locally hosted web application that allows you to perform various operations on PDF files
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Balázs Szücs 98fa5dfcc1
[V2] feat(sign): add automatic white background removal for signature images (#5210)
# Description of Changes



This pull request adds a new feature that allows users to automatically
remove the white background from uploaded signature images, making them
transparent. The changes include UI improvements for image uploading,
new image processing utilities, and updates to translation files for
better user feedback.

### Image Upload & Processing Enhancements

* Added a `removeWhiteBackground` utility function in
`imageTransparency.ts` to process images and remove white backgrounds,
with options for automatic corner color detection and tolerance
settings.
* Updated the `ImageUploader` component to support background removal,
including a checkbox for toggling the feature, processing state
feedback, and integration with the new utility

### Signature Tool Integration

* Modified `SignSettings.tsx` to enable the background removal feature
for signature images, handle processed image data, and ensure signature
placement logic works seamlessly with the new feature.

### UI & Localization Updates

* Added new translation strings for background removal and image
processing feedback in the English locale file.



https://github.com/user-attachments/assets/28263940-1756-4f0e-9bfb-5603a6fb8a2c


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Please provide a summary of the changes, including:

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- Why the change was made
- Any challenges encountered

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---

## Checklist

### General

- [X] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [X] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [X] I have performed a self-review of my own code
- [X] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [X] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Signed-off-by: Balázs Szücs <bszucs1209@gmail.com>
2025-12-26 23:50:21 +00:00
.devcontainer chore: update development configs, formatting tools, and CI enhancements (#4130) 2025-08-08 12:52:51 +01:00
.github build(deps): bump docker/metadata-action from 5.8.0 to 5.10.0 (#5299) 2025-12-25 13:49:29 +00:00
.vscode V2 Auto rename (#4244) 2025-09-05 17:12:52 +01:00
app [V2] feat(convert): add eBook (EPUB, MOBI, AZW3, FB2) to PDF conversion options and UI (#5291) 2025-12-25 14:58:10 +00:00
devGuide V1 merge (#5193) 2025-12-21 10:40:32 +00:00
devTools V1 merge (#5193) 2025-12-21 10:40:32 +00:00
docker 🤖 format everything with pre-commit by stirlingbot (#5144) 2025-12-22 15:44:38 +00:00
docs V1 merge (#5193) 2025-12-21 10:40:32 +00:00
frontend [V2] feat(sign): add automatic white background removal for signature images (#5210) 2025-12-26 23:50:21 +00:00
gradle/wrapper Upgrade Gradle to 8.14 in CI Workflows and Gradle Wrapper (#3425) 2025-04-27 16:17:07 +01:00
images Revert "[ImgBot] Optimize images" (#5293) 2025-12-22 22:10:23 +00:00
scripts feat(translations): add command to remove unused translation keys (#5292) 2025-12-25 23:24:30 +00:00
testing 🤖 format everything with pre-commit by stirlingbot (#5144) 2025-12-22 15:44:38 +00:00
.dockerignore java frontend (#5097) 2025-12-02 17:15:29 +00:00
.editorconfig Add linting to frontend (#4341) 2025-09-04 14:08:28 +01:00
.git-blame-ignore-revs refactor: move modules under app/ directory and update file paths (#3938) 2025-07-14 20:53:11 +01:00
.gitattributes refactor: move modules under app/ directory and update file paths (#3938) 2025-07-14 20:53:11 +01:00
.gitignore Builds custom Jar (#5029) 2025-11-26 17:21:42 +00:00
.pre-commit-config.yaml V1 merge (#5193) 2025-12-21 10:40:32 +00:00
ADDING_TOOLS.md Toml (#5115) 2025-12-03 09:57:00 +00:00
build.gradle build(deps): bump imageioVersion from 3.12.0 to 3.13.0 (#5295) 2025-12-24 22:13:38 +00:00
CLAUDE.md Feature/viewer annotation toggle (#4557) 2025-10-02 10:40:18 +01:00
CONTRIBUTING.md exception handling and exception improvements (#3858) 2025-07-02 16:51:45 +01:00
DATABASE.md feat(database): make backup schedule configurable via system keys (#4251) 2025-09-04 15:02:31 +01:00
DeveloperGuide.md V2 Tauri integration (#3854) 2025-11-05 11:44:59 +00:00
gradle.properties build(local): simplify writeVersion task with WriteProperties plugin and enable build caching (#4139) 2025-08-08 10:36:30 +01:00
gradlew Upgrade Gradle to 8.14 in CI Workflows and Gradle Wrapper (#3425) 2025-04-27 16:17:07 +01:00
gradlew.bat Upgrade Gradle to 8.14 in CI Workflows and Gradle Wrapper (#3425) 2025-04-27 16:17:07 +01:00
HowToUseOCR.md Improve Markdown documentation a bit 2024-12-22 17:37:58 +08:00
launch4jConfig.xml ci: enhance GitHub Actions workflows with Gradle setup, caching improvements, and Docker image testing (#3956) 2025-07-16 17:17:11 +01:00
LICENSE Update LICENSE with proprietary directory details 2025-11-27 11:11:53 +00:00
package-lock.json Feature/v2/improve sign (#4627) 2025-10-09 13:35:42 +01:00
README.md Update wording for third-party services reference 2025-12-02 19:14:03 +00:00
SECURITY.md Improve Markdown documentation a bit 2024-12-22 17:37:58 +08:00
settings.gradle refactor: move modules under app/ directory and update file paths (#3938) 2025-07-14 20:53:11 +01:00
test_globalsign.pdf V2 Validate PDF Signature tool (#4679) 2025-10-16 13:45:59 +01:00
test_irs_signed.pdf V2 Validate PDF Signature tool (#4679) 2025-10-16 13:45:59 +01:00
WINDOWS_SIGNING.md Add initial Windows signing infrastructure (#4945) 2025-11-20 12:21:42 +00:00

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Stirling PDF - The Open-Source PDF Platform

Stirling PDF is a powerful, open-source PDF editing platform. Run it as a personal desktop app, in the browser, or deploy it on your own servers with a private API. Edit, sign, redact, convert, and automate PDFs without sending documents to external services.

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Key Capabilities

  • Everywhere you work - Desktop client, browser UI, and self-hosted server with a private API.
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  • Developer platform - REST APIs available for nearly all tools to integrate into your existing systems.
  • Global UI - Interface available in 40+ languages.

For a full feature list, see the docs: https://docs.stirlingpdf.com

Quick Start

docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf

Then open: http://localhost:8080

For full installation options (including desktop and Kubernetes), see our Documentation Guide.

Resources

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Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

For development setup, see the Developer Guide.

For adding translations, see the Translation Guide.

License

Stirling PDF is open-core. See LICENSE for details.