Icon of Stirling PDF app on Umbrel App Store

Stirling PDF

Merge, split, rotate, and convert PDFs with ease

Stirling Tools

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About this app

Stirling PDF is a robust, locally hosted web-based PDF manipulation tool that offers a comprehensive set of features to address all your PDF requirements. It allows you to perform various operations on PDF files, including splitting, merging, converting, reorganizing, adding images, rotating, compressing, and more. All operations are performed locally, ensuring the utmost privacy and security of your files.

⚠️ Note After installation, Stirling PDF takes a few minutes to start up. Please be patient and wait for the app to download packages and fonts.

📄 Page Operations Stirling PDF provides a full interactive GUI for merging, splitting, rotating, and moving PDFs and their pages. You can view and modify multi-page PDFs with custom viewing, sorting, and searching options. On-page edit features like annotation, drawing, and adding text and images are also available. You can also reorganize PDF pages into different orders, rotate PDFs in 90-degree increments, and remove pages.

🔄️ Conversion Operations Convert PDFs to and from images, convert any common file to PDF, and convert PDF to Word, PowerPoint, and other formats. You can also convert HTML, URLs, and Markdown to PDF.

🛡️ Security & Permissions Add and remove passwords, change or set PDF permissions, add watermarks, certify or sign PDFs, sanitize PDFs, and auto-redact text for enhanced security.

🛠️ Other Operations: Add, generate, or write signatures, repair PDFs, detect and remove blank pages, compare two PDFs and show differences in text, add images to PDFs, compress PDFs to decrease their filesize, extract images from PDF, add page numbers, perform OCR on PDF, convert PDF/A, edit metadata, flatten PDFs, and get all information on a PDF to view or export as JSON.

What's new
Version 1.5.0this month

This update includes several new features and improvements:

  • Added PDF to Vector Image conversions
  • New "Extract Attachments" tool to export embedded files as ZIP
  • Enhanced PDF info tool with more details on attachments, images, forms, and technical overview
  • Improved analytics with easier opt-out options
  • Fixed issues causing large file sizes in multi-tool and extract pages features
  • Added support for configuring rendering DPI in Flatten PDF feature
  • Various security fixes and performance enhancements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.4.0last month

This update includes several improvements and new features:

  • Added option to correctly remove text outside crop window in Crop tool
  • Added CBZ to PDF and PDF to CBZ conversion
  • Added PDF to CBR conversion (requires manual installation of rar)
  • Added extra color options in Sign and Replace Colors tools
  • Fixed Get Info tool to correctly check PDF compliancy
  • Fixed Merge order by time
  • Improved form field copying and transformation for multi-page PDF layouts
  • Enhanced CMYK color space conversion with prepress preset
  • Added signature color picker and custom signature colors
  • Improved metadata handling for sorting by date in Merge tool
  • Various bug fixes and performance improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.3.22 months ago

This update includes several enhancements and bug fixes:

  • Fixed a login bug for users with accounts older than 14 months
  • Added support for text removal in auto-redact without image conversion
  • Improved PDF to image conversion to show annotations and highlights
  • Added font color option for page numbers
  • Enhanced split PDF with better file number padding
  • Improved Table of Contents with bookmark import/export
  • Added PSD support for image-to-PDF conversion
  • Added urgency indicators for updates with security patches
  • Various optimizations and refactors to improve stability and performance

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.2.03 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Fixed issues with pipeline, stamp, and SAML operations
  • Added PSD support for image-to-PDF conversion
  • Improved Table of Contents with bookmark import/export
  • Added urgency indicators for updates with security patches
  • Added configurable max DPI for PDF-to-image conversion
  • Various translation updates and minor UI improvements
  • Optimized Dockerfiles and build processes

