Visual Difference
Changed areas are painted over the page so you see edits at a glance, not just a yes or no.
Compare PDF
Compare two PDFs page by page and see exactly what changed. Drop both files and the differences are highlighted, with side by side and slider views. Free, no signup, nothing uploaded.
Guide
How to compare two PDFs
1
Add Both PDFs
Drop your original PDF in the first slot and the changed version in the second. Both files stay on your device.
2
Run The Compare
Click Compare. Each page is rendered and checked, and every page gets a status so you can spot what differs.
3
Review The Changes
Open any page in difference, side by side, or slider view. Adjust the sensitivity and download the view you need.
Spot Every Change Between Two PDF Versions
When a contract, design, or report goes through a few rounds of edits, it is easy to lose track of what actually changed. Reading both versions line by line is slow and you can still miss a moved figure or a swapped number. A visual compare renders both PDFs and checks them page by page, then highlights the exact spots that differ.
This tool draws each page of both files and compares them pixel by pixel. Changed areas are marked in red over a faded copy of the page, so edits stand out right away. You can switch to a side by side view to read both versions at once, or use the slider to wipe between the old and new page over the same spot. A sensitivity control lets you ignore tiny rendering differences or catch the smallest tweak.
It is useful for legal redlines, design proofs, invoices, and any document that has more than one version. Everything runs in your browser, so even private files stay on your own device and are never uploaded.
Benefits
Why Use Our PDF Compare Tool?
Side By Side And Slider
View the original and the changed version next to each other, or drag a slider to wipe between them.
Page By Page Status
A strip shows every page marked identical, changed, or present in only one file, with a percent changed.
Adjustable Sensitivity
Turn sensitivity up to catch small edits or down to ignore minor rendering noise.
Download The View
Save the highlighted difference of any page as an image for a report or a review.
Nothing Uploaded
Both PDFs are opened and compared in your browser. They are never sent to a server.
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FAQ
Frequently Asked Questions
Common questions about comparing PDFs.
How does the PDF compare work?
Both PDFs are rendered page by page and compared pixel by pixel. Areas that differ are highlighted, and each page is marked identical, changed, or present in only one file.
Does it compare text or the visual layout?
It compares the visual result, the way each page looks. That catches text edits, moved images, and layout changes alike, including formatting that a text-only compare would miss.
What if the two PDFs have different page counts?
Pages that exist in only one file are flagged so you know they were added or removed. The rest are compared in order.
Are my files uploaded?
No. Both PDFs are opened and compared entirely in your browser. Nothing is sent to a server, logged, or stored.
Why are small differences highlighted?
Two PDFs can render with tiny pixel differences even when they look the same. Lower the sensitivity to ignore that noise, or raise it to catch the smallest change.
Is this tool free?
Yes, it is completely free with no signup and no limits. Everything runs on your device.