flake8-json
JSON Formatting Reporter plugin for Flake8
Decision gist · record as of 2026-08-14
Yes, if you need JSON-formatted Flake8 output for automation or tooling integration. The plugin is stable, has no dependencies, and installs easily. The caveat: the project is seeking maintainers, so long-term support is uncertain; if you depend on active development or rapid bug fixes, verify the maintainer situation first.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low friction: pure Python wheel with no runtime dependencies.
- Last commit was recent (2026-07-13) and repo is active, though the project is explicitly seeking maintainers.
License · maintenance · safety
MIT (permissive) — MIT license is permissive and imposes no restrictions on use or distribution in proprietary or open-source projects.
last release 2024-04-20 (846 days) · last repo commit 2026-07-13 · 13 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 75,104 downloads/mo, #14,751 on PyPI
Alternatives
Verify before relying
pip install flake8-json
flake8 --format=json path/to/code.py
# or for pretty-printed output:
flake8 --format=json-pretty path/to/code.py- Whether CodeClimate format support (added in v20.12.0) is fully maintained or has known compatibility issues with current CodeClimate versions.
- Whether the project's active search for maintainers signals ongoing stability concerns or is routine maintenance rotation.
What it is and what it does
Flake8-JSON is a Flake8 plugin that converts linting output into machine-readable JSON format instead of the default text report. It offers three output modes: compact JSON, pretty-printed JSON, and CodeClimate-compatible format. The plugin has no runtime dependencies and integrates directly into Flake8's formatter system via command-line flags. It's useful when you need to parse linting results programmatically—for CI/CD pipelines, dashboards, or integration with other tools—rather than reading human-friendly text output.
The package is classified as production-stable and supports Python 3.6 and later. It has been maintained since 2017 and receives occasional updates. The repository is active but the maintainers are explicitly seeking additional contributors, which may indicate resource constraints rather than abandonment.
Use it for
- Parse Flake8 violations in CI/CD pipelines to fail builds or report metrics based on structured data.
- Feed linting results into dashboards or monitoring systems that consume JSON.
- Integrate Flake8 output with CodeClimate or similar code-quality platforms.
- Programmatically analyze and aggregate linting violations across multiple files or projects.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need JSON-formatted Flake8 output for automation or tooling integration.
The plugin is stable, has no dependencies, and installs easily. The caveat: the project is seeking maintainers, so long-term support is uncertain; if you depend on active development or rapid bug fixes, verify the maintainer situation first.
Install
flake8-json on PyPI
Before you install
Low friction: pure Python wheel with no runtime dependencies. Last commit was recent (2026-07-13) and repo is active, though the project is explicitly seeking maintainers.
License in practice
MIT license is permissive and imposes no restrictions on use or distribution in proprietary or open-source projects.
Quickstart
pip install flake8-json
flake8 --format=json path/to/code.py
# or for pretty-printed output:
flake8 --format=json-pretty path/to/code.pyVerify before relying
- Whether CodeClimate format support (added in v20.12.0) is fully maintained or has known compatibility issues with current CodeClimate versions.
- Whether the project's active search for maintainers signals ongoing stability concerns or is routine maintenance rotation.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.6 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 846 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 75,104 / month, #14,751 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/StableEnvironment :: ConsoleFramework :: Flake8Intended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: Implementation :: CPythonTopic :: Software Development :: Quality Assurance |
Evidence: flake8_json-24.4.0-py2.py3-none-any.whl
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See also flake8-gl-codeclimate · flake8-formatter-junit-xml · flake8 · python-json-logger · flake8-pyi · flake8-commas · flake8-print · flake8-deprecated · flake8-eradicate · flake8-junit-report