MD2 is a cryptographic hash function designed by Ron Rivest in 1989 and published as RFC 1319. It produces 128-bit (32 hex) digests and was optimized for 8-bit computers. It is now completely broken.

Why is MD2 historically significant?

MD2 was the starting point of the Merkle-Damgard hash family. Studying MD2 helps understand how cryptographic hash functions evolved from MD2 to MD4, MD5, and eventually to the SHA standards.

No. MD2 has been deprecated for decades. It may appear in very old certificate chains, but all major standards bodies prohibit its use. It exists today only for academic study and legacy system analysis.

What is the output length of MD2?

MD2 always produces a 128-bit hash, displayed as 32 hexadecimal characters, regardless of input size.

Can I use MD2 for anything today?

No. MD2 should only be used for academic study or testing legacy system compatibility. For any real application, use SHA-256, SHA-3, or BLAKE3.

Tools

MD2|32 hex chars

Input

Output

Hash result will appear here...

0 chars|0 bytes

MD2 Hash Online — Legacy RFC 1319 Checksum Generator

Early cryptographic hash from RFC 1319 with 128-bit output. Broken by collision attacks — use only for legacy system compatibility and academic research.

Features

✓Compute MD2 hashes online — the original cryptographic hash from RFC 1319 (1989)
✓Real-time 128-bit hash computation with 32 hex character output
✓One-click copy, download as .txt, and uppercase/lowercase toggle
✓Understand hash algorithm history — MD2 inspired MD4, MD5, and the SHA family
✓Hash verification against known MD2 checksums
✓100% browser-based — all computation happens locally

How to Use

1Type or paste your text into the input box above.
2Your hash digest appears instantly — no page reload needed.
3Toggle UPPERCASE / lowercase to change the hex output format.
4Click the copy icon to copy the hash to clipboard, or use Download to save as .txt.
5Paste an expected hash into the Verify field to check for a match.

Frequently Asked Questions

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The global industry standard — powers Bitcoin, HTTPS certificates, and digital signatures worldwide. 256-bit output, 128-bit security. The most trusted SHA-2 variant by far.