} dpi)"; // Maximum DPI for PDF to image conversion
+      const maxDPILabel = maxDPILabelRaw.replace("{0}", maxDPI); // Replace with actual value from properties
+      const dpilabel = document.querySelector('label[for="dpi"]');
+      if (dpilabel) {
+        dpilabel.textContent = maxDPILabel;
+      }
+      const maxDPIInput = document.getElementById("dpi");
+      if (maxDPIInput) {
+        maxDPIInput.setAttribute("max", maxDPI); // Set the maximum value for DPI input
+      }
+    });
+  </script>
 </head>
 
 <body>
diff --git a/devGuide/DeveloperGuide.md b/devGuide/DeveloperGuide.md
index c37be9b84..fb8911eaf 100644
--- a/devGuide/DeveloperGuide.md
+++ b/devGuide/DeveloperGuide.md
@@ -295,6 +295,7 @@ Stirling-PDF can be customized through environment variables or a `settings.yml`
 - Security settings
 - UI customization
 - Endpoint management
+- Maximum DPI for PDF to image conversion (`system.maxDPI`)
 
 When using Docker, pass environment variables using the `-e` flag or in your `docker-compose.yml` file.