Fast, drop-in replacement for Python's base64 module, powered by Rust.
Using pip:
$ pip install base64-utils>>> import base64_utils as base64
>>> encoded = base64.b64encode(b'data to be encoded')
>>> encoded
b'ZGF0YSB0byBiZSBlbmNvZGVk'
>>> data = base64.b64decode(encoded)
>>> data
b'data to be encoded'
╭──────────────────────────────────────── benchdiff ────────────────────────────────────────╮
│ │
│ Benchmark Min Median Max × │
│ ─────────────────────────────────────────────────────────────────────────────────────── │
│ b64encode (1 MB) │
│ stdlib_b64encode_1mb 625.286µs 633.988µs 644.107µs 6.414x │
│ base64_utils_b64encode_1mb 98.355µs 98.843µs 99.681µs 1.000x │
│ b64decode (1 MB) │
│ stdlib_b64decode_1mb 1118.293µs 1150.751µs 1544.677µs 5.627x │
│ base64_utils_b64decode_1mb 202.354µs 204.514µs 218.525µs 1.000x │
│ encodebytes (1 MB) │
│ stdlib_encodebytes_1mb 2089.592µs 2152.850µs 2325.929µs 11.616x │
│ base64_utils_encodebytes_1mb 184.732µs 185.340µs 191.616µs 1.000x │
│ decodebytes (1 MB) │
│ stdlib_decodebytes_1mb 1204.632µs 1220.026µs 1251.002µs 1.625x │
│ base64_utils_decodebytes_1mb 743.156µs 750.587µs 760.377µs 1.000x │
│ │
│ ───────────────────────────────────────────────────────────────────────────────────────── │
│ Python 3.14.2 │
│ Platform macOS-26.3.1 │
│ CPU Apple M3 Pro │
│ Rounds 10 × 1,000 calls │
│ Date 2026-05-09 12:46:18 │
╰───────────────────────────────────────────────────────────────────────────────────────────╯
$ make build
$ make test