SHA-256 Hash Online
SHA-256 is the digest people mean when they say “sha256 online”. This page hashes with Web Crypto, compares hex, and will only brute-force short strings. There is no SHA-256 decoder — the function is one-way.
Private by design. SHA-256 runs in this tab via Web Crypto — the input never leaves your device.
FreeNo sign-upRuns in your browserDeveloperApplication
How to get a SHA-256 hash
- Type or paste the input. The 64-character lowercase hex is computed in the tab.
- Compare if you have an expected value. Paste it in the compare box. Match / no match is the whole feature.
- Do not expect a decrypt. The invert tab is a short local search, not a rainbow table.
Frequently Asked Questions
- How do I decode SHA-256?
- You do not. You hash guesses until one matches. This page will try a dictionary and strings up to length 4. A real secret will not fall out.
- Is this the same as `shasum -a 256`?
- For UTF-8 text, yes — same digest. It is not a file hasher; drop a file into a terminal for that.
- Is my input uploaded?
- No. `crypto.subtle.digest("SHA-256")` runs in this tab.
Use Cases
- Hash an API token format you are documenting
- Check a published SHA-256 of a short string
- Show that “sha256 decoder” is a marketing name for guessing
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