MD5 Hash
Generate an MD5 hash from any text in your browser. Produces the classic 128-bit message digest as 32 hex characters — fixed length regardless of input size. Useful for non-cryptographic checksums and cache keys. Note: MD5 is broken for security uses.
Text in, MD5 digest out
Every input — short or megabytes long — maps to exactly 128 bits (32 hex chars). One byte changes the entire output (avalanche effect).
Hello, world!
6cd3556deb0da54bca060b4c39479839
What MD5 is good for
MD5 stays popular as a fast, deterministic fingerprint for non-adversarial uses. Avoid it whenever an attacker could craft input.
Cache keys
Hash a long URL or query into a fixed-size key for filesystem or Redis caches.
ETag / dedupe
Detect when content has changed; pair with another check to avoid collisions.
Quick integrity
Spot accidental corruption in non-hostile transfers. Not safe against tampering.
Test fixtures
Generate deterministic IDs in tests and snapshot files.
How to generate an MD5 hash
Paste your text
Drop any text — UTF-8 is handled automatically.
Pick case
Lowercase is the default; some systems expect UPPERCASE.
Click Generate
Or leave auto-hash on for live updates as you type.
Copy or download
Grab the 32-char hex digest from the output panel.
Frequently asked questions
MD5 (Message Digest 5, RFC 1321) processes input in 512-bit blocks through four rounds of bitwise operations, producing a 128-bit digest. It is deterministic — same input always yields the same hash.
No — hashes are one-way functions. Short or common inputs may already be in rainbow tables, but there is no general "decryption" of an MD5 digest.
Usually whitespace or line endings (LF vs CRLF) in the input. Also confirm both tools use UTF-8 encoding for non-ASCII characters.
Yes. No signup, no limits, no ads. Everything runs entirely in your browser.
About MD5 hashing
MD5 (RFC 1321) is a widely deployed cryptographic hash function published by Ron Rivest in 1992. It compresses any input into a 128-bit (16-byte) digest, conventionally shown as 32 hexadecimal characters.
Properties
- Deterministic — same input always produces the same digest.
- Fixed-size output — 128 bits / 32 hex chars regardless of input length.
- Avalanche — changing one input bit randomises about half the output bits.
- Fast — gigabytes per second on modern CPUs.