Free Hash Calculator — Compute Hashes Online
Free online hash calculator. Compute MD5, SHA-256, SHA-384, and SHA-512 hashes from text or files, with optional HMAC.
About Free Hash Calculator — Compute Hashes Online
Hash Calculator computes cryptographic hashes for text and files right in your browser. Get MD5, SHA-256, SHA-384, and SHA-512 digests instantly, or add a secret key to compute an HMAC. It is perfect for verifying file integrity and checksums without uploading anything. It is completely free and runs entirely online — just open the page and start using it.
Features
- Compute MD5, SHA-256, SHA-384, and SHA-512 from text
- Hash any file to verify its integrity (SHA-256, with progress)
- Add a secret key to compute HMAC digests
- Live results with one-click copy
- Everything runs in your browser — no uploads
How to use Free Hash Calculator — Compute Hashes Online
- 1Switch between Text and File mode.
- 2Type your text, or select a file to hash.
- 3Optionally enter a secret key to compute an HMAC.
- 4Copy the hash you need from the results.
Frequently asked questions
- Are my files uploaded to compute a hash?
- No. Hashing runs entirely in your browser, so your text and files never leave your device.
- Which algorithms are available for files?
- File mode computes SHA-256 with a progress bar; text mode shows MD5, SHA-256, SHA-384, and SHA-512 together.
- What is HMAC used for?
- HMAC combines your data with a secret key to produce a keyed hash, often used to verify authenticity.