Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files. All processing happens in your browser using the Web Crypto API.
Features
Multiple Algorithms
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes simultaneously with a single click.
Text Hashing
Enter or paste any text and instantly compute its cryptographic hash values.
File Hashing
Select any file from your device to compute its hash without uploading it anywhere.
Web Crypto API
Uses the browser's built-in cryptographic functions for fast, secure hash computation.
Copy to Clipboard
Copy individual hashes or all results at once with a single click.
100% Client-side
All hashing is performed locally in your browser. No data is ever sent to a server.
About Hash Generation
A cryptographic hash function takes an input of any size and produces a fixed-length output called a hash or digest. Even a tiny change in the input produces a completely different hash, making these functions essential for data integrity verification, digital signatures, password storage, and checksum validation.
The SHA-2 family (SHA-256, SHA-384, SHA-512) is the current standard recommended by NIST for most security applications. SHA-256 produces a 256-bit (32-byte) hash typically used for certificates and blockchain. SHA-512 produces a 512-bit hash offering higher security margins. SHA-1, while no longer recommended for security-critical applications, is still used for legacy compatibility and non-security checksums.
This tool uses the Web Crypto API built into modern browsers, which provides hardware-accelerated cryptographic operations. Your text and files are never uploaded anywhere — all computation happens locally on your device.
Frequently Asked Questions
What is the difference between SHA-256 and SHA-512?▼
SHA-256 produces a 256-bit (64 hex character) hash while SHA-512 produces a 512-bit (128 hex character) hash. SHA-512 offers a higher security margin and can be faster on 64-bit processors.
Is SHA-1 still secure?▼
SHA-1 is no longer considered secure for cryptographic purposes due to demonstrated collision attacks. It is still useful for non-security checksums and legacy compatibility but should not be used for digital signatures or password hashing.
Can I hash large files?▼
Yes. The file is read entirely into memory as an ArrayBuffer. Very large files (multiple GB) may be limited by your browser's available memory.
Are my files uploaded to a server?▼
No. All hashing is performed entirely in your browser using the Web Crypto API. Your files and text never leave your device.
Why do the same text and file produce different hashes?▼
They use different input data. A text string is encoded as UTF-8 bytes, while a file contains its raw binary content. Even the same text saved as a file may include a BOM or trailing newline that changes the hash.