Initializing secure environment…
Initializing secure environment…
Open two PDFs side by side with synchronised scrolling, so a revised contract lines up against the previous version and every changed page is obvious. Added and removed text is highlighted, page counts and metadata are compared, and a difference list is generated so you can jump straight to what changed. Both files open locally and are never uploaded, which is what makes it safe to compare a draft contract under NDA. No sign-up, no watermark, and it works offline.
To compare two PDFs free, add both files and they open in a synchronised side-by-side viewer. Changed text is highlighted, metadata and page counts are compared, and you can jump to each difference. Nothing is uploaded, no sign-up.
Put your version on the left and theirs on the right. Text-level differences are highlighted, so the changed clauses surface without reading both documents twice. Then read the surrounding context for each change — a highlighted word in a clause you have already agreed can still matter enormously.
Re-saving rewrites the document structure and usually the timestamp, so two files with identical visible content can differ in the comparison. If you are chasing a phantom difference, open both and look: if the text is identical, the difference is structural and can be ignored.
Compare your redlined version against the original, so you can see your own changes and theirs in one place before it goes back. It catches the clause you edited twice and the one you forgot entirely, which is a genuinely common failure with long documents.
OCR the scan first, then compare. The result will show OCR errors alongside real changes, which is why you compare against the typed original rather than assuming the differences are all substantive. The comparison is a way to direct your reading, not a substitute for it.
By comparing the extracted text of corresponding pages, with a per-page similarity score. Highlighting marks text added or removed on that basis, so it is a text comparison rather than a pixel one — a page that looks identical but was re-encoded identically will show as unchanged, which is correct.
The comparison pairs pages as far as it can and reports the surplus. A document that gained a page shows the new page as an addition rather than shifting every subsequent comparison, so an insertion does not make the rest of the document look rewritten.
Font, size and colour changes are reported at page level as a change, but they are not itemised the way text edits are. A redline where wording is identical and only a font changed will show a modified page and no highlighted text. For pure layout review, the side-by-side view is the tool.
Two at a time, which is the comparison that matters. For a third version, compare the newest against the previous one rather than trying to see all three at once — differences compound and the result is harder to read than a sequence of pairwise comparisons.
Only if both have a text layer. OCR both first; comparing two scans with no text means comparing nothing, since there are no characters to compare. The side-by-side view still lets you look at them, which is worth doing regardless.
No. Both files are opened in this tab and the comparison exists only while the tab is open. There is no account and no history.
The metadata panel shows the creation and modification dates recorded in each file, which is a strong hint. It is a hint rather than proof — metadata can be wrong, edited or absent, and a file's timestamp is not a reliable version indicator.
Yes. Free, no account, no watermark, and no upload. Comparing two versions of a contract is not something that should involve a third party's server.
More ai & smart tools — all free, no upload.