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Fabian Hiller

@fabianhiller.com

413 Following2.1k Followers

TypeScript expert w/ 400M+ monthly npm downloads. Creator of @valibot.dev & @formisch.dev, co-creator of https://standardschema.dev and prev engineer at https://usemotion.com

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@fabianhiller.comOct 8, 2026, 5:11 PM

Thank you! This means a lot to me and my team!

@evilmartians.comOct 8, 2026, 5:09 PMReposted by @fabianhiller.com

Valibot (@valibot.dev) is an OSS, type-safe schema library. Its maintainer, @fabianhiller.com, actively contributes to the TypeScript ecosystem and is on a mission to improve the web for everyone.

We support his vision, so we're donating to him as part of our open source donation program.

@fabianhiller.comOct 8, 2026, 5:09 PM

I applied via the official Codex for OSS form.

@fabianhiller.comOct 8, 2026, 5:09 PM

Thank you! 🙏

@fabianhiller.comSep 26, 2026, 10:43 PM

Thank you OpenAI for extending your support for Valibot and Formisch with 6 months of Codex

@fabianhiller.comSep 17, 2026, 9:20 PM

Thank you for 9,000 ⭐️ for Valibot on @github.com

@fabianhiller.comSep 14, 2026, 12:58 AM

v1.3 of Valibot's i18n package is now available with new translations for Kinyarwanda and Norwegian Nynorsk. We know support 34 languages. 🌐

@fabianhiller.comSep 12, 2026, 4:48 AM

The numbers of this benchmark are from the same product schema implemented with both libraries. Learn more here: schemabenchmarks.dev/download

@fabianhiller.comSep 12, 2026, 4:45 AM

Zod’s bundle size grows with each release. Valibot will always stay below 1 kB for simple schemas and below 2 kB for more complex ones.

@fabianhiller.comSep 11, 2026, 11:19 PM

Version 1.8 of Valibot's toJsonSchema package is now available. It comes with many fixes and improvements! 🧩

@fabianhiller.comSep 10, 2026, 6:48 PM

The Valibot v1.5 blog post is live: valibot.dev/blog/valibot...

@fabianhiller.comSep 10, 2026, 6:27 PM

Here is the benchmark we are referring to: schemabenchmarks.dev/initializati...

@fabianhiller.comSep 10, 2026, 6:26 PM

Valibot v1.5 is 20x faster at creating schemas. This makes it more than 70x faster than Zod for schema creation.

@fabianhiller.comSep 10, 2026, 4:20 AM

@valibot.dev v1.5 is now available, and a new release of our JSON Schema package will be coming soon. We will share more details about Valibot v1.5 in an upcoming blog post.

@fabianhiller.comSep 8, 2026, 1:11 AM

Formisch v1.1 is out. It ships with access to the internals and a smaller bug fix. Enjoy! 🎈 formisch.dev/react/guides...

@fabianhiller.comSep 8, 2026, 12:59 AM

Valibot's toJsonSchema package is used by Flue, AI SDK, @nuxt.com, @storybook.js.org and many many more.

@fabianhiller.comSep 8, 2026, 12:54 AM

Valibot's toJsonSchema package is about to pass 1M daily downloads on npm 🙏

@fabianhiller.comSep 7, 2026, 10:05 PM

New Valibot and Formisch minor releases will probably drop in the next 24 hours.

@fabianhiller.comSep 7, 2026, 5:53 PM

PR is up: github.com/open-circle/...

@santoshyadav.devSep 3, 2026, 12:27 PMReposted by @fabianhiller.com

🔴 LIVE today at 4 PM CET
Fabian Hiller @fabianhiller.com is joining us to talk about his open-source work — Valibot, Formisch, Standard Schema and the TypeScript ecosystem.See you there
www.youtube.com/live/2flAppg...

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