Fabian Hiller
@fabianhiller.com
Creator of @valibot.dev, creator of Formisch, co-creator of https://standardschema.dev and engineer at https://usemotion.com
Pinned
Excited to announce Standard JSON Schema! 🔥
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
Big milestone: @formisch.dev crossed 500 GitHub stars! ⭐
Formisch is a schema-based form library offering native performance, a tiny bundle size and full type safety. 🧱
Huge thanks to the community! Try Formisch today with React, Solid, Svelte, Qwik, Preact or Vue.
Formisch is a schema-based form library offering native performance, a tiny bundle size and full type safety. 🧱
Huge thanks to the community! Try Formisch today with React, Solid, Svelte, Qwik, Preact or Vue.
December 17, 2025 at 12:43 PM
Big milestone: @formisch.dev crossed 500 GitHub stars! ⭐
Formisch is a schema-based form library offering native performance, a tiny bundle size and full type safety. 🧱
Huge thanks to the community! Try Formisch today with React, Solid, Svelte, Qwik, Preact or Vue.
Formisch is a schema-based form library offering native performance, a tiny bundle size and full type safety. 🧱
Huge thanks to the community! Try Formisch today with React, Solid, Svelte, Qwik, Preact or Vue.
Excited to announce Standard JSON Schema! 🔥
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
December 16, 2025 at 7:47 PM
Excited to announce Standard JSON Schema! 🔥
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
We launched Standard Schema ~1 year ago, and it's been a massive success—adopted across the ecosystem with libraries like @zod.dev, @valibot.dev, and @arktype.io leading the way.
Standard JSON Schema is out 🔥
For @valibot.dev v1.3, I will look into implementing the spec into the core package via a side-effect import. The goal is to improve the DX while maintaining Valibot’s small, tree-shakable bundle size. 🧩
For @valibot.dev v1.3, I will look into implementing the spec into the core package via a side-effect import. The goal is to improve the DX while maintaining Valibot’s small, tree-shakable bundle size. 🧩
Introducing ✨ Standard JSON Schema ✨
It's a sister spec to Standard Schema that provides a common interface for any entity that can be converted to JSON Schema
It's a sister spec to Standard Schema that provides a common interface for any entity that can be converted to JSON Schema
December 16, 2025 at 10:04 AM
Standard JSON Schema is out 🔥
For @valibot.dev v1.3, I will look into implementing the spec into the core package via a side-effect import. The goal is to improve the DX while maintaining Valibot’s small, tree-shakable bundle size. 🧩
For @valibot.dev v1.3, I will look into implementing the spec into the core package via a side-effect import. The goal is to improve the DX while maintaining Valibot’s small, tree-shakable bundle size. 🧩
The React docs for Formisch are up: formisch.dev/react/guides...
December 8, 2025 at 1:14 PM
The React docs for Formisch are up: formisch.dev/react/guides...
Formisch is blowing up! 🤯 Thank you all for the overwhelming love and support.
We’re quietly chasing 1,000 stars before the year ends. If you haven’t starred yet, now’s the perfect time! 😇
github.com/open-circle/...
We’re quietly chasing 1,000 stars before the year ends. If you haven’t starred yet, now’s the perfect time! 😇
github.com/open-circle/...
December 6, 2025 at 9:11 PM
Formisch is blowing up! 🤯 Thank you all for the overwhelming love and support.
We’re quietly chasing 1,000 stars before the year ends. If you haven’t starred yet, now’s the perfect time! 😇
github.com/open-circle/...
We’re quietly chasing 1,000 stars before the year ends. If you haven’t starred yet, now’s the perfect time! 😇
github.com/open-circle/...
@formisch.dev hit 6,000 docs views in 30 days 😭
Thank you for turning my weekend project into something much bigger! 🙏
What have you built with Formisch so far? What framework are you using? 👀
Thank you for turning my weekend project into something much bigger! 🙏
What have you built with Formisch so far? What framework are you using? 👀
December 6, 2025 at 1:04 AM
@formisch.dev hit 6,000 docs views in 30 days 😭
Thank you for turning my weekend project into something much bigger! 🙏
What have you built with Formisch so far? What framework are you using? 👀
Thank you for turning my weekend project into something much bigger! 🙏
What have you built with Formisch so far? What framework are you using? 👀
This is the entire login form. Seriously.
✅ Just give us your schema
✅ No custom type definitions are needed
✅ No generics → types are inferred
That’s it. Clean, tiny, stupidly type-safe.
✅ Just give us your schema
✅ No custom type definitions are needed
✅ No generics → types are inferred
That’s it. Clean, tiny, stupidly type-safe.
December 5, 2025 at 3:27 PM
This is the entire login form. Seriously.
✅ Just give us your schema
✅ No custom type definitions are needed
✅ No generics → types are inferred
That’s it. Clean, tiny, stupidly type-safe.
✅ Just give us your schema
✅ No custom type definitions are needed
✅ No generics → types are inferred
That’s it. Clean, tiny, stupidly type-safe.
React folks, quiet launch alert 🚀
I just shipped Formisch for React — the form library I originally built for @solidjs.com that people kept begging me to port.
I just shipped Formisch for React — the form library I originally built for @solidjs.com that people kept begging me to port.
December 4, 2025 at 4:57 PM
React folks, quiet launch alert 🚀
I just shipped Formisch for React — the form library I originally built for @solidjs.com that people kept begging me to port.
I just shipped Formisch for React — the form library I originally built for @solidjs.com that people kept begging me to port.
The first @formisch.dev for @react.dev tests were successful. A first version could be available by next week. 🧩
Formisch: The modular and type-safe form library for any framework
Formisch is a schema-based, headless form library for JS frameworks. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design.
formisch.dev
December 3, 2025 at 4:53 PM
The first @formisch.dev for @react.dev tests were successful. A first version could be available by next week. 🧩
The `toJsonSchema` function of Valibot was updated: github.com/open-circle/...