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.1.13 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Various small bug fixes related to pipeline functionality and other issues causing unexpected errors
  • Update 3rd Party Licenses
  • V2 settings api (Added to V1)
  • Remove file locks plus formatting
  • Fix search functionality in dropdown
  • Fix pipeline paths and support default WebUI pipeline config extraction
  • Improve scaling of navbar for page-view and redact
  • Disable cookie banner when analytics disabled
  • Various bug fixes and minor improvements
  • Updated translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.1.03 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Bug fixes with UI scaling, Navbar and others
  • Auth.log not generating correctly
  • HTML sanitisation now further sanitises the <img> tag for security to avoid external GET calls. This is enabled by default but can be disabled (via settings.yml) should you need this HTML functionality
  • Various extra security changes and patches
  • Support for multi-file async job results and ZIP extraction
  • Scanner effect feature (formerly Fake scan)
  • Refactored modules under app/ directory and updated file paths
  • Improved scaling of navbar for page-view and redact
  • Disable cookie banner when analytics disabled
  • Various bug fixes and minor improvements
  • Updated translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 1.0.24 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Legacy homepage has been removed due to great feedback and love from the community for the new homepage
  • Malayalam language added
  • EML(email) to PDF Feature added
  • Table of Contents editing feature added
  • Fake Scan page feature added to convert a PDF to look like its been scanned (WIP, may be removed)
  • OCR and Compression back to using OCRMyPDF and Ghostscript for advanced PDF operations
  • Added tmp file manager to ensure all files are cleared even in event of crashes
  • Add file attachments to PDF feature added
  • Various bug fixes and minor improvements
  • Updated translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.46.26 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Legacy homepage has been removed due to great feedback and love from the community for the new homepage
  • Malayalam language added
  • Pro/Enterprise licenses now support floating between machines
  • Various bug fixes and minor improvements
  • Updated translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.46.16 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Home page UI scaling change for better viewability on small screens
  • New Email API to allow Email within Stirling PDF (work in progress)
  • More aggressive compression at higher numbers
  • Various bug fixes and minor improvements
  • Updated translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.46.06 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Fixed bugs including multi-tool select buttons and footer in view-pdf
  • Made file extension checks case-insensitive
  • Added new 'unlock PDF Form' functionality to remove read-only locks from forms
  • Improved language support with updates to multiple translations
  • Minor UI and backend improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.45.66 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Fixed a bug for pipeline not loading correctly
  • Resolved an issue with signature drawing 'lagging' on certain devices
  • Reduced errors found via analytics
  • Updated Italian translations
  • Minor UI and backend improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.45.57 months ago

This update of Stirling PDF includes several enhancements and improvements:

  • Added a file upload limit setting to display server-set limits
  • Improved language support with updates to Italian and Traditional Chinese translations
  • Enhanced enterprise features
  • Minor UI and backend improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.45.47 months ago

This update of stirling-pdf contains multiple new features, improvements, and bug fixes.

Key improvements:

  • Added Google Drive integration for Pro users
  • Implemented GDPR-compliant cookie banner
  • Enhanced user creation and file validation
  • Improved PDF handling and UI cleanups
  • Various bug fixes, including unoserver startup and PDF info access
  • Translation updates across multiple languages
  • Minor enhancements to Docker setup and dev tools
  • Deprecated Enterprise Edition

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.45.07 months ago

⚠️ This update includes a significant security fix. URL-to-PDF functionality is now disabled by default.

Key improvements in this release:

  • Enhanced security measures
  • Improved memory usage for PDF merging
  • Fixed image addition within the view/edit PDF page
  • Added support for custom Java options
  • Various bug fixes and performance improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.44.28 months ago

Key improvements in this release:

  • Enhanced PDF compression functionality
  • Added undo/redo feature for signature writing
  • Improved handling of ZIP files
  • Various bug fixes and performance improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.44.18 months ago

Key improvements in this release:

  • Fixed an issue causing some files to remain on the server after processing
  • Added support for automatic extraction of required files from ZIP archives within the browser
  • Improved handling of ZIP files
  • Added new claim attributes 'mail' and 'uid'
  • Enhanced file size formatting
  • Various bug fixes and performance improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.42.08 months ago

Key improvements in this release:

  • Resolved multiple bugs, including issues with PDF compression

  • Updated the backend documentation conversion service from Unoconv to Unoserver (please report any conversion issues)

  • Implemented numerous dependency and security updates

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.41.09 months ago

Key improvements in this release:

  • Fixed various homepage and interface issues
  • Improved PDF/A conversion functionality
  • Fixed ZIP file handling
  • Enhanced auto-split functionality
  • Added new Brazilian Portuguese translations
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.40.19 months ago

Key improvements in this release:

  • Released new homepage design
  • Improved configuration system
  • Fixed PDF split range handling issues
  • Enhanced logging functionality
  • Fixed UI issues on the homepage
  • Improved tab container logic
  • Added option to disable HTML sanitization for some advanced HTML documents in HTML to PDF conversion
  • Added new translations for Japanese, Irish, Brazilian Portuguese, and Italian
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.39.09 months ago

Key improvements in this release:

  • Improved memory usage with better cleanup after operations
  • Added new API endpoints for automation and scripting
  • Improved Czech and French translations
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.38.09 months ago

Key improvements in this release:

  • Added new PDF to markdown conversion feature
  • Improved font handling in PDF signing
  • Enhanced redaction tool with updated tooltips
  • Improved translations for Italian, Traditional Chinese, Korean, and German languages
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.37.110 months ago

Key improvements in this release:

  • Fixed PDF compression sizing issues
  • Fixed image-to-PDF URL functionality
  • Improved translations for multiple languages including Portuguese, Hindi, Greek, German and Russian
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.37.010 months ago

Key improvements in this release:

  • New manual redaction feature with text selection and box drawing capabilities
  • Added external database support for enterprise deployments
  • Added SSO auto-login functionality
  • Improved PDF to image conversion with page number support
  • UI improvements and cleanup
  • Added Tibetan language support
  • Various security enhancements and bug fixes

