How it works
Complete the job in three clear steps
- Choose the PDF file or files from this device.
- Set the document options and run the operation locally.
- Review the result and download the generated file.
Advanced private PDF tool
Compare PDF Files Visually
Render two PDFs page by page, measure changed pixels, and download highlighted difference images in a ZIP archive.
Free to use Your PDF and generated output stay in this browser and are not uploaded to Lucaden.
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Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
Render two PDFs page by page, measure changed pixels, and download highlighted difference images in a ZIP archive.
Pixel comparison flags visual rendering differences, including antialiasing and font changes. It does not explain textual meaning or legal significance.
This is an independent Lucaden workflow using permissive browser libraries. Stirling PDF is credited only as a product-feature reference; its application code is not copied or embedded.
Included capabilities
- Page-count comparison
- Pixel-level change ratio
- Highlighted PNG differences
- Per-page summary report
Useful for
- Review revised contracts
- Check generated reports
- Compare print proofs
- Spot layout regressions
Questions
About this tool
Does Lucaden upload my PDF?
No. PDF.js and pdf-lib process the document in temporary browser memory on this device.
What should I verify?
Pixel comparison flags visual rendering differences, including antialiasing and font changes. It does not explain textual meaning or legal significance.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.