SHA-256 Hash Generator
Last updated: 2026 · Free online tool
What is SHA-256 Hash Generator?
Free online SHA-256 hash generator that computes secure SHA-256 digests from text or uploaded files using the Web Crypto API, supports HMAC-SHA256 with a secret key, and lets you verify hashes by comparison.
How to Use
- 1 Select Mode — Choose between SHA-256, HMAC-SHA256, and verification mode.
- 2 Enter Text — Enter text or upload a file.
- 3 Additional Input — In HMAC mode, enter the secret key. In verification mode, enter the hash to compare.
- 4 View Result — Review the hash result and copy it.
Related Tools
MD5 Hash Generator Free online tool to generate MD5 hashes from text or files with a pure JavaScript implementation based on RFC 1321, for integrity checks and data verification.
Password Generator Free online password generator that creates cryptographically secure random passwords using crypto.getRandomValues, measures entropy strength in bits, excludes ambiguous characters, and supports bulk generation from 4 to 128 characters.
Frequently Asked Questions
It is used in file integrity verification, digital signatures, blockchain, API signing, and various other security-critical applications.
A message authentication code using a secret key. It is used for API webhook signature verification and more.
Yes. The built-in Web Crypto API generates hashes with native performance.
SHA-256 produces a 256-bit (64 hex character) hash and has higher collision resistance than MD5, making it suitable for security purposes.
No. All computation is processed in the browser via Web Crypto API.