python-rapidjson
Python wrapper around rapidjson
Decision gist · record as of 2026-08-14
Yes. python-rapidjson is actively maintained, has no known vulnerabilities, supports current Python versions (3.9–3.14), and offers genuine performance benefits over the standard library for JSON-heavy workloads. The MIT license is permissive. Medium install friction (compiled extension) is mitigated by pre-built wheels for most platforms. Install if you need faster JSON handling or JSONC support; skip if standard json performance is adequate.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Medium install friction due to compiled C++ extension requiring platform-specific wheels, but wheels are pre-built for Python 3.9–3.14 across macOS, Linux (including ARM and ppc64le), and Windows, reducing build complexity for most users.
License · maintenance · safety
MIT License (permissive) — MIT License permits unrestricted use, modification, and distribution in commercial and private projects with minimal obligations.
last release 2025-12-07 (250 days) · last repo commit 2026-08-09 · 533 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 4,949,031 downloads/mo, #2,191 on PyPI
Alternatives
Verify before relying
pip install python-rapidjson
import rapidjson
data = {'foo': 100, 'bar': 'baz'}
print(rapidjson.dumps(data))
print(rapidjson.loads('{"bar":"baz","foo":100}'))- Exact performance gains versus standard library json module and other third-party JSON libraries
- Whether JSON Schema validation supports all draft versions or specific subsets
- Memory overhead or constraints when processing very large JSON documents
What it is and what it does
python-rapidjson is a Python wrapper around RapidJSON, a C++ JSON parser and serialization library. It exposes fast JSON encoding and decoding for bytes, strings, and file-like objects, plus JSON Schema validation capabilities. The module is designed to be mostly compatible with Python's standard json module while prioritizing performance.
The package supports both functional and class-based APIs. It includes a Decoder class that can parse relaxed JSON syntax (JSONC with comments and trailing commas), and an Encoder class for customized serialization. It has no runtime dependencies and is actively maintained with wheels pre-built for multiple Python versions and architectures.
Use it for
- Replace json module in performance-critical applications that serialize/deserialize large JSON payloads frequently
- Parse JSON with comments (JSONC) or trailing commas in configuration files or development workflows
- Validate incoming JSON data against JSON Schema before processing in web services or APIs
- Stream large JSON documents to file-like objects with configurable chunk sizes
- Serialize Python objects to JSON in data pipelines where speed matters
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
python-rapidjson is actively maintained, has no known vulnerabilities, supports current Python versions (3.9–3.14), and offers genuine performance benefits over the standard library for JSON-heavy workloads. The MIT license is permissive. Medium install friction (compiled extension) is mitigated by pre-built wheels for most platforms. Install if you need faster JSON handling or JSONC support; skip if standard json performance is adequate.
Install
python-rapidjson on PyPI
Before you install
Medium install friction due to compiled C++ extension requiring platform-specific wheels, but wheels are pre-built for Python 3.9–3.14 across macOS, Linux (including ARM and ppc64le), and Windows, reducing build complexity for most users.
License in practice
MIT License permits unrestricted use, modification, and distribution in commercial and private projects with minimal obligations.
Quickstart
pip install python-rapidjson
import rapidjson
data = {'foo': 100, 'bar': 'baz'}
print(rapidjson.dumps(data))
print(rapidjson.loads('{"bar":"baz","foo":100}'))Verify before relying
- Exact performance gains versus standard library json module and other third-party JSON libraries
- Whether JSON Schema validation supports all draft versions or specific subsets
- Memory overhead or constraints when processing very large JSON documents
Package facts
| License | MIT License permissive |
| Python support | Supports the current Python release >=3.6 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 250 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 4,949,031 / month, #2,191 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersProgramming Language :: C++Programming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: 3.9 |
Evidence: python_rapidjson-1.23-cp310-cp310-macosx_10_9_x86_64.whl; python_rapidjson-1.23-cp310-cp310-macosx_11_0_arm64.whl; python_rapidjson-1.23-cp310-cp310-manylinux_2_24_aarch64.manylinux_2_28_aarch64.whl; python_rapidjson-1.23-cp310-cp310-manylinux_2_24_ppc64le.manylinux_2_28_ppc64le.whl; python_rapidjson-1.23-cp310-cp310-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl; python_rapidjson-1.23-cp310-cp310-musllinux_1_2_aarch64.whl; python_rapidjson-1.23-cp310-cp310-musllinux_1_2_ppc64le.whl; python_rapidjson-1.23-cp310-cp310-musllinux_1_2_x86_64.whl; python_rapidjson-1.23-cp310-cp310-win32.whl; python_rapidjson-1.23-cp310-cp310-win_amd64.whl; python_rapidjson-1.23-cp311-cp311-macosx_10_9_x86_64.whl; python_rapidjson-1.23-cp311-cp311-macosx_11_0_arm64.whl; python_rapidjson-1.23-cp311-cp311-manylinux_2_24_aarch64.manylinux_2_28_aarch64.whl; python_rapidjson-1.23-cp311-cp311-manylinux_2_24_ppc64le.manylinux_2_28_ppc64le.whl; python_rapidjson-1.23-cp311-cp311-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl; python_rapidjson-1.23-cp311-cp311-musllinux_1_2_aarch64.whl; python_rapidjson-1.23-cp311-cp311-musllinux_1_2_ppc64le.whl; python_rapidjson-1.23-cp311-cp311-musllinux_1_2_x86_64.whl; python_rapidjson-1.23-cp311-cp311-win32.whl; python_rapidjson-1.23-cp311-cp311-win_amd64.whl
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See also ujson · pysimdjson · simplejson · json-with-comments · json5kit · rapidyaml · dirtyjson · jsoncomment · http-sf · ijson