The b3sum Rust crate, which provides a command line interface. It uses multithreading by default, making it an order of magnitude faster than e.g. sha256sum on typical desktop hardware.
This is free and open source software.
BLAKE3 is a cryptographic hash function that is:
- Much faster than MD5, SHA-1, SHA-2, SHA-3, and BLAKE2.
- Secure, unlike MD5 and SHA-1. And secure against length extension, unlike SHA-2.
- Highly parallelizable across any number of threads and SIMD lanes, because it’s a Merkle tree on the inside.
- Capable of verified streaming and incremental updates, again because it’s a Merkle tree.
- A PRF, MAC, KDF, and XOF, as well as a regular hash.
- One algorithm with no variants, which is fast on x86-64 and also on smaller architectures.
Website: github.com/BLAKE3-team/BLAKE3
Support:
Developer: Jack O’Connor
License: CC0-1.0 OR Apache-2.0 OR Apache-2.0 WITH LLVM-exception

b3sum is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| CLI Data Hashing Tools | |
|---|---|
| xxHash | Non-cryptographic hash algorithm |
| b3sum | Implementation of the BLAKE3 hash function |
| RHash | Calculate and verify magnet links and various message digests |
| md5sum | Compute and check MD5 message digest; part of GNU Coreutils |
| cfv | Test and create checksum files |
| Jacksum | Work with checksums, CRCs, and message digests |
| md5 | Generate / check MD5 message digest |
| digup | Update md5sum or shasum digest files |
| cksum | Compute and verify file checksums |
| Hashrat | Hash-generation utility |
| Directory Checksum | Recursively calculate checksums for directory contents |
| paq | Fast BLAKE3 hashing tool for files and directories |
| ddgst | Hashing and checksum utility |
| QCalcFileHash | Hash calculator |
| hashdir | Checksum directories and files |
| Hash Calculator | Calculates around 50 cryptographic hashes of strings and files |
| dano | Hashdeep/md5tree for media files |
| sha3sum | Keccak, SHA-3, SHAKE, and RawSHAKE checksum utilities |
| luha | Simple file checksum tool |
| filepack | File hashing and verification |
| bitrat | Fast file checksum tool supporting multiple hash algorithms |
| b2sum | Calculate BLAKE2 checksums |
| Additional tools: | |
| hashit | Generate file hashes quickly |
| hashdeep | Generate and verify file hashes |
| cksfv | Create and check sfv listings using CRC32 checksums |
| cksfv.rs | Reimplements the classic cksfv tool |
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