Do you upload my files or text?

No. Hashing happens locally in your browser via the Web Crypto API (and a tiny MD5 fallback). Nothing is sent to any server.

Which algorithms are supported?

MD5 (fallback), SHA-1, SHA-256, SHA-384, and SHA-512. For HMAC, SHA-* uses WebCrypto; MD5-HMAC uses an in-page implementation.

Can I hash multiple files?

Yes. Drop multiple files and click “Hash files” to process them with a progress indicator.

HEX or Base64 output?

You can copy either HEX or Base64. Uppercase for HEX is available.

SHA-1 is considered broken for collision resistance. Prefer SHA-256 or stronger.

HelloTools.app

Hash Calculator

Compute MD5, SHA-1, SHA-256/384/512 for text and files — fully offline in your browser. Optional HMAC, HEX/Base64 output, and bulk file hashing.

Password Generator Slug Generator UUID Generator Random String

Need a different utility?

Text

Files

Drag & drop files here

or click to browse

Options

MD5 SHA-1 SHA-256 SHA-384 SHA-512

Output

Uppercase HEX

HMAC (optional)

HMAC works with SHA-* via WebCrypto; MD5-HMAC uses an internal fallback.

About hashing

Cryptographic hash functions map data to a fixed-size digest. They are commonly used for integrity checks and authentication (via HMAC). For new projects, prefer SHA-256 or stronger.

FAQ

Are my files secure?

Yes. Hashing occurs 100% locally — nothing is uploaded.

Why is MD5 still here?

MD5 is not collision-resistant; it remains useful for simple checksums. For security-sensitive use, prefer SHA-256 or better.