Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files, entirely in your browser.
Compute a cryptographic hash of any text or uploaded file using SHA-1, SHA-256, SHA-384, or SHA-512, using the browser's native Web Crypto API. Useful for verifying a downloaded file's integrity against a published checksum, generating a fingerprint for deduplication, or producing a hash for a config file or API signature. Hashing runs locally, so files never leave your device even though the computation is happening right in the page.
Runs on your device. This tool processes your file inside this browser tab. Nothing is uploaded, so it also works offline once the page has loaded, and closing the tab discards the file from memory.
Loading tool
How it works
- 01
Paste text or upload a file.
- 02
Choose a hash algorithm (SHA-1, SHA-256, SHA-384, or SHA-512).
- 03
Copy the generated hash to compare or use elsewhere.
Details
- Category
- Developer & data
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-12
Common questions
Which algorithm should I use?
SHA-256 is the standard default for checksums and integrity verification. SHA-1 is weaker and mainly useful for legacy compatibility.
Can I hash a whole file, not just text?
Yes - upload any file and its full contents are hashed, useful for verifying downloads against a published checksum.
Is this reversible - can I decode a hash back to the original?
No. Hashing is one-way by design; there's no way to recover the original input from the hash.
Is my file uploaded anywhere?
No - hashing runs locally via Web Crypto.
Use this from your code
This tool is also a REST endpoint, so you can run it in a pipeline instead of by hand. It is free and needs no API key. See the API reference for every parameter.
curl -X POST https://fileoven.com/api/v1/tools/hash-generator \
-H "Content-Type: application/json" \
-d '{"text":"hello world"}'