Calculate the MD5 hash of text or files with uppercase/lowercase toggle
Enter text or select a file to calculate the MD5 hash.
MD5 is widely used to verify that a downloaded file has not been corrupted during transfer. Compare the published MD5 hash against the hash of your downloaded file.
MD5 is cryptographically broken and must not be used for passwords, digital signatures, or any security-sensitive purpose. Use SHA-256 or bcrypt instead.
Many older protocols and databases use MD5 for non-security checksums. This tool lets you quickly reproduce or verify those hashes without needing a terminal.
MD5 (Message-Digest Algorithm 5) produces a 128-bit (16-byte) hash value, typically represented as a 32-character hexadecimal string. It was designed by Ronald Rivest in 1991.
MD5 collision attacks have been demonstrated in practice — two different inputs can produce the same hash. This makes MD5 unsuitable for cryptographic use, though it remains useful for fast non-security checksums.
For large files this tool reads data in 2 MB chunks using incremental hashing (SparkMD5). This keeps the browser responsive and avoids out-of-memory errors for gigabyte-sized files.
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