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Hash Generator — Free Online Tool
A cryptographic hash turns any input into a fixed-length fingerprint. Change a single character of the input and the fingerprint changes completely, while the same input always produces the same output. This hash generator computes SHA-256 and SHA-512 digests using the Web Crypto API that is built into modern browsers, so it is fast, standards-compliant and does not send your text anywhere. Type or paste text, choose the algorithm and click Generate Hash to get a lowercase hexadecimal string: 64 characters for SHA-256 and 128 for SHA-512. Developers use hashes to verify file or message integrity, create cache keys, compare data without storing the original, build checksums for downloads and learn how digital signatures and blockchains work. Hashing is one-way, so you cannot reverse a hash back into the text, although common short inputs can be guessed with lookup tables. For that reason, plain SHA hashes are not suitable for storing user passwords; use a slow, salted algorithm such as bcrypt, scrypt or Argon2 on your server. The tool hashes text typed into the box rather than uploaded files, and it does not include older algorithms such as MD5 or SHA-1, which are considered unsafe for security purposes. Results appear in your browser only.
Use our Hash Generator on AllConvertor — no registration, no download, works on iPhone, Android, Windows, and Mac. All processing runs in your browser when possible for maximum privacy and speed.
How to use Hash Generator
- Select SHA-256 or SHA-512 from the algorithm dropdown.
- Type or paste the text you want to hash.
- Click Generate Hash.
- Copy the hexadecimal result for comparison or storage.
Key benefits
- ✓ 100% free — no paywall or trial limits
- ✓ No account or email required
- ✓ Mobile-friendly responsive design
- ✓ Instant results in your browser
- ✓ Secure — data stays on your device
- ✓ Trusted by thousands of users daily
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Frequently Asked Questions
How do I generate a SHA-256 hash?
Choose SHA-256, enter your text and click Generate Hash. The 64-character hexadecimal digest appears below.
Can a hash be decrypted?
No. Hashing is one-way. You cannot recover the original text from a hash, although weak or common inputs may be guessed.
Is SHA-256 good for storing passwords?
Not on its own. Passwords should be stored with a slow salted algorithm like bcrypt, scrypt or Argon2, not a plain SHA hash.
Does this tool support MD5 or SHA-1?
No. It offers SHA-256 and SHA-512, which are secure choices. MD5 and SHA-1 are considered broken for security uses.
Is my text sent to a server?
No. Hashing uses the Web Crypto API in your browser, so the text stays on your device.