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PDF checksum

Calculate a checksum from the original PDF bytes, or compare one you already have.

Drop your PDFs here

PDF files · up to 50 MB each

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Processed on your device.

Saved workspaces on this device

Files are saved only when you choose Save. Up to 5 workspaces and 200 MB total. Browser storage may be cleared; download important files separately.

    How it works

    1. 1Choose your PDF file.
    2. 2Paste an expected checksum if you have one.
    3. 3Copy the checksum or download a report.

    Your original PDF stays unchanged. Save the TXT result before leaving. Size and checksum tools read file bytes; text tools read selectable page text without changing form fields.