How to Compare Two PDF Files for Differences
Trying to find what changed between two versions of a contract or document? Comparing them by eye is slow and easy to miss. KOIAE's Compare PDF tool highlights the differences for you — free.
How to compare two PDF files
- Open the Compare PDF tool. Go to the KOIAE Compare PDF page.
- Upload both PDFs. Add the two versions you want to compare.
- Compare the files. KOIAE highlights exactly what changed between them.
- Review the differences. See the changes clearly so nothing slips past.
Tips for the best results
- Perfect for checking contract or agreement revisions.
- Compare an old and new version to confirm edits.
- Works best on text-based PDFs.
Why use KOIAE Compare PDF?
KOIAE Compare PDF is completely free — there is no account to create, no watermark on your files and no daily limits for everyday use. Most processing happens right in your browser, so your documents stay private, and it works on any device from Windows and Mac to Android and iPhone.
Frequently asked questions
What does it highlight?
It shows the text differences between the two documents.
Do both files need to be similar?
They should be two versions of the same document for the clearest results.
Is it free?
Yes, with no watermark.
Related tools: Merge PDF · Extract Text · Repair PDF · All PDF tools