MD5 Hash Checker
Generate and verify MD5 checksums from text.
About This Tool
The MD5 Hash Checker generates MD5 checksums from text and verifies whether a string matches a given hash. MD5 produces a 128-bit (32 hex character) hash widely used for file integrity checks and checksums.
All hashing runs entirely in your browser via the CryptoJS library — no data is sent to a server. This makes it safe for sensitive strings during development or testing.
How to Use
- Select the Generate tab to create an MD5 hash from text.
- Type or paste your text, choose uppercase or lowercase, then click Generate MD5.
- To verify, switch to the Verify tab.
- Enter the original text and the known MD5 hash, then click Verify to check for a match.
Use Cases
System administrators verify file downloads by comparing published MD5 checksums. Developers use MD5 to generate Gravatar profile picture URLs based on email addresses. QA engineers use MD5 to fingerprint API responses and detect unexpected changes.
FAQ
- Is MD5 safe for passwords? No. MD5 is fast to compute, making it vulnerable to brute-force attacks. Use bcrypt, scrypt, or Argon2 for passwords.
- Why does the same text always produce the same hash? Hash functions are deterministic: the same input always produces the same output, which is why they work for checksums and integrity verification.
- What is the length of an MD5 hash? Always 32 hexadecimal characters (128 bits), regardless of input length.