Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes for any file. Drag and drop a file, and all four hashes are computed instantly in your browser. Copy any hash with one click, or paste a known hash to verify it matches. Uses the Web Crypto API for SHA hashes and SparkMD5 for MD5. All processing happens in your browser — your files never leave your device.
Drop any file here or click to upload
A file hash (or checksum) is a fixed-length string of characters computed from a file's contents using a cryptographic algorithm. It acts as a unique fingerprint for the file. Even a single byte change produces a completely different hash.
ConvertFree calculates four hash types simultaneously: MD5 (128-bit), SHA-1 (160-bit), SHA-256 (256-bit), and SHA-512 (512-bit). SHA-256 is the most commonly used for security verification.
Upload the file to calculate its hashes, then paste the known hash into the verification field. The tool will instantly tell you if it matches any of the four calculated hashes and which algorithm it corresponds to.
Yes. ConvertFree processes everything in your browser using the Web Crypto API for SHA hashes and SparkMD5 for MD5. Your files never leave your device and are never uploaded to any server.
MD5 produces a 128-bit hash and is fast but considered cryptographically weak. SHA-1 produces a 160-bit hash and is also deprecated for security use. SHA-256 produces a 256-bit hash and is currently the industry standard for security and integrity verification.
Since processing happens in your browser, limits depend on your device's memory. Files up to 100MB typically work fine. Larger files may take longer to hash but will still work on most modern devices.