Hash Checker

A hash checker (also called a hash verifier or hash comparator) computes the hash of an input string using a selected algorithm and compares it against a user-provided hash value. If the two match, the input is exactly what was originally hashed — no more, no less.

This is a fundamental building block of data integrity verification, password validation, and digital forensics. Instead of manually running a hash generator and comparing the output character by character, a hash checker does everything in one step.

• Password verification — You have a plaintext password and the stored hash. Quickly check that the user entered the correct password by hashing it and comparing.
• File integrity — A website provides an MD5 or SHA256 checksum for a downloaded file. Compute the file's hash on the command line, paste both into this tool, and confirm they match.
• Debugging & testing — Verify that your application's hashing logic produces the correct output for a known input. Useful when migrating hash algorithms or implementing authentication systems.
• Learning & education — Understand how different hash algorithms behave. Compare MD5 (fast, 128-bit) vs SHA256 (slower, 256-bit) by checking the same input against known hashes.

1. Enter the text — Type or paste the string you want to check into the input textarea.
2. Select the algorithm — Choose the hash algorithm that was used to produce the expected hash (e.g., MD5, SHA1, SHA256, SHA512).
3. Enter the expected hash — Paste the hash value you want to compare against.
4. Click "Check Hash" — The server computes the hash of your input and compares it to the expected hash. The result shows a green "Match" or red "No Match" badge.