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Hash Generator — MD5, SHA-1, SHA-256, SHA-512

Generate 4 hash algorithms from text or files. Drag-and-drop file hashing. HMAC support. Compare hashes to verify integrity. 100% browser-based.

4 Algorithms File Hash HMAC Verify No Upload

Drop a file here or click to select

Your file stays on your device —nothing is uploaded

How it works

1. Enter text or drop a file

Type any text or drag-and-drop a file. Everything stays on your device.

2. Get 4 hashes instantly

MD5, SHA-1, SHA-256, SHA-512 – all generated at once. Copy any with one click.

3. Verify file integrity

Paste an expected hash and instantly see which algorithm matches. Confirm your download is safe.

Why use this hash generator?

File Hashing —Not Just Text

Most online hash tools only handle text. Ours supports drag-and-drop file hashing with a progress bar, so you can verify downloaded ISOs, installers, and archives without installing any software.

HMAC for API Authentication

Toggle HMAC mode, enter your secret key, and generate HMAC-SHA256 and HMAC-SHA512 signatures. Essential for API development and webhook verification.

One-Click Hash Comparison

Paste the expected hash from a download page and instantly see which algorithm matches. Green – for match, red – for mismatch. No manual eyeball comparison needed.

100% Private —No Upload

All hashing happens in your browser via the Web Crypto API. Your text and files never leave your device. No server, no database, no tracking.

Pro Tips

● Use SHA-256 for file verification —it’s the industry standard for checksums.
● MD5 is fast but not collision-safe. Use it for quick checksums, not for security.
● HMAC adds a secret key layer —essential for API signing and webhook verification.
● Hashes are one-way —you cannot reverse a hash back to the original text.
● Even a single character change produces a completely different hash —that’s the whole point.

Frequently Asked Questions

Everything you need to know about the hash generator.

What is a hash generator?

A hash generator converts text or files into fixed-length fingerprints using algorithms like MD5, SHA-1, SHA-256, and SHA-512. The same input always produces the same output, but even a tiny change produces a completely different hash.

What is the difference between MD5 and SHA-256?

SHA-256 produces a 256-bit (64-character) hash and is considered secure. MD5 produces a 128-bit (32-character) hash and is faster but vulnerable to collision attacks. Use SHA-256 for security; MD5 for quick checksums.

Can I hash files without uploading them?

Yes. ToolKnit processes files locally in your browser using the Web Crypto API. Your files never leave your device.

How do I verify a downloaded file?

Generate the file's SHA-256 hash, then compare it with the hash published by the source. If they match, the file is intact and has not been tampered with.

What is HMAC?

HMAC (Hash-based Message Authentication Code) adds a secret key to the hash. It is used for API authentication and verifying that a message was not altered in transit.

Is MD5 still safe to use?

MD5 is fine for non-security purposes like checksums and deduplication. For security-sensitive applications like password hashing or digital signatures, use SHA-256 or SHA-512.