Compare PDF
Side-by-side document comparison to spot changes between versions.
Files stay on your device
Original file
or drop it here
Changed file
or drop it here
About Compare PDF
Use Compare PDF when you need to side-by-side document comparison to spot changes between versions. It takes two text-based PDF files (.pdf), and what downloads is a side-by-side view highlighting what was added, removed or changed. There's no queue and no watermark on the output.
How to compare pdf
- 1Open the file from your device, or drop it on the page.
- 2Check the options; change only what you need to.
- 3Run it, then check the preview before saving.
- 4Download the result.
Supported file types
Two text-based PDF files (.pdf).
You get back: A side-by-side view highlighting what was added, removed or changed.
Good to know before you start
- Comparison works on text, so moved images and restyled layouts are not reported.
- Two scans have no text to compare — OCR them first.
- Everything runs in your browser tab, so the practical size ceiling is your device's memory — a very large document is slower on a phone than on a laptop.
Why use this tool
Built for the actual task
Only the settings compare pdf needs are on the page, so there's nothing to wade through.
Standard output
The download is a side-by-side view highlighting what was added, removed or changed.
Free to repeat
Run it again with different settings if the first result isn't quite right.
Frequently asked questions
What do I need to use Compare PDF?
Two text-based PDF files (.pdf).
What does the download contain?
A side-by-side view highlighting what was added, removed or changed.
Is there a catch?
Two scans have no text to compare — OCR them first.
Can I use the result in another tool here?
Yes. Compressing, merging, splitting and converting all accept the file you just made.