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Generate secure SHA and HMAC hashes for text and files entirely in your browser.
Need to generate a secure hash for text or verify file integrity? Our Cryptographic Hash Generator allows you to calculate SHA hashes and HMAC signatures directly inside your browser.
No Uploads
Processed in memory
Zero Telemetry
Private by design
WebCrypto API
High performance
A cryptographic hash is a one-way mathematical function that converts input data into a fixed-length string. Even a small change in input creates a completely different hash.
This property makes hashes essential for password storage, file integrity, digital signatures, and blockchain systems.
HMAC stands for Hash-based Message Authentication Code. Unlike a normal hash, HMAC uses both a message and a secret key, creating a signature used to verify authenticity. HMAC verification is standard across Amazon Web Services (AWS), Stripe, and GitHub integrations.
Download a Linux ISO, generate its SHA-256 hash here, and compare it with the official checksum to ensure your file hasn't been tampered with.
| Algorithm | Best For |
|---|---|
| SHA-256 | General purpose industry standard |
| SHA-512 | High-security environments |
| SHA-1 | Legacy systems only (Not recommended) |
Yes. It uses the WebCrypto API built natively into modern browsers. No data ever leaves your device.
No. File processing happens locally using the FileReader API and memory hashing. No uploads involved.
For testing, yes. For production server-side storage, use dedicated algorithms like bcrypt or Argon2.
Check your encoding (UTF-8), trim extra spaces, and ensure the input string is identical to the letter.
The Developer's Choice
We built this tool for developers, security professionals, and privacy-conscious users who need client-side cryptographic processing without complicated software downloads.