Reading two versions side by side takes time and lets things through. Services that do it online ask you to upload two documents — often the two versions of a contract, which is exactly what you do not want to hand over.
How it works
Drop your files on the page, or click to pick them from your folders.
Start the job. It runs inside your browser: nothing is sent to a server.
Download the result. No account, no watermark, no queue.
When this really helps
Check a returned contract
See what the other party changed before signing.
Follow a revision
Identify the paragraphs reworked between two versions.
Verify a reissue
Make sure a republished official document still says the same thing.
What the conversion keeps, and what it loses
Working inside a browser comes with limits a hosted service does not have. Here they are in plain words, so you know what to expect before you start.
What is kept
- Removed lines, marked with a minus
- Added lines, marked with a plus
- The page number of every difference
- The count of differing pages
What is not carried over
- Purely visual differences: font, colour, position
- Images and their content
- Word-level detail inside a line
- Scanned documents, for lack of text to compare
Worth knowing about the format
Comparison works on text, line by line and page by page. Pixels are not compared: two identical renderings can differ by antialiasing, and two visually similar pages can say opposite things. Meaning lives in the text.
Not the right tool?
- PDF → text — Pour extraire le texte complet plutôt que les différences.
- Scanned PDF to text — Deux scans doivent être reconnus avant d'être comparables.
- Merge PDFs — Pour réunir les deux versions dans un même dossier.
Why it's free
Online converters receive your file on their servers, process it, then promise to delete it. Every document costs them computing time: that is why they charge, and why they cap file sizes.
Here, the work happens on your own computer. The page contains no server code: your document cannot be received, because it is never sent. So there is nothing to bill, nothing to cap, and nothing to delete afterwards. Cut your connection once the page has loaded — everything keeps working.
Frequently asked questions
Can scanned documents be compared?
Not directly: an image holds no text. Run both files through character recognition, then compare the results.
Are layout differences shown?
No. The tool compares what is written, not how it is presented. A paragraph moved without being changed will not show as a content difference.
Are my two files sent anywhere?
Neither of them. Everything is read and compared in your browser — which is precisely what matters when comparing two versions of a contract.
Other tools
Edit the text in a PDF — Fix a line that is already written, even on a scanned document. This is the feature other services charge for, and the natural starting point when you need to retouch before converting.