Fingerprint File
Compute SHA-256, SHA-1 and byte size for any file, entirely on your device. Use it to prove a document hasn't changed or to compare two copies.
How to fingerprint file
- Choose your file. Files stay in this browser tab.
- Select Fingerprint File and download the result.
Local processing: document contents are handled on this device. Your hosting provider still receives ordinary web requests for the page and application files, but not the document you select.
Is Fingerprint File free?
Yes. There is no account, watermark, daily quota, or payment step.
Does my file get uploaded?
No. The selected file is read and processed by code running in this browser tab. The document bytes are not sent to PDF Pouch.
Is there a file size limit?
Yes. Safety limits prevent unusually large or complex files from exhausting your device memory. Individual files are limited to 100 MB and PDFs to 500 pages.