PostCSS is a tool to transform styles with JS plugins. By @sitnikcode and @evilmartians.
Joined November 2014
- Tweets 4,826
- Following 67
- Followers 9,168
- Likes 469
595 Photos and videos
PostCSS is one of the most popular front-end tools with 80M downloads/month.
Even if you don’t use it as a preprocessor, you still use it as a dependency in @Autoprefixer, @webpack or Create React App.
Now we are collecting funds to release PostCSS 8.0
opencollective.com/postcss/
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PostCSS retweeted
Introducing the CSS Property Type Validator Stylelint plugin. @schalkneethling released the first beta that validates @property registrations, custom property assignments, and var() usage in your linting workflow. #css #tools
schalkneethling.com/posts/in…
ALT “Introducing the CSS Property Type Validator Stylelint Plugin” title with author photo, @property --brand-color with syntax: color, but used as background-image: var(--brand-color) on .card.
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Celebrating my birthday today: 39.
If you’d like to support my work (npm supply chain attack research and trying to fix social media with Slow Reader), I’d be truly grateful for a GitHub Sponsors donation.
github.com/sponsors/ai/
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Oh wow, @amplify just sent me $50 through GitHub Sponsors. Huge thanks!
Now I can get that screwdriver for the house that’s been sitting on my wishlist.
github.com/sponsors/ai/
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Supply chain attacks can’t be solved with one silver bullet. They need a systemic approach.
For every dev layer (not just npm, but CI, Docker, and your editor) ask 4 questions:
1. How can we reduce dependencies?
2. Isolation
3. Update control
4. Review
Thread ↓
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May 13
Hey! I am open for contract or full-time work as a full-stack developer.
I've worked on industrial software, real estate tech, and a visual website builder. I specialize in design systems, a11y, and UX.
Previously maintained PostCSS, Rollup, and SVGO.
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Wow! Huge thanks to @elevenlabs for the $200/month sponsorship toward my work on open-source projects.
github.com/sponsors/ai/
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Big contributor to my open source projects (like PostCSS) is look for job. Don’t miss it.
Mar 24
Hey! Looking for a full-stack job. Global remote. Contract or full-time.
I build design tools and contribute to popular open-source projects.
My CV: trysound.io/hire-me
DM or email me at me@trysound.io
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CSSkit, a high-performance CSS toolchain written in Rust. Keith Cirkel’s project combines parsing, minification, linting, formatting, and LSP integration into one zero-config tool inspired by oxc. #css #tools
csskit.rs
ALT CSSkit logo surrounded by labels: Format, Lint, Transpile, Bundle, Minify, and Analyze.
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RT @evilmartians: PostCSS powers 0.5% of ALL web pages but only earned $300/month for 13 years. This story is not unique.
Your app likely…
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Tholmad is a unique writing system for the constructed language Vorgath.
The script is inspired by the seals of demons from the real medieval grimoire Ars Goetia (PostCSS version logos are based on these seals).
youtube.com/watch?v=JBt9TXVo…
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Feb 17
PostCSS creator, @sitnikcode, shares how to make your open source popular.
He also destroys the false idea that writing open source will make you famous, or that you should write open source to show your expertise. Plus, he explains how to avoid burnout when maintaining your products.
evilmartians.com/chronicles/…
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Jan 8
Calling all frontend engineers. It's your time to become a Martian!
We’re looking for a JS developer who respects CSS, UX, and design, and can work independently in a fully remote team.
This is a great opportunity to join the team behind OSS tools like @PostCSS, Nano Stores, and OKLCH. You’ll also help solve exciting problems for devtool startups like bolt.new, Teleport, and many more.
English fluency is required.
Sound like you? Apply here: evilmartians.com/careers/fro…
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26 Dec 2025
#5. @sitnikcode is the creator of @postcss, and he shared how others can also make popular open source tools.