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.36.610 months ago

Key improvements in this release:

  • Improved signature functionality with better handling and user experience
  • Fixed file drag-and-drop functionality
  • Enhanced Traditional Chinese translations
  • Various bug fixes and stability improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.36.510 months ago

Key improvements in this release:

  • Bug fixes for form data handling and image processing
  • Improved PDF page dimension handling
  • Enhanced configuration management
  • Updated Italian translations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.36.211 months ago

Key improvements in this release:

  • Security improvements and fixes
  • Enhanced file upload handling
  • Updated translations for multiple languages

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.36.011 months ago

Key improvements in this release:

  • Added PDF certificate validation with Mozilla CA support
  • Added permissions display in a separate tab
  • Improved undo/redo functionality for page operations
  • Enhanced file upload handling and submit button fixes
  • Updated translations for multiple languages

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.35.111 months ago

Key improvements in this release:

  • Improved file input menu with enhanced drag and drop support
  • Fixed handling of multiple files in various operations
  • Added support for new line breaks in stamp text
  • Various UI improvements and bug fixes
  • Updated translations for multiple languages

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.35.011 months ago

⚠️ This release updates the Optical Character Recognition (OCR) tool, which is used to recognize text in files. The new tool is missing some features that were available previously. The Stirling PDF team is actively exploring better options for future updates.

Key improvements in this release:

  • Added undo/redo functionality to multi-tool interface
  • Fixed page break insertion in multi-tool
  • Fixed file handling during merge operations
  • Added Azerbaijani language translation
  • Various bug fixes and security improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.34.011 months ago

Key improvements in this release:

  • Significantly improved PDF to CSV conversion functionality
  • Enhanced multi-tool interface with drag and drop support for multiple pages
  • Added ability to place signatures on multiple PDF pages simultaneously
  • Various UI improvements and bug fixes

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.33.112 months ago

Key improvements in this release:

  • Fixed issues with adding images to PDFs
  • Fixed PDF to CSV conversion functionality

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.32.012 months ago

Key improvements in this release:

  • Added ability to insert blank pages between existing pages
  • Improved navbar layout and user interface
  • Enhanced PDF signing functionality
  • Added multiple language improvements and translations
  • Fixed various UI and functionality issues

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.31.112 months ago

Key improvements in this release:

  • Bug fixes for PDF compression functionality
  • Italian language translation updates

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.31.012 months ago

Key improvements in this release:

  • Added support for saving and reusing signature images
  • Enhanced PDF comparison performance
  • Improved SAML2 integration with better certificate handling
  • Added automatic detection of external dependencies
  • Added visual certificate signing
  • Improved image handling with EXIF orientation support
  • Added new translations and language improvements

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.30.112 months ago

Highlights:

  • New user survey
  • Home page improvements
  • Added optional Opt IN user analytics to help improve Stirling-PDF
  • Added page counts to merge pdf tool
  • Major Enhancements to SAML2 and OAuth2 Integration with Simplified Security Configurations

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.29.0last year

This update includes several enhancements and bug fixes:

  • Added image support to multi-tool page
  • Added document splitting functionality to the multi-tools page
  • Introduced split PDFs by Chapters/Bookmarks feature
  • Added functionality to set font size and font type for page numbers
  • Enhanced metrics collection to include unique user counts
  • Fixed issues with multiple file uploads
  • Improved auto-rename functionality
  • Enhanced folder scanning for non-PDF files
  • Fixed font support for watermarks and other features
  • Resolved authentication issues
  • Updated translations for multiple languages

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.28.3last year

This update includes several enhancements and bug fixes:

  • Fixed issues with multiple file uploads
  • Improved auto-rename functionality
  • Enhanced folder scanning for non-PDF files
  • Fixed font support for watermarks and other features
  • Resolved authentication issues
  • Updated translations for Italian language

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.27.0last year

This update includes several enhancements and bug fixes:

  • Added a checkbox in WatermarkController to convert PDFs to PDF-images
  • Implemented multithreaded feature for image extraction, improving performance
  • Added highlight color selection for the Compare PDFs page
  • Added support for new languages including Thai, Irish, Danish, and Vietnamese
  • Updated translations for various languages
  • Fixed issues with synchronizing browser settings to the database
  • Addressed context path bugs
  • Added missing description for the Split function in the top bar

⚠️ Note: Calibre support (PDF to book, etc.) has been temporarily removed. If you need this feature, please use the previous version.

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases

Version 0.26.1last year

This update includes several enhancements and bug fixes:

  • Language updates for better localization support.
  • Improved compatibility with older Chrome versions.
  • Added Odd-Even operation mode for the organize feature.
  • Fixed issues with contextPath for root URI changes.
  • Corrected PDF to image conversion for different page orientations and sizes.

Full release notes are found at https://github.com/Stirling-Tools/Stirling-PDF/releases.

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