Free SHA-256 & SHA-512 hash generator.
Hash text or files using SHA-256 and SHA-512 directly in your browser. Use the digests to verify integrity, compare values, or generate checksums—without sending any data to a server.
Secure hashes for everyday workflows
Hash functions like SHA-256 and SHA-512 are widely used for file integrity checks, API signatures, and password storage (when used with proper salting and key stretching on the server).
- Compute SHA-256 or SHA-512 hashes for any text input.
- Hash files locally for checksum verification.
- Get both hex and Base64 representations of the digest.
- Copy results in one click for use in code or tooling.
Note: Hashes here are for integrity and debugging. For password storage, always use server-side key-derivation functions (e.g. Argon2, bcrypt, PBKDF2), not raw SHA-256.
Generate SHA-256 / SHA-512 hashes
Hash text or files entirely in your browser using the Web Crypto API. Nothing you enter is uploaded or stored.
SHA-256 is widely used and usually sufficient. SHA-512 provides a larger digest size.
If both text and file are provided, the file takes priority.
Output includes both hex and Base64 digests.
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How it works
Client-side hashing with modern browser APIs.
This tool uses the Web Crypto API to compute hashes locally. Your text and files never leave your device, making it safe for quick checks and development.
1. Choose your algorithm
Select SHA-256 for a common, widely-supported hash, or SHA-512 for a larger digest size and more internal state.
2. Enter text or pick a file
Paste or type arbitrary text, or choose a file to generate a hash that represents its contents. Even a tiny change produces a completely different digest.
3. Copy the digest and compare
Copy the hex or Base64 hash output and compare against published checksums, logs, or other tools to confirm data integrity.
Hashing best practices
Know when hashes are enough—and when they aren't.
Hashes are great for checking integrity, but they don't provide confidentiality or full authentication by themselves.
Use hashes for integrity checks
Hashes are ideal for verifying that a file or message hasn't been modified—if you trust the source of the published hash.
Don't hash passwords directly
Passwords should be processed with slow, memory-hard algorithms like Argon2 or bcrypt on the server, not plain SHA-256/512.
For authenticity, use HMAC
To prove data came from someone who knows a secret, use HMAC (hash-based message authentication codes) rather than raw hashes.
Be careful with large files
Hashing very large files happens entirely in your browser and may be slow on low-powered devices. For huge artifacts, CLI tools might be more appropriate.
FAQ
Hash generator questions, answered.
Understand what these hashes tell you—and what they don't.
Is anything I hash uploaded or stored?
No. Text and files are processed locally in your browser using the Web Crypto API. We don't send or store any of your data.
What's the difference between SHA-256 and SHA-512?
Both are part of the SHA-2 family. SHA-256 outputs 256-bit (32 byte) digests, while SHA-512 outputs 512-bit (64 byte) digests and uses a larger internal state.
Why do I see both hex and Base64?
Hex is common in CLIs and many APIs. Base64 is more compact and is often used in JSON, URLs (with minor tweaks), and JWT-like formats.
Can I reverse a hash to get the original data?
No. Cryptographic hashes are one-way functions. While attackers can try guesses (brute force / rainbow tables), you can't simply “decrypt” a hash.
Hash Generator
Verify integrity in seconds
Compare hashes between this tool and your CLI or deployment pipeline to quickly spot unexpected changes or tampering.
Working with tokens or signatures too? Try our JWT decoder & generator or API key generator.