Why?
Knip finds and fixes unused files, dependencies and exports. Use it for enhanced code and dependency management.
Read the full explanation: why should I use Knip?
Knip!
Declutter your JavaScript & TypeScript projects
How?
Deep analysis from fine-grained entry points based on the actual frameworks and tooling in (mono)repos for accurate and actionable results. Advanced features for maximum coverage:
- Custom module resolution
- Configuration file parsers
- Advanced shell script parser
- Built-in and custom compilers
- Auto-fix most issues
Enjoying Knip? Support it!
Battle-tested
Thousands of projects are already using Knip!
Plugins
Knip comes with over 90 plugins for tools and frameworks like Astro, Cypress, ESLint, Jest, GitHub Actions, Next.js, Nx, Remix, Storybook, Svelte, Vite, Vitest, Webpack and many many more.
Playground
Try Knip on the playground.
Troubleshooting
Need help? Start troubleshooting.
/'knɪp/
Knip means “(to) cut” and is pronounced with a hard “K” 🇳🇱
🧡 Projects using Knip
🧡 Introduction video
James Shopland has a great introduction and overview of Knip (thanks James!):
🧡 Sponsors
Eternal gratitude to the companies and people that are already supporting Knip:
Please see Sponsors for the full list. Consider supporting the project too!
🧡 Contributors
Special thanks to the wonderful people who have contributed to this project:
🧡 Articles
Most recent article first:
- Tom MacWright: Knip: good software for cleaning up TypeScript tech debt (2024-10-25)
- มาทำความสะอาด Project โค้ดของเราด้วย Knip กัน (2024-10-22/Thai)
- Anthony Pena: Knip: l’ultime outil pour faire le ménage dans vos projets! (2024-10-08/French)
- Taro: TypeScript/JavaScriptの不要なコードを削除するツール「Knip」の紹介 (2024-07-25/Japanese)
- Maddy Miller: Using Knip to find dead code in a high-traffic git repo (2023-09-17)
- Josh Goldberg: Speeding Up Centered Part 4: Unused Code Bloat (2023-08-21)
- Smashing Magazine: Knip: An Automated Tool For Finding Unused Files, Exports, And Dependencies (2023-08-14)
- Effective TypeScript: Recommendation Update: ✂️ Use knip to detect dead code and types (2023-07-29)
🧡 Testimonials
Gary Tyr@gary__tyr
Knip helped us delete ~300k lines of unused code at Vercel.
Gary Tyr@gary__tyr
Knip may be the greatest tool ever conceived.
https://www.npmjs.com/package/knip
Old Man Uzi@daviduzumeri.bsky.social
`knip` is the best code maintenance tool I've used in my 20 years of development, just an absolute work of art
Tom Hicks@Hicksyfern
knip is great.
A great example of stuff just working. It detects your environment so well and its defaults are almost too good because I didn’t realise it was doing everything automatically.
Tom Hicks@Hicksyfern
Then was like “this is how tooling should be, this has taken me an hour not a day and it’s faster and more accurate and more future proof”
Five stars ⭐️⭐️⭐️⭐️⭐️
Jökull Solberg@jokull
Crazy useful tool. Thought it would be a nightmare to setup in my Next.js+Workers repo but it has crazy good automatic detection for code dependencies. In short, Knip creates a graph of code use and highlights dead code for you to snip (knip).
Dominik 🔮@TkDodo
Lars is singlehandedly building the best tool to keep your code clean and your dependencies minimal. And he's so engaging and helpful. Can't imagine going back to not using knip 👏
Quinn Slack@sqs
warning: do not use a tool like https://knip.dev + code search to delete a ton of unused code. It works too well.
I just did this in https://github.com/sourcegraph/cody/pull/2705, and my boss said if I end the week with net negative lines of code committed, I'm in deep trouble.
Greg Bergé@gregberge_
Ran http://knip.dev in @argos_ci, and boom 💥! Dead code detected instantly. With a good config, it can run on CI to keep projects clean. Installing this tool should be a no-brainer, like Prettier or ESLint.
Kudos, @webprolific! 👏 
Cory House@housecor
Problem:
🚫 Your project has unused files.
🚫 It has unused npm dependencies.
🚫 It has unused TypeScript exports.
But you haven't noticed, because these things are hard to spot.
Solution: knip
I just used knip to find and resolve dozens of issues.
https://t.co/QmN3sNlmbm
Piotr Gacek 🐟@pkgacek
Knip helped me get rid of over 41k lines of code in legacy codebase 🥺🥺💕
Gajus@kuizinas
Big fans of Knip at @Contra. Such an extremely well developed and maintained project
Abhijeet Prasad@imabhiprasad
Just tried this on https://github.com/getsentry/sentry/ - got some super useful results! Nice work.
Fernando@fernandoeeu_dev
I've manage to delete 6k LOC in the last 30 minutes 🫣
Great job here @webprolific 👍🏽
Dominik 🔮@TkDodo
knip is an amazing tool. Shoutout to @webprolific for building it 🙌.
Not cleaning up correctly has a real maintenance cost. I've deleted lots of dead code - functions that were only used in tests and components that were only used in stories - all thanks to knip 🚀.
Michael Hoffmann@Mokkapps
🛠️ Knip
👉🏻 Knip finds unused files, dependencies and exports in your JavaScript and TypeScript projects.
👉🏻 Less code and dependencies lead to improved performance, less maintenance and easier refactorings.
https://github.com/webpro-nl/knip
Nicolas Carlo@nicoespeon
Knip is wonderful at finding out unused code/dependencies in a legacy JavaScript/TypeScript application
Recommend 💯
Here's how Josh used it to remove code bloat in Centered:
Smashing Magazine 🇺🇦 🏳️🌈@smashingmag
Unused files, exports, and dependencies often clutter projects, as it’s difficult knowing when one thing relies on another and scary to remove something you’re not sure is in use. 👀
↬ Meet Knip, which scours projects for these unused artifacts: https://www.smashingmagazine.com/2023/08/knip-automated-tool-find-unused-files-exports-dependencies/
Dan Vanderkam@danvdk
Recommendation update: use knip to find dead code, types and dependencies in your @typescript ✂️https://effectivetypescript.com/2023/07/29/knip/
Stefan Judis@stefanjudis
This is worth checking out on GitHub. 👍 https://github.com/webpro-nl/knip
Kailaash@BKailaash
Streamlining React projects with Knip:
Recently, I employed Knip for a project, and it worked wonders!
It efficiently resolved issues with removing
✅ Unused files,
✅ Unused npm dependencies,
✅ Unneeded TypeScript exports.
A real time-saver for maintaining a clean and efficient codebase. 🛠️ #ReactDevelopment
https://t.co/IbJH2fIzsE
Waldek Mastykarz@waldekm
Found a bunch of unused code, -dependencies, and unnecessary exports. Had just one false positive but overall pretty good. 10/10 would recommend.
If you’ve got a JavaScript package/project use Knip and remove unnecessary code. ✂️
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ISC License © 2024 Lars Kappert
