🧾

File Checksum

MD5 & SHA checksums of any file, with compare.

📁

Click to choose a file or drag & drop it here

Hashed locally with the Web Crypto API — the file never leaves your device

About the File Checksum

Compute MD5 and SHA-1/256/512 checksums of any file entirely in your browser and compare them against an expected value. The standard way to verify a download was not corrupted or tampered with — the file is read locally and never uploaded.

How to use the File Checksum

Drop any file into the zone; hashing starts immediately.
Wait a moment — MD5 and the SHA variants appear as they are computed.
Paste a known hash into the compare field to confirm the file matches.
A green note means the hash matches; red means the file differs or is corrupted.

File Checksum FAQ

Which hash should I use to verify a download?

SHA-256 is the current standard and what most project pages publish. MD5 and SHA-1 are shown for compatibility with older checksum lists but should not be trusted for security on their own.

How large a file can I hash?

The file is read into memory, so the practical limit is a few hundred megabytes depending on your device. Bigger files may fail with an out-of-memory message.

Is hashing done locally?

Yes — MD5 runs through js-md5 and the SHA family through the browser’s Web Crypto API. The file’s contents never leave your machine.