Generates hashes from file upload, text or URL using various algorithms.
This online tool generates hashes using various algorithms (MD5, MD5-24, SHA1, CRC32 and more) for either uploaded files or directly entered data.
Hashing is a process of generating a string (or number) with limited width from a data stream of arbitrary length. Produced hash identifies that particular data stream while not exceeding a certain length.
Of course, one hash matches many possible streams because it has limited width; however, good hash functions make it impossible to guess which data will have the same hash. Hashes can be reversible and irreversible; all hashes handled by this tool are irreversible meaning that you can't rebuild the original data stream given a hash string.
Reference pages on popular hashing algorithms:
- MD5 (Message Digest 5) – very popular algorithm well-known for its entropy quality. Hash takes 16 bytes (128 bits) but is often converted to 32-character long string (simply a hexadecimal representation of raw hash) containing Latin characters (case-insensitive) and digits.
- Short MD5 (sometimes MD5-24) – a case-sensitive version of MD5 hash function using extended alphabet (41 symbols). While still URL-safe it takes up to 24 characters instead of 32. PHP implementation are freely available here.
- SHA1 (Secure Hash Algorithm 1) – a 40-character long string which strength can be compared to that of MD5.
- CRC32 (Cyclic redundancy check) – basic, quick, widely used method of calculating checksums of data. The hash takes exactly 4 bytes (32 bits).
- Adler32 (Mark Adler's algorithm) – very similar to CRC32 but a bit faster and less reliable. Also takes up exactly 4 bytes (32 bits). Is a part of the very well-known ZLib compression library.
Less known hash functions that this tool uses:
- HAVAL – produces hashes of different lengths (128, 160, 192, 224 and 256-bit hashes) and number of rounds (3, 4 or 5). Numbers in its name read as: HAVAL <bits>,<rounds>.
- Tiger – a hash initially designed for 64-bit platforms; used in DirectConnect (DC++) applications. Standard hash width is 192 bits.
- RIPEMD – cryptographic hash function designed in an open academic community. Standard hash width is 160 bits. Similar in performance to SHA-1.