The fastest online hash and checksum calculator
AG HASH is a free tool that instantly computes the hash values you frequently need in development and security work — with no sign-up or installation.
From MD5 and CRC32 checksums to SHA-1, SHA-256, SHA-384, and SHA-512 secure hashes, everything is computed at once from a single input. In HMAC mode, you can add a secret key to generate a message authentication code.
You can hash not only text but also files by dragging and dropping them, and pasting an expected hash instantly shows which algorithm matches so you can verify download integrity. Uppercase output, individual and bulk copy, and .txt download are all supported.
Every hash is computed using only the browser's crypto.subtle and pure JavaScript, and no input, file, or key is ever sent to or stored on a server.
Widely used for verifying file integrity and validating downloads. Fast, but not cryptographically secure — use SHA-2 for security purposes.
SHA-256, 384, and 512 are secure hashes computed with the browser's standard crypto.subtle. Used for signatures, integrity checks, password storage, and more.
Computed with a secret key to verify that a message has not been tampered with. Turn on the HMAC chip and enter a key to switch the SHA family into HMAC mode.
No input, file, or key is ever sent to or stored on a server. Every hash is computed entirely inside your browser.
No. Every hash is computed using only the browser's crypto API and JavaScript, and no input, file, or HMAC key is ever sent to or stored on a server.
MD5 and CRC32 are still useful as file-integrity checksums, but they are not cryptographically secure. For security-critical signatures, passwords, and tokens, use SHA-256 or stronger.
On the File tab, upload the file, then paste the checksum provided by the source into the Verify box. The matching algorithm's row is highlighted green, confirming the file has not been corrupted or tampered with.