How to Compare Two PDFs Side by Side Online for Free
Need to compare two PDF versions to spot differences? This guide shows you how to compare PDFs online for free—open two documents side by side with sync scroll and zoom, then review visually. All processing runs in your browser. We cover compare pdf, compare two pdfs, and when a side-by-side view helps. No sign-up, no watermarks.
At a glance
Files stay on your device
View both together
Processed in your browser
No sign-up, no watermarks
Why Use Our Free Compare PDF?
Spot Differences Between Two PDFs
Have two versions of a contract or report and need to see what changed? Our Compare PDF tool opens two documents side by side with synchronized scrolling and zoom so you can read both at once and spot edits, new clauses, or missing text. Files stay on your device.
Compare pdf and compare two pdfs online for free.
Premium Features, Zero Cost
We offer the same powerful engines as paid software, but completely free and directly in your browser.
Sync Scroll
Scroll one document and the other follows.
Zoom Lock
Match zoom level on both sides.
100% Private
Both files are processed in your browser only.
How It Works Under the Hood
Why Side-by-Side Helps
Comparing two PDFs visually with sync scroll makes it easier to spot changes than flipping between tabs. Your files stay on your device—compare pdf and compare two pdfs stay private.
How to Use Compare PDF in 3 Simple Steps
1. Upload Both PDFs
Open the Compare PDF tool and add your first PDF (e.g. original), then the second (e.g. revised). Both files are read on your device only. If either is password-protected, unlock with our Unlock PDF tool first.
2. View Side by Side
View both documents side by side. Scroll one and the other follows (sync scroll). Zoom is often linked so detail levels match. Manually inspect for text changes, layout differences, or missing content.
After comparing, you can merge or edit with our Merge PDF or PDF Editor tools.
3. No Download Needed
This tool is for viewing and comparing. If you need to keep one version, download it from the interface. To protect a file after choosing, use Protect PDF.
Who Is This Tool For?
Contracts
Check that the counter-party did not change clauses.
Design Proofs
Compare V1 and V2 to confirm feedback was applied.
People Also Ask
How do I compare two PDFs for free?
Use MyPocketPDF Compare PDF. Upload both files and view them side by side with sync scroll.
Learn more →Does it highlight changes automatically?
This is a side-by-side viewer for manual comparison. Automated diff highlighting may come in a future update.
Learn more →