Hash Generator
Generate MD5, SHA-256 and other hash digests of any text online. Pick an algorithm in the live tool below — every digest is computed locally in your browser, nothing is uploaded.
About this tool
- What is it?
- DataFormatter Hash Generator is a free online tool that computes MD5, SHA-1, SHA-2 and SHA-3 checksum digests of any text.
- Who is it for?
- Developers verifying file integrity, generating digests for webhooks or comparing checksums without reaching for a command line.
- What makes DataFormatter's tool different?
- Every digest is calculated locally in your browser, so sensitive input is never uploaded — and the full SHA-3 family is supported.
Manual tool: SHA-256 Hash — auto-detection is disabled.
Input
0 chars · 0 words · 0 linesPaste or type JSON, Base64, or plain text…
Paste or click a sample above — it will be detected automatically.
Quick start
- Paste or type the text above — SHA-256 is selected by default.
- The hex digest updates instantly as you edit.
- Switch algorithms any time from the tool menu; Copy grabs the digest.
What is a hash?
A hash function converts input of any size into a fixed-length fingerprint called a digest. The same input always produces the same digest, while changing even one character produces a completely different one. Hashes are one-way — you cannot recover the original text from the digest.
Hello, DataFormatter!6c074e71…(64 hex characters)How to generate a hash online
- Paste your text into the editor above — SHA-256 is selected by default.
- Switch algorithms from the tool menu for MD5, SHA-1, SHA-2 or SHA-3 variants.
- The hex digest appears instantly; copy it with one click.
- Hashes are computed locally — sensitive input never leaves your machine.
Where checksums matter day to day
Verifying downloads
Publishers post SHA-256 checksums next to releases. Hash the file's text content or manifest here to confirm what you received is what was shipped.
Cache keys & deduplication
Long payloads make unwieldy cache keys. A SHA-256 digest gives you a fixed-size fingerprint that changes whenever content does.
Comparing without exposing
Need to know if two texts match without pasting either into chat? Compare their digests instead — identical inputs always produce identical hashes.
Choosing an algorithm
| Algorithm | Digest length | Status today |
|---|---|---|
| MD5 | 128-bit | Broken for security — acceptable for legacy checksums only |
| SHA-1 | 160-bit | Collision attacks demonstrated — migrate away |
| SHA-256 / SHA-512 | 256 / 512-bit | The current standard for integrity — also used inside JWT signing (HS/RS families) |
| SHA-3 family | 224–512-bit | Modern alternative with a different internal design than SHA-2 |
When hashes don't match
My digest differs from the published checksumWhy: Hidden byte differences: editors appending a trailing newline, Windows CRLF line endings, or BOM characters at the start of a file.
Fix: Strip the final newline (Restore Original helps compare), normalise line endings, then re-hash. The input must match byte-for-byte.
Hash matches locally but not in productionWhy: One side is hashing raw bytes while the other hashes a hex string of those bytes, or encodings differ (UTF-8 vs UTF-16).
Fix: Confirm both sides operate on identical UTF-8 bytes before hashing, then compare hex-to-hex.
Pro tips
- Generate strong passphrases to protect hashed archives with the Password Generator in String Functions.
- Need unique identifiers rather than fingerprints? The UUID Generator produces collision-resistant IDs.
- Split view lets you keep reference text and candidate variants visible while checking digests.
- Share links encode workspace state — useful for showing a colleague exactly which input produced a digest.
Hashing glossary
- Checksum
- A digest published alongside data so recipients can verify integrity. Recompute the hash of what you received and compare: matching digests mean the bytes survived transport unchanged.
- Digest
- The fixed-length output of a hash function, usually written as hexadecimal. SHA-256 digests are 256 bits — 64 hex characters — regardless of whether the input was one word or a whole book.
Frequently asked questions
Which hash algorithms are supported?
MD5, SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 (the SHA-2 family), plus the newer SHA-3 family: SHA3-224/256/384/512 and the shorter SHA-512/224 and SHA-512/256 variants.
Which algorithm should I use?
SHA-256 is the safe default for checksums and integrity checks. MD5 and SHA-1 are fast but cryptographically broken — fine for non-security deduplication, not for verifying untrusted data.
Can I use this to store passwords?
No. Plain hashes are designed to be fast, which makes them weak against brute force. Use a dedicated password hashing scheme such as bcrypt, scrypt or Argon2 in your application.
Why does my hash differ from another tool's?
Almost always hidden input differences: a trailing newline your editor added, CRLF instead of LF line endings, or comparing a hex digest against raw bytes. Match the exact input bytes first.
Is it safe to hash secrets here?
Hashing runs entirely in your browser — nothing is transmitted. Still, as with any browser tool, avoid processing credentials that would be catastrophic if exposed on a shared screen.