Check File Integrity

Detect whether a file has changed or been corrupted.

Nid oes angen mewngofnodiMae ffeiliau'n aros yn breifat

Gollwng ffeiliau yma, neu cliciwch i bori

Any file dim cyfyngiad maint ffeil

Pori ffeiliau

Nid yw eich ffeiliau byth yn gadael eich dyfais. Mae'r holl brosesu yn digwydd yn lleol yn eich porwr.

Compute SHA-256, SHA-1, SHA-384, and SHA-512 checksums of any file — and verify a download against its published hash. The file is read locally and never uploaded.

integrity tips

🛡️

Save a file's hash now; re-hash later and compare to detect any change, even a single flipped byte.

💾

Useful for verifying backups and archives copied between drives or systems.

🔑

Four algorithms are computed so you can match whatever a source provides.

🔒

Runs entirely in your browser.

Sut Mae'n Gweithio

Dewiswch Ffeil

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lawrlwythwch

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Pam defnyddio ein un ni?

✓Hollol rhad ac am ddim - dim costau cudd, byth

✓Nid oes angen cyfrif, e-bost na mewngofnodi

✓Nid yw ffeiliau byth yn gadael eich dyfais

✓Dim cyfyngiadau maint ffeil o gwbl

✓Dim dyfrnodau ar unrhyw allbwn

Also check out…

✅

Verify a Download's Checksum

Confirm a downloaded file matches the checksum the

🔢

Get the SHA-256 of a File

Compute a file's SHA-256 hash to publish or compar

🔁

Confirm Two Files Are Identical

Hash two files and compare to see if they're byte-

📤

Publish a Checksum with Your File

Generate a checksum to list alongside a file you d

Cwestiynau Cyffredin

Back to File Hash / Checksum