Hash Generator
Generate SHA hashes from text or files. Multi-hash, HMAC, file checksum, and compare.
Advanced — All algorithms · Uppercase Off · HMAC Off
What is Hash Generator?
A hash generator creates cryptographic checksums—fixed-length strings that uniquely represent your input. The same input always produces the same hash; changing even one character produces a completely different hash. Hashes are used for file integrity verification (did the download arrive intact?), password storage, digital signatures, and blockchain. This tool supports SHA-1, SHA-256, SHA-384, and SHA-512.
All hashing runs in your browser via the Web Crypto API. Your text and files are never uploaded to any server. You get three modes: Text for hashing strings, File for generating checksums of uploaded files, and Compare to verify two hashes match. Advanced options include HMAC mode for keyed authentication.
How to Use Hash Generator
- In the Text tab, type or paste your input and click Generate Hash or press Ctrl+Enter.
- With All algorithms enabled (default), you see SHA-1, SHA-256, SHA-384, and SHA-512 side by side. Uncheck it to hash with a single algorithm.
- In the File tab, upload or drag‑drop a file, then click Generate Checksum. Use this to verify downloads or compare files.
- In the Compare tab, paste two hashes and click Compare to see if they match.
- Open Advanced to enable HMAC mode and enter a secret key for keyed hashing. Use Copy All or Ctrl+Shift+C to copy all hashes. Press Esc to clear.
Tips & Best Practices
SHA-256 is recommended for most uses; SHA-512 offers stronger security. SHA-1 is deprecated for security-critical applications but still useful for non-security checksums. HMAC mode combines a hash with a secret key—useful for API signatures and message authentication. The Compare tab is case-insensitive. For file verification, ensure you use the same algorithm and format (hex) as the source (e.g. SHA-256 from a software vendor).
When to Use This Tool
Use this hash generator when you need to verify file integrity, generate checksums for documentation, or compare hashes. It's ideal when you want privacy—no uploads, no tracking. Choose it over command-line tools when you need a quick browser-based solution or when you're on a device without terminal access. For strong passwords, use our Password Generator; for encoding data, see our Base64 Encoder.
Frequently Asked Questions
What is a hash function?
A hash function converts input data into a fixed-length string (hash). The same input always produces the same hash. SHA-256 is a widely used cryptographic hash function.
What is SHA-256?
SHA-256 is a cryptographic hash function that produces a 256-bit (64 character) hash. Used for checksums, digital signatures, and blockchain.
What is HMAC?
HMAC (Hash-based Message Authentication Code) combines a hash function with a secret key to verify both data integrity and authenticity.
Is my text sent to a server?
No. The hash generator uses the browser's Web Crypto API. Hashing runs entirely locally; your text is never uploaded.
Which algorithm should I use?
SHA-256 is recommended for most uses. SHA-512 offers stronger security for sensitive data. SHA-1 is deprecated for security-critical applications. For strong credentials, try our Password Generator. For encoding data, see our Base64 Encoder.