Find the answers here: evilmartians.com/chronicles/…
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16 Dec 2025
Huge thanks to @nuqs47ng for his support of my open source on GitHub
github.com/sponsors/ai
We all need a little Christmas miracle during the holidays.
I'm signing the Open Source Pledge, it's time to give back to the maintainers of the projects nuqs depends on.
I just gave 2700€ ($3,212) to 18 maintainers & projects I use, love, and want to support.
Happy Thanksgiving! 💖
nuqs.dev/blog/open-source-pl…
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16 Dec 2025
Thank you for the recognition, @elevenlabs team, and congratulations to our @sitnikcode and @postcss!
15 Dec 2025
Today, we launch the ElevenLabs OSS Engineers Fund - a program that provides sustained support to the open-source projects that help power our work.
Over the next six months, we are contributing $22,000 to projects our engineers rely on.
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13 Nov 2025
Browserslist `>1% in my stats` query got support of Plausible data.
github.com/browserslist/brow…
We really think that it is important for our ecosystem to migrate from GA to many privacy-first analytics like @plausiblehq.
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28 Oct 2025
It’s great to see @sitnikcode here! @PostCSS gets about 2.5X downloads more than React (!) now. We all depend on Sitnik’s open software.
27 Oct 2025
▲ ~/𝚛𝚊𝚞𝚌𝚑𝚐/𝚘𝚜𝚜-𝚐𝚛𝚊𝚗𝚝𝚜/ 𝚕𝚜▐
I'm announcing 22 $1,000USD grants for foundational open source projects.
I selected a set of amazing contributors who are working on diverse problems in the JS/TS ecosystem.
Since I've mostly spent time on React (web) and Next, I've specifically chosen to support people working in other areas: Bun, Nitro, Vue, Nuxt, React Native, Vite…
… but also the foundations often overlooked, like the people quietly maintaining half the Node.js ecosystem, testing infrastructure, inheriting mature projects like Lodash, or contributing to TC39.
I plan to do more of these over time. There are a ton of people who deserve these and I haven't gotten around to yet, so expect more soon. I'm also always on the lookout for supporting the lesser-known up-and-comers, tips welcome 😁
Part of this is the financial contribution, but also very importantly: recognition. (PS: these are personal, not affiliated with Vercel, and fully unconditional)
rauchg-oss-grants.vercel.app
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28 Oct 2025
So good to see an Evil Martian on the list! Huge congrats to @sitnikcode 👏👏👏
27 Oct 2025
▲ ~/𝚛𝚊𝚞𝚌𝚑𝚐/𝚘𝚜𝚜-𝚐𝚛𝚊𝚗𝚝𝚜/ 𝚕𝚜▐
I'm announcing 22 $1,000USD grants for foundational open source projects.
I selected a set of amazing contributors who are working on diverse problems in the JS/TS ecosystem.
Since I've mostly spent time on React (web) and Next, I've specifically chosen to support people working in other areas: Bun, Nitro, Vue, Nuxt, React Native, Vite…
… but also the foundations often overlooked, like the people quietly maintaining half the Node.js ecosystem, testing infrastructure, inheriting mature projects like Lodash, or contributing to TC39.
I plan to do more of these over time. There are a ton of people who deserve these and I haven't gotten around to yet, so expect more soon. I'm also always on the lookout for supporting the lesser-known up-and-comers, tips welcome 😁
Part of this is the financial contribution, but also very importantly: recognition. (PS: these are personal, not affiliated with Vercel, and fully unconditional)
rauchg-oss-grants.vercel.app
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18 Oct 2025
By the way, 90% of the plugin was written with an LLM in @zeddotdev.
PostCSS plugins are good candidate for code generation: they’re small utility black boxes with a clear input/output and easy to test.
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18 Oct 2025
Made a new PostCSS plugin for generating more realistic smooth shadows like on smoothshadows.com
Now designers usually rely on generators, but the resulting code is often hard to maintain.
github.com/postcss/postcss-s…
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