proselint
Python linter for English prose that flags usage problems drawn from well-known writers' style advice.
Run it on text or Markdown files to flag weak usage, with a pre-commit hook.
proselint is a command-line linter for English prose. It scans a file and reports passages that break usage advice drawn from writers and editors, much as a code linter flags bad code. It suits developers and writers who draft in plain text or Markdown.
What it is
You install it with pip (or apt, dnf or nix), run it on a file, and it lists the issues it finds. A pre-commit configuration is documented so drafts can be checked before they are committed.
Who it's for
It suits people who write in text files and want a free, offline style check. It does not rewrite sentences, check spelling in the way a full grammar tool does, or work in English-excluded languages.
Key features
Prose linter for English
Scans text for usage and style problems in the manner of a code linter.
Advice from writers
Checks are inspired by guidance from Garner, Wallace, Pinker, Twain and others.
pip and distro packages
Install with pip, or via dnf, apt or nix.
pre-commit hook
Add a documented repo entry to check drafts at commit time.
Offline command line
Runs locally with no account or API key.
BSD-3-Clause licence
Permissive licence for personal and commercial use.
Up and running in 3 steps
Our honest verdict
What's great
- One pip install and you can lint a file immediately.
- Works offline with no account.
- Permissive BSD-3-Clause licence.
- Fits Git-based writing workflows through the pre-commit hook.
Where it falls short
- English prose only.
- It flags problems but does not rewrite or fully correct grammar.
- Checks are opinionated, so some flags will not suit your style.
- It is a command-line tool with no graphical interface in the repo.
Pricing & license
proselint is free under the BSD-3-Clause licence. The README shows no paid plan, so the only cost is the Python environment you run it in.
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Alternatives
These reviewed AI tools do the same job instantly — from our scored directory.
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FAQ
Is proselint a grammar checker?
It is a prose linter focused on usage and style advice, so it complements rather than replaces a grammar and spelling checker.
Does it need an internet connection?
No. The README shows a local pip install and command-line use with no account or API key.
Can I use it in a Git workflow?
Yes. The README gives a pre-commit configuration that points at the repository.
