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SHA-256 Hash Generator
⌃⏎ run · ⎋ clear · / focus input
⇅ drop a file to hash it
// about this tool

SHA-256 Hash Generator Online

Updated 2026-10-24

SHA-256 produces a 64-character hex digest and runs entirely in your browser, so sensitive input never touches a server. It's part of the SHA-2 family NIST introduced in 2001, and two decades later it's still the field's working default, the algorithm behind Bitcoin's proof-of-work, most TLS certificates, and the checksums package managers use to verify a download.

No practical collision against SHA-256 has ever been published, and none is expected with current or foreseeable computing power. If you're choosing a hash for anything security-relevant and don't have a specific reason to pick something else, this is the one to reach for.

// how to use

  1. 1 Paste or type your text into the input panel on the left.
  2. 2 The 64-character SHA-256 digest appears in the output panel on the right as you type.
  3. 3 Toggle the lowercase/uppercase option if you need the hex in a specific case.
  4. 4 Use the Copy button to grab the digest.

// examples

Hashing a short string
Input
hello
Output
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824
Hashing a sentence
Input
The quick brown fox jumps over the lazy dog
Output
d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592

// common uses

Verifying file and download integrity Content addressing and deduplication Building blocks for signatures and HMAC Checksums in build and CI pipelines

// faq

Is my text sent anywhere?
No. Everything happens in your browser's own crypto engine, the same algorithm it already runs constantly, invisibly, to verify TLS certificates on every HTTPS site you visit.
I already have a SHA-256 hash. How do I check what it is?
Paste it into our hash identifier, which recognises the algorithm from a digest's length and format (including Docker-style sha256: prefixes). To confirm a specific input produced it, hash that input here and compare the two strings; that is how checksum verification works.
Can a SHA-256 hash be reversed or decrypted?
No. SHA-256 is a one-way cryptographic hash, so a digest cannot be turned back into the original text. The only way to find a matching input is to hash candidates and compare.
What is the difference between SHA-256 and MD5?
Mainly two decades of cryptanalysis. MD5's shorter digest has had practical collisions since 2004, while nothing has broken SHA-256's since it was introduced, which settles which one to pick for anything that matters.
Is SHA-256 secure?
Yes. SHA-256 is part of the SHA-2 family and is widely used and trusted for integrity checks, digital signatures, and certificates. There are no known practical collision attacks against it.
When should I use SHA-256?
Use it whenever you need a secure fingerprint, whether for verifying downloads, checksums in pipelines, content addressing, or as a building block for signatures and HMAC.

↳ Curious to go deeper? Read the MD5 vs SHA-256 vs SHA-512: which hash to use guide →

// works with your data

Hash Identifier SHA-512 Hash Generator MD5 Hash Generator HMAC Generator Remove Extra Blank Lines Hash Generator

Use this via API

Get a free API key → 
curl -X POST https://thesnaptools.com/api/v1/tools/sha256 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"hello"}'