1. 01Add one or more files and choose the algorithms.
2. 02Optionally paste the official MD5, SHA-1 or SHA-256; non-hexadecimal characters are stripped before comparing.
3. 03Wait for the serial computation, then read the match result or export the list.

One file can yield all three digests at once, and a pasted checksum is compared against each finished algorithm result as normalized lower-case hexadecimal.

• Above 500 MB with SHA-1 or SHA-256 enabled, the tool warns about whole-file memory pressure; chunked MD5 is not limited in the same way.
• Cancel clears the partial results of unfinished tasks; a SHA step that has already started cannot be interrupted and may run to completion, but its result is discarded.
• MD5 and SHA-1 are no longer suitable for collision-resistant cryptography; prefer SHA-256 for download integrity checks.
• A matching hash only means the byte digests agree; it does not prove the file comes from a trusted source or is free of malicious content.

• Checking the SHA-256 published on a software download page.
• Producing checksum lists for local files in bulk.

The file bytes and the computed digests are never sent over the network; the exported list is generated locally in the browser.