Spot every change between two PDF versions — differences are painted red on a page-by-page diff. Free in your browser — no sign-up, no watermarks.
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Someone sends back "the same document with small changes" — and you need to know exactly what moved. Add the original and the revised file, and each page pair is compared pixel by pixel: unchanged content is dimmed to gray, every difference is painted red. Perfect for contract revisions, form updates and layout checks.
PDF is the universal document format: it locks layout, fonts and images so a file looks identical on every device and printer. Scans, invoices, forms, e-books and reports all travel as PDF. Because a PDF is a container rather than an image, turning its pages into JPG or PNG pictures — or bundling pictures into a PDF — are among the most common file tasks there are.
PNG is a lossless image format that preserves every pixel exactly as it was saved. It supports full alpha transparency, which makes it the standard for logos, icons, screenshots and any graphic that must keep sharp edges and clean text. PNG files are larger than JPG for photos, but they never lose quality no matter how many times they are re-saved.
“Same document, minor updates” is a claim, not a fact. This tool renders both PDFs and compares every page pair pixel by pixel, producing difference images where changes glow against the unchanged content — catching not just edited sentences but the changes text-diffing misses entirely: an adjusted number in a table, a swapped logo, a shifted layout, a figure quietly replaced.
Load the original first, the revised version second, and read the output like an X-ray: dark pages are identical, highlighted regions are your review list. It’s the fast answer for contract redlines nobody tracked, invoice “corrections,” updated spec sheets and any before/after where trust needs verification. Pixel comparison is thorough by nature — even a small font substitution lights up, which is precisely the kind of silent change worth noticing.
Yes — completely free, with no sign-up, no watermarks and no daily quota. Processing happens in this browser, so the practical limit is the memory available on your device.
Compare works on exactly two files at a time — the original and the revised version. To check several revisions, run the comparison once per pair.
Visually: each page pair is rendered and compared pixel by pixel, so any change — text edits, moved images, layout shifts — shows up in red on the diff image. It is a visual comparison, not a word-by-word text diff, which also means it works on scanned documents.
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