MD5 Hash Generator
Generate an MD5 checksum from any text or file — instantly, for free. Your data never leaves your browser. SHA-256 and SHA-512 are also computed simultaneously if you need a more secure hash.
HMAC mode
Generate keyed-hash message authentication codes
Drop a file here, or browse
Any file type, up to 2 GB. Never uploaded.
What is MD5?
MD5 (Message-Digest Algorithm 5) was designed by Ron Rivest in 1991 and produces a fixed-length 128-bit (32 hexadecimal character) hash from any input. For decades it was the standard for file integrity checksums — software download pages routinely listed an MD5 checksum to confirm a downloaded file was not corrupted or tampered with.
In 2004, researchers demonstrated practical collision attacks against MD5, meaning two different inputs could be crafted to produce the same hash. This makes MD5 unsuitable for digital signatures and security certificates. Most modern software now publishes SHA-256 checksums instead.
MD5 remains widely used for non-security checksums: database record IDs, cache keys, version fingerprints, and legacy systems that cannot be easily migrated. This generator lets you produce MD5 hashes from text or files without installing any software.
Common MD5 use cases
MD5 file checksum verification
Verify a downloaded file
Drop your downloaded file into the File tab to get its MD5 checksum. Compare it to the MD5 published by the software author using the Hash Comparison box on the homepage. A green check confirms the file is intact.
MD5 as a hash key
Generate cache keys
MD5's short 32-character output makes it efficient as a cache key or record ID. Many databases, CDNs, and caching layers use MD5 to deduplicate content by hashing the body.
MD5 for legacy systems
Legacy API compatibility
Some older APIs, CDN signed URLs, and payment gateways still require HMAC-MD5 signatures. Enable HMAC mode above and enter your secret key to generate an HMAC-MD5 without any command-line tools.
MD5 deduplication fingerprint
Content deduplication
MD5 produces a consistent fingerprint for identical files. Hashing files before storage lets you detect and remove duplicates — a common pattern in file storage systems and email deduplication pipelines.
MD5 frequently asked questions
What is an MD5 hash?
MD5 (Message Digest Algorithm 5) produces a 128-bit (32-character hexadecimal) hash of any input. It was widely used for file integrity verification and checksums. Today it is considered cryptographically broken — collisions can be engineered — but it remains useful for non-security purposes like verifying accidental file corruption.
Is MD5 safe to use?
MD5 is not safe for security-sensitive purposes such as password storage, digital signatures, or certificate fingerprints. Attackers can craft two different inputs with the same MD5 hash (a collision attack). For anything security-critical, use SHA-256 or SHA-512 instead. MD5 is still acceptable for non-security checksums (verifying a downloaded file was not corrupted during transfer).
How do I generate an MD5 hash online?
Paste your text into the input above — the MD5 hash appears instantly in the output panel. To hash a file, click the File tab and drop your file. The MD5 checksum is generated entirely in your browser; nothing is uploaded.
Can I generate MD5 from a file without uploading it?
Yes. The File tab reads your file using the browser's FileReader API and hashes it locally. Files up to 2 GB are supported. No data ever leaves your device.
What is the difference between MD5 and SHA-256?
MD5 produces a 32-character hex digest (128 bits); SHA-256 produces a 64-character hex digest (256 bits). SHA-256 is part of the SHA-2 family, is cryptographically secure, and is the modern standard for file checksums and digital signatures. MD5 should only be used when backward compatibility with legacy systems requires it.
How do I verify an MD5 checksum on Windows or macOS?
On macOS, run in Terminal: md5 /path/to/file. On Windows PowerShell: Get-FileHash C:\path\to\file -Algorithm MD5. Alternatively, drop the file into the File tab here and paste both the expected and computed MD5 values into the Hash Comparison box on the homepage for an instant match check.