Hash & UUID

Generate SHA-256/512, MD5 hashes and bulk UUIDv4 values.

Algorithms

⬆ Drop file here or click to browse Any file type · up to 200 MB

What is this hash and UUID generator?

This free tool generates SHA-256, SHA-512 and MD5 hashes from text or files and produces bulk RFC 4122 UUIDv4 identifiers, computing everything in your browser with nothing uploaded.

How do I generate a SHA-256 hash or a UUID online?

Type text or drop a file to get its SHA-256, SHA-512 or MD5 hash instantly, or switch to the UUID tab to generate one or many UUIDv4 values — all locally in your browser.

Key features

Multiple algorithms
Compute SHA-256, SHA-512 and MD5 side by side from the same input.
Hash text or files
Hash a string, or drop a file up to 200 MB, to verify downloads and data integrity.
Bulk UUIDv4
Generate one or hundreds of cryptographically random RFC 4122 UUIDs at once.
Local & private
Hashing uses the Web Crypto API on your device, so inputs never leave your browser.

How to use it

Choose Hash Text, Hash File or UUID Generator. For hashing, enter text or drop a file and the SHA and MD5 digests appear instantly. For identifiers, set how many UUIDs you need and click Generate, then copy the results.

Frequently asked questions

Are my files or text uploaded to hash them?

No. SHA-256 and SHA-512 use the browser's Web Crypto API locally, so files and text are never sent anywhere.

Are the UUIDs truly random?

Yes. They are version-4 UUIDs built from the browser's cryptographically secure random number generator, per RFC 4122.

Should I still use MD5?

MD5 is fine for non-security checksums but not for security; prefer SHA-256 when integrity against tampering matters.

Toolbox computes SHA digests with the browser's native Web Crypto implementation and generates UUIDs to the RFC 4122 standard, so values interoperate with your backend and command-line tools.