What you provide
Two unlocked PDFs selected together, no larger than 10 MB combined and no more than 500 pages each.
PDF and document workbench
See text-layer differences between two PDFs.
Extract readable text from document A and document B, calculate similarity and create a PDF report with changed-context lines.
Exactly 2 unlocked PDFs10 MB combined limitPDF comparison report
Drop zone ready10 MB combined
Drop both PDFs together
Choose exactly two unlocked PDFs in A-then-B order for a bounded comparison.
Files are sent only when you run the tool; no server-side job history is created.
Product contract
Understand Compare PDF before processing
Extract readable text from document A and document B, calculate similarity and create a PDF report with changed-context lines.
What you receive
One _nirmion_tools_comparison.pdf report with page counts, text similarity and up to 2,000 changed-context lines.
What to review
This is not a visual, pixel, font, image, geometry, annotation or hidden-layer comparison. Reading order and OCR quality affect results.
Workflow
From source to checked download
The workspace checks files and processor readiness before enabling the operation.
Two unlocked PDFs selected together, no larger than 10 MB combined and no more than 500 pages each.
Place the earlier document first and the document to check second. No additional comparison setting is required.
Use the report to locate likely text changes, then open both sources side by side for a visual and structural review.
Common uses
When Compare PDF is useful
See text-layer differences between two PDFs.
Review wording changes between two contract drafts.
Check whether a revised policy changed readable clauses.
Create a quick change map before a detailed document review.
Important boundary
Similarity is not proof of document equality.
Two PDFs can extract the same text while differing in layout, images, signatures, attachments or hidden content.
Practical help
Questions before you run it
Does it compare images?
No. The report compares extracted text only.
Which file is document A?
The first displayed selection is A and the second is B.
Why can reading order look unusual?
PDF text is stored by coordinates, so extraction order can differ from the visible layout.
Document workflow
Use Compare PDF online with a bounded local API.
Extract readable text from document A and document B, calculate similarity and create a PDF report with changed-context lines. Two unlocked PDFs selected together, no larger than 10 MB combined and no more than 500 pages each.
One _nirmion_tools_comparison.pdf report with page counts, text similarity and up to 2,000 changed-context lines. This is not a visual, pixel, font, image, geometry, annotation or hidden-layer comparison. Reading order and OCR quality affect results. After download, the form resets and three tab-memory results remain available for re-download.