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A quick way to understand who this helps, what it solves, and where it connects next.
People reviewing contracts, revisions, proofs, and document updates page by page.
Quick on-screen PDF diff checks before approval, client handoff, or internal review.
Capture compare-PDF demand with a browser-first diff tool that keeps expectations realistic and useful.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
To compare two PDFs, upload both files and the tool aligns them page by page. It first checks the selectable text on each page to detect wording changes. When the text matches, it can still run a rendered-page comparison to catch visual changes — layout shifts, images, or formatting — that the text layer alone would miss.
It also identifies pages that were added or removed between the two versions. That makes Compare PDF practical for reviewing revisions, contracts, and proofs, even though it is not a full semantic contract-diff engine. The entire comparison happens in your browser, so both documents stay on your device.
Compare PDF presents the differences on screen rather than exporting an annotated diff PDF, so it is built for quick review rather than producing a redlined deliverable. Text comparison is strongest when both files contain real selectable text.
For scanned PDFs that are essentially images, the tool can still run visual page checks, but the text diff is most reliable when a text layer exists. Because everything is local and free, you can compare sensitive documents without uploading them anywhere.
Short answers for the questions people usually have before trying a utility like this.
Yes. This tool is free to use with no sign-up, and it runs entirely in your browser.
No. Both PDFs are compared locally in your browser, so the files stay on your device.
No. This version provides on-screen analysis only, so it shows the differences rather than producing a redlined file.
It can still run visual page checks on scanned PDFs, but the text diff is strongest when the pages contain selectable text.
It detects changed text, visual differences on a page, and pages that were added or removed between the two documents.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Check text changes, added pages, removed pages, and visual differences without exporting the documents to a server.