Python UUID Utils

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Fast, drop-in replacement for Python's uuid module, powered by Rust.

Available UUID versions:

• uuid1 - Version 1 UUIDs using a timestamp and monotonic counter.
• uuid3 - Version 3 UUIDs based on the MD5 hash of some data.
• uuid4 - Version 4 UUIDs with random data.
• uuid5 - Version 5 UUIDs based on the SHA1 hash of some data.
• uuid6 - Version 6 UUIDs using a timestamp and monotonic counter.
• uuid7 - Version 7 UUIDs using a Unix timestamp ordered by time.
• uuid8 - Version 8 UUIDs using user-defined data.

Installation

Using pip:

pip install uuid-utils

or, using conda:

conda install -c conda-forge uuid-utils

Example

>>> import uuid_utils as uuid

>>> # make a random UUID
>>> uuid.uuid4()
UUID('ffe95fcc-b818-4aca-a350-e0a35b9de6ec')

>>> # make a random UUID using a Unix timestamp which is time-ordered.
>>> uuid.uuid7()
UUID('018afa4a-0d21-7e6c-b857-012bc678552b')

>>> # make a UUID using a SHA-1 hash of a namespace UUID and a name
>>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')

>>> # make a UUID using an MD5 hash of a namespace UUID and a name
>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')

Compatibility with Python UUID

Some frameworks (e.g. Django) require UUID instances from the standard-library uuid module, not a custom subclass. Use uuid_utils.compat for a drop-in replacement that returns stdlib uuid.UUID instances while still outperforming the standard library.

>>> import uuid_utils.compat as uuid

>>> uuid.uuid4()
UUID('ffe95fcc-b818-4aca-a350-e0a35b9de6ec')

Benchmarks

╭───────────────────────────────── benchdiff ──────────────────────────────────╮
│                                                                              │
│   Benchmark                    Min           Median          Max           × │
│  ─────────────────────────────────────────────────────────────────────────── │
│   uuid4()                                                                    │
│     stdlib_uuid4            1178.260ns     1189.167ns     1260.025ns    19.2 │
│     compat_uuid4            248.325ns      251.257ns      271.325ns     4.07 │
│     uuid_utils_uuid4         60.212ns       61.642ns       62.068ns     1.00 │
│   uuid7()                                                                    │
│     stdlib_uuid7            1327.365ns     1336.479ns     1615.529ns    15.7 │
│     compat_uuid7            277.427ns      279.572ns      286.819ns     3.30 │
│     uuid_utils_uuid7         83.582ns       84.654ns       93.588ns     1.00 │
│   UUID from hex                                                              │
│     stdlib_from_hex         443.457ns      463.514ns      472.753ns     5.47 │
│     uuid_utils_from_hex      84.256ns       84.639ns       85.301ns     1.00 │
│   UUID from bytes                                                            │
│     stdlib_from_bytes       398.878ns      400.830ns      403.030ns     3.80 │
│     uuid_utils_from_byt…    103.698ns      105.417ns      106.426ns     1.00 │
│                                                                              │
│ ──────────────────────────────────────────────────────────────────────────── │
│   Python      3.14.4                                                         │
│   Platform    macOS-26.3.1                                                   │
│   CPU         Apple M3 Pro                                                   │
│   Rounds      10 × 100,000 calls                                             │
│   Date        2026-05-13 21:24:22                                            │
╰──────────────────────────────────────────────────────────────────────────────╯

How to develop locally

make build
make test

Or:

maturin develop --release