How to use this tool
- Drop in the original PDF and the changed PDF.
- The comparison runs automatically once both are loaded.
- Added lines are highlighted green, removed lines red.
Frequently asked questions
- Does this compare layout and images, or just text?
- Just the text content, line by line — it won't catch a moved image or a formatting-only change with no text difference.
- Why does one small change show a lot of red and green?
- PDFs don't store explicit line breaks — this tool reconstructs lines from each piece of text's position on the page, which works well for normal documents but can shift line groupings if the layout changed significantly between versions.
- Are my PDFs uploaded anywhere?
- No — both files are read and compared entirely in your browser. Neither ever leaves your device.
How GetByteRush compares
Most free tools for this online work the same way: you upload your file to their server, wait, then download the result — which means your file (and often your email, for a "free" account) sits on someone else's infrastructure. Here's the actual difference:
| Feature | GetByteRush | Typical online tools |
|---|---|---|
| PDFs ever leave your device | No — compared in this tab | Yes, uploaded to process |
| Account required | Never | Often, past a certain usage level |
("Typical online tools" reflects publicly documented behavior of common free file-processing sites as of 2026 — always check a specific competitor's own privacy policy and pricing page, since these details change.)