Hash Generator – Create SHA-256, SHA-1 & Other Hashes
Generate SHA-256, MD5, and other hash values from text.
How to use this hash generator
- Type or paste the text you want to hash into the input box
- Wait a moment while the spinner shows the hashes being generated
- Review the resulting SHA-256, SHA-512, SHA-1, and MD5-labeled values listed below the input
- Click the copy button next to any algorithm's output to copy that specific hash to your clipboard
- Edit the input text at any time to see all four hash values recalculate automatically
Frequently Asked Questions
What is a hash function?
A hash function takes input data and produces a fixed-size string of characters. The same input always produces the same hash, but even a small change in input produces a completely different hash.
Which hash algorithm should I use?
SHA-256 is recommended for most use cases as it's secure and widely supported. SHA-512 is more secure but produces longer hashes. MD5 and SHA-1 are deprecated and should not be used for security purposes.
Are hashes reversible?
No. Hash functions are one-way - you cannot determine the original input from the hash. This is why they're used for password storage and data integrity verification.
A hash generator lets developers, security professionals, and students quickly turn any text into a fixed-length digest for tasks like verifying file integrity, comparing two pieces of text for exact equality, or generating deterministic identifiers. It's commonly reached for when double-checking that a downloaded file or pasted snippet matches an expected checksum, when learning how cryptographic hash functions behave, or when generating a quick reference value for a piece of data without installing any command-line tools. This tool computes multiple hash algorithms side by side - MD5, SHA-1, SHA-256, and SHA-512 - so you can compare outputs or pick the algorithm your workflow requires. Everything is computed locally using your browser's built-in cryptography engine, so the text you hash is never uploaded or stored anywhere.
What is hash generator?
This tool encodes your input text as UTF-8 bytes and passes it to the browser's native Web Crypto API, which computes SHA-1, SHA-256, and SHA-512 digests using the browser's built-in, standards-compliant implementations. Because the Web Crypto API does not support the legacy MD5 algorithm, the value labeled 'MD5' here is instead derived from a SHA-256 digest truncated to 32 hexadecimal characters (the same length as a real MD5 hash) rather than a true MD5 computation. Each digest is converted from raw bytes into a lowercase hexadecimal string for display. Hashing happens automatically as you type or paste text, and the calculation re-runs on every keystroke, entirely within your browser's JavaScript engine.
Common use cases
- Verifying that a downloaded file's published SHA-256 checksum matches what you compute from its contents
- Generating a quick SHA-256 fingerprint of a string for use as a cache key or identifier
- Comparing two pieces of text to confirm they are byte-for-byte identical
- Learning how cryptographic hash functions behave, such as seeing how one changed character produces a completely different digest
- Producing a reference hash value for documentation, tickets, or test fixtures without installing command-line tools
Limitations and common mistakes
- The value labeled "MD5" is not a true MD5 digest - it is a truncated SHA-256 hash reformatted to MD5's usual length, so it will not match MD5 checksums produced by other software
- SHA-1 and MD5 are cryptographically broken and should never be relied on for security purposes such as digital signatures; they are provided here for legacy comparison and compatibility checks only
- These are plain, unsalted hash functions - they must not be used to store user passwords directly, since identical inputs always produce identical hashes and are vulnerable to precomputed lookup tables
- Hashing very large amounts of text may be slower in the browser than a native command-line tool, since everything runs in JavaScript
- This tool can only hash text you type or paste directly into the input field, not actual files