can-ada
Ada is a fast spec-compliant url parser
Decision gist · record as of 2026-08-14
Yes, if you need WHATWG-compliant URL parsing or are performance-sensitive on URL operations. The MIT license, lack of runtime dependencies, and active maintenance make it low-risk. Install only if standard urllib.parse behavior is insufficient or speed is critical; otherwise urllib is built-in and adequate.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- C++17 compiler required if a precompiled wheel is unavailable for your platform; requires Python 3.9 or later
- Medium install friction due to C++17 compilation requirement when wheels are unavailable, though binary wheels cover most common platforms.
- The package is actively maintained with recent releases and no known vulnerabilities.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.
last release 2026-01-28 (198 days) · last repo commit 2026-01-28 · 142 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 132,425 downloads/mo, #11,553 on PyPI
Alternatives
Verify before relying
pip install can_ada
from can_ada import parse, URLSearchParams
url = parse("https://example.com/path?q=test")
print(url.hostname) # example.com
print(url.pathname) # /path
params = URLSearchParams("q=test&page=1")
params.append("page", "2")
print(params.get_all("page")) # [1, 2]- Whether the ~4x performance improvement over urllib holds across different URL patterns and workloads beyond the benchmark shown
- Compatibility with edge cases in URL parsing beyond the WHATWG spec examples provided
What it is and what it does
can_ada is a Python binding to Ada, a WHATWG-compliant URL parser written in C++. It parses URLs and query strings according to the official web standard, which differs from Python's urllib.parse in handling internationalized domain names, path normalization, and other edge cases. The package provides a parse() function that returns a URL object with properties like hostname, pathname, protocol, and search, plus a URLSearchParams class for manipulating query parameters. It has no runtime dependencies and is distributed as precompiled wheels for most platforms.
The main value proposition is speed—the documentation shows it performs roughly 4x faster than urllib.parse on typical workloads—combined with standards compliance. It's useful when you need correct URL parsing according to web specifications rather than Python's historical behavior, or when URL parsing is a performance bottleneck. Installation requires a C++17 compiler if a wheel is not available for your platform.
Use it for
- Parsing and normalizing URLs in web scrapers or HTTP clients where WHATWG compliance matters
- Building URL manipulation tools that need to correctly handle internationalized domain names and path normalization
- High-throughput URL processing where the 4x performance gain over urllib justifies the dependency
- Handling query parameters with the URLSearchParams API when multiple values per key are needed
- Migrating from Node.js or browser-based URL parsing to Python while maintaining identical behavior
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need WHATWG-compliant URL parsing or are performance-sensitive on URL operations.
The MIT license, lack of runtime dependencies, and active maintenance make it low-risk. Install only if standard urllib.parse behavior is insufficient or speed is critical; otherwise urllib is built-in and adequate.
Install
can-ada on PyPI
Before you install
Medium install friction due to C++17 compilation requirement when wheels are unavailable, though binary wheels cover most common platforms. The package is actively maintained with recent releases and no known vulnerabilities.
C++17 compiler required if a precompiled wheel is unavailable for your platform; requires Python 3.9 or later
License in practice
MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.
Quickstart
pip install can_ada
from can_ada import parse, URLSearchParams
url = parse("https://example.com/path?q=test")
print(url.hostname) # example.com
print(url.pathname) # /path
params = URLSearchParams("q=test&page=1")
params.append("page", "2")
print(params.get_all("page")) # [1, 2]Verify before relying
- Whether the ~4x performance improvement over urllib holds across different URL patterns and workloads beyond the benchmark shown
- Compatibility with edge cases in URL parsing beyond the WHATWG spec examples provided
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Aging 198 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 132,425 / month, #11,553 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: can_ada-3.0.0-cp310-cp310-macosx_10_15_universal2.whl; can_ada-3.0.0-cp310-cp310-macosx_10_15_x86_64.whl; can_ada-3.0.0-cp310-cp310-macosx_11_0_arm64.whl; can_ada-3.0.0-cp310-cp310-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl; can_ada-3.0.0-cp310-cp310-manylinux_2_26_ppc64le.manylinux_2_28_ppc64le.whl; can_ada-3.0.0-cp310-cp310-manylinux_2_26_s390x.manylinux_2_28_s390x.whl; can_ada-3.0.0-cp310-cp310-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl; can_ada-3.0.0-cp310-cp310-musllinux_1_2_aarch64.whl; can_ada-3.0.0-cp310-cp310-musllinux_1_2_ppc64le.whl; can_ada-3.0.0-cp310-cp310-musllinux_1_2_s390x.whl; can_ada-3.0.0-cp310-cp310-musllinux_1_2_x86_64.whl; can_ada-3.0.0-cp310-cp310-win32.whl; can_ada-3.0.0-cp310-cp310-win_amd64.whl; can_ada-3.0.0-cp311-cp311-macosx_10_15_universal2.whl; can_ada-3.0.0-cp311-cp311-macosx_10_15_x86_64.whl; can_ada-3.0.0-cp311-cp311-macosx_11_0_arm64.whl; can_ada-3.0.0-cp311-cp311-manylinux_2_26_aarch64.manylinux_2_28_aarch64.whl; can_ada-3.0.0-cp311-cp311-manylinux_2_26_ppc64le.manylinux_2_28_ppc64le.whl; can_ada-3.0.0-cp311-cp311-manylinux_2_26_s390x.manylinux_2_28_s390x.whl; can_ada-3.0.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
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