Compare Two PDFs Online Free — Spot the Differences
All tools together in one workspace. Drop a PDF (or a few) to begin.
Original PDF
Click to choose, or drop it here
Revised PDF
Click to choose, or drop it here
How to compare two PDFs online
- Choose your Original PDF and your Revised PDF.
- VitePDF renders every page from both and checks them pixel by pixel — this starts automatically once both files are chosen.
- The sidebar lists every page that differs, so you can jump straight to it instead of clicking through the whole document.
- Switch between Differences, Original, and Revised to see exactly what changed on any page.
Why use VitePDF
- Catches any visual change — text edits, moved content, added or removed images, formatting tweaks — because it compares how the page actually looks, not just its underlying text.
- Pages added or removed entirely are called out clearly, not silently skipped.
- Everything happens in your browser — neither PDF is ever uploaded anywhere.
Frequently asked questions
Does this show exactly which words changed?
Not word-for-word — this is a visual comparison, so it highlights the regions of the page that look different rather than producing a text diff. It's very good at telling you where something changed; for exactly what changed in the text, switch to the Original/Revised tabs and read the highlighted area.
What if the two PDFs have a different number of pages?
VitePDF compares page 1 to page 1, page 2 to page 2, and so on. Any extra pages at the end of the longer document are shown as "only in Original" or "only in Revised" rather than compared against nothing.
Why does a page show as different when I can't see any change?
Very small rendering differences (slightly different fonts, anti-aliasing, or a barely-shifted line) can register as a small percentage of pixels differing. Use the Original/Revised tabs to compare directly if a highlighted difference looks larger than it should.
Is there a file size limit?
Files up to 280 MB are free — Premium removes that limit entirely.
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