Release v1.4.0 (to-json-schema) · open-circle/valibot
Many thanks to @stefanprobst, @sruenwg and @cruzdanilo for contributing to this release.
Add support for examples action
Add support for integer when used with minValue and maxValue actions (pull ...
github.com
December 3, 2025 at 5:00 AM
The `toJsonSchema` function of Valibot was updated: github.com/open-circle/...
🚨 Security Alert: Valibot v1.2 is out! We've fixed a critical ReDoS vulnerability in the `emoji()` action's regex that could lead to excessive CPU usage on malicious inputs.
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
November 25, 2025 at 8:36 PM
🚨 Security Alert: Valibot v1.2 is out! We've fixed a critical ReDoS vulnerability in the `emoji()` action's regex that could lead to excessive CPU usage on malicious inputs.
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
@valibot.dev v1.2 adds a handy new feature: `examples([…])`
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
November 25, 2025 at 4:22 PM
@valibot.dev v1.2 adds a handy new feature: `examples([…])`
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
@valibot.dev v1.2 is out! This version adds powerful transformation actions for type coercion, new metadata features to improve AI tool integration, and ISBN validation for library management systems. valibot.dev/blog/valibot...
November 25, 2025 at 2:29 PM
@valibot.dev v1.2 is out! This version adds powerful transformation actions for type coercion, new metadata features to improve AI tool integration, and ISBN validation for library management systems. valibot.dev/blog/valibot...
Reposted by Fabian Hiller
Thank you @fabianhiller.com for sponsoring me on @github.com !! You can join them at my sponsors profile: github.com/sponsors/ysk...
November 25, 2025 at 1:05 PM
Thank you @fabianhiller.com for sponsoring me on @github.com !! You can join them at my sponsors profile: github.com/sponsors/ysk...
@valibot.dev v1.2 drops in a few days! 🔥
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
November 23, 2025 at 2:38 AM
@valibot.dev v1.2 drops in a few days! 🔥
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
Thank you to everyone who tried out @formisch.dev this week! It's great to see more downloads and activity on GitHub! If you're new to the project, you can find out more in our docs: formisch.dev
Formisch: The modular and type-safe form library for any framework
Formisch is a schema-based, headless form library for JS frameworks. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design.
formisch.dev
November 22, 2025 at 8:01 PM
Thank you to everyone who tried out @formisch.dev this week! It's great to see more downloads and activity on GitHub! If you're new to the project, you can find out more in our docs: formisch.dev
Which of you are already using @zod.dev, @valibot.dev, @arktype.io or any other libraries that are compatible with standardschema.dev with @vitest.dev? What is your feedback?
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
November 22, 2025 at 7:53 PM
Which of you are already using @zod.dev, @valibot.dev, @arktype.io or any other libraries that are compatible with standardschema.dev with @vitest.dev? What is your feedback?
Reposted by Fabian Hiller
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
November 19, 2025 at 3:40 PM
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
v-model + type-safe nested paths + zero boilerplate = Formisch for @vuejs.org
Headless. Schema-driven. Actually nice to use.
Real example ↓
Headless. Schema-driven. Actually nice to use.
Real example ↓
November 21, 2025 at 3:33 PM
v-model + type-safe nested paths + zero boilerplate = Formisch for @vuejs.org
Headless. Schema-driven. Actually nice to use.
Real example ↓
Headless. Schema-driven. Actually nice to use.
Real example ↓
From 0 to 59,721,923 monthly downloads in 11 months.
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
November 20, 2025 at 3:50 PM
From 0 to 59,721,923 monthly downloads in 11 months.
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
Excited about @formisch.dev + @valibot.dev? 🧩 This schema-first duo makes building robust forms a breeze! Define your form with Valibot—get auto-inferred TS types, seamless validation with custom errors. Works out of the box with @solidjs.com, @vuejs.org, @svelte.dev, @preactjs.com and @qwik.dev.
November 20, 2025 at 3:34 PM
Excited about @formisch.dev + @valibot.dev? 🧩 This schema-first duo makes building robust forms a breeze! Define your form with Valibot—get auto-inferred TS types, seamless validation with custom errors. Works out of the box with @solidjs.com, @vuejs.org, @svelte.dev, @preactjs.com and @qwik.dev.
Just a quick note in advance: I moved @valibot.dev and @formisch.dev to a new GitHub organization called @opencircle.dev. I also renamed our Discord channel. I plan to share more information about Open Circle over the next few weeks. 🧩
November 20, 2025 at 3:42 AM
Just a quick note in advance: I moved @valibot.dev and @formisch.dev to a new GitHub organization called @opencircle.dev. I also renamed our Discord channel. I plan to share more information about Open Circle over the next few weeks. 🧩
Formisch is the form library your framework has been begging for. The docs are so good you’ll actually read them: formisch.dev
November 19, 2025 at 3:43 PM
Formisch is the form library your framework has been begging for. The docs are so good you’ll actually read them: formisch.dev
November 14, 2025 at 2:54 PM
Thrilled to welcome LambdaTest as a new partner of Valibot! LambdaTest is a cloud-based testing platform that supports cross-browser testing on 3000+ browsers and real devices, with AI-powered features for test orchestration. Thank you for supporting our open source work!
November 13, 2025 at 3:05 PM
Thrilled to welcome LambdaTest as a new partner of Valibot! LambdaTest is a cloud-based testing platform that supports cross-browser testing on 3000+ browsers and real devices, with AI-powered features for test orchestration. Thank you for supporting our open source work!