Fabian Hiller
@fabianhiller.com
Creator of @valibot.dev, creator of Formisch, co-creator of https://standardschema.dev and engineer at https://usemotion.com
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!
Struggling with unknown data in TypeScript? @valibot.dev parses it effortlessly: validate & transform via pipes, grab detailed issues with safeParse (no throws!), and optimize perf with the abortEarly config.
October 15, 2025 at 2:43 PM
Struggling with unknown data in TypeScript? @valibot.dev parses it effortlessly: validate & transform via pipes, grab detailed issues with safeParse (no throws!), and optimize perf with the abortEarly config.
@valibot.dev infers TS types + issues from your schemas! 🔥
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
October 14, 2025 at 3:03 PM
@valibot.dev infers TS types + issues from your schemas! 🔥
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
The docs for Formisch will probably be available in the next few days 🧱
October 13, 2025 at 12:40 AM
The docs for Formisch will probably be available in the next few days 🧱
What do you think about the new logo I designed for Formisch? 🧱
October 5, 2025 at 3:56 PM
What do you think about the new logo I designed for Formisch? 🧱
Thank you for your 8,000 stars on @github.com for @valibot.dev!
October 1, 2025 at 1:51 PM
Thank you for your 8,000 stars on @github.com for @valibot.dev!
I guess I shipped on September 18th 🛳️
September 21, 2025 at 1:05 AM
I guess I shipped on September 18th 🛳️
What are "pipelines" in @valibot.dev?
ℹ️ A pipeline is a left-to-right chain of schemas and actions
ℹ️ Each step gets the previous step’s output and can validate and transform
ℹ️ The final schema’s output type is the last step’s output type
ℹ️ A pipeline is a left-to-right chain of schemas and actions
ℹ️ Each step gets the previous step’s output and can validate and transform
ℹ️ The final schema’s output type is the last step’s output type
September 18, 2025 at 2:36 PM
What are "pipelines" in @valibot.dev?
ℹ️ A pipeline is a left-to-right chain of schemas and actions
ℹ️ Each step gets the previous step’s output and can validate and transform
ℹ️ The final schema’s output type is the last step’s output type
ℹ️ A pipeline is a left-to-right chain of schemas and actions
ℹ️ Each step gets the previous step’s output and can validate and transform
ℹ️ The final schema’s output type is the last step’s output type
Thank you for 2,003,706 downloads in the last 7 days 🙏
September 17, 2025 at 3:06 PM
Thank you for 2,003,706 downloads in the last 7 days 🙏
Great article by @cheddybop.bsky.social about front-end frameworks and innovation in this field. Give it a read! www.lorenstew.art/blog/react-w...
September 16, 2025 at 10:00 PM
Great article by @cheddybop.bsky.social about front-end frameworks and innovation in this field. Give it a read! www.lorenstew.art/blog/react-w...
Who wants to become the 300th star? ⭐️ github.com/fabian-hille...
September 16, 2025 at 8:38 PM
Who wants to become the 300th star? ⭐️ github.com/fabian-hille...
I am excited to announce Formisch for @svelte.dev! @sveltesociety.dev, you have a new form library! ⚡️
Formisch is a schema-based, headless form library. 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 is a schema-based, headless form library. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design. 🪄
September 15, 2025 at 8:07 PM
I am excited to announce Formisch for @svelte.dev! @sveltesociety.dev, you have a new form library! ⚡️
Formisch is a schema-based, headless form library. 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 is a schema-based, headless form library. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design. 🪄
@valibot.dev's mental modal is great because it consists of only 3 major building blocks…
✅ Methods help you modify or use a schema
✅ Schemas validate a specific data type
✅ Actions validate or transform a known data type
✅ Methods help you modify or use a schema
✅ Schemas validate a specific data type
✅ Actions validate or transform a known data type
September 11, 2025 at 2:10 PM
@valibot.dev's mental modal is great because it consists of only 3 major building blocks…
✅ Methods help you modify or use a schema
✅ Schemas validate a specific data type
✅ Actions validate or transform a known data type
✅ Methods help you modify or use a schema
✅ Schemas validate a specific data type
✅ Actions validate or transform a known data type
I am excited to share that Motion has raised $60M at a valuation of $550M to build an agentic work suite for businesses. Currently, I am responsible for developing AI Sheets, which enable you to run AI agents in bulk to automatically enrich and process data at scale. ⚡️
September 8, 2025 at 5:51 PM
I am excited to share that Motion has raised $60M at a valuation of $550M to build an agentic work suite for businesses. Currently, I am responsible for developing AI Sheets, which enable you to run AI agents in bulk to automatically enrich and process data at scale. ⚡️
Many thanks to @paolo.ricciuti.me for improving the official Zod-to-Valibot codemod. The codemod can now convert transformations and refinements. Check it out on our website: valibot.dev/guides/migra...
September 6, 2025 at 5:45 PM
Many thanks to @paolo.ricciuti.me for improving the official Zod-to-Valibot codemod. The codemod can now convert transformations and refinements. Check it out on our website: valibot.dev/guides/migra...
For comparison: I think this is what a similar schema would look like in Zod Mini. It doesn't seem to support adding metadata, so I couldn't add the description.
September 5, 2025 at 2:33 PM
For comparison: I think this is what a similar schema would look like in Zod Mini. It doesn't seem to support adding metadata, so I couldn't add the description.
@valibot.dev's pipelines are powerful because…
✅ they offer a clean API with a simple mental-model
✅ they support validation, transformation and adding metadata
✅ they are lightweight and fully typesafe
✅ they offer a clean API with a simple mental-model
✅ they support validation, transformation and adding metadata
✅ they are lightweight and fully typesafe
September 5, 2025 at 2:51 AM
@valibot.dev's pipelines are powerful because…
✅ they offer a clean API with a simple mental-model
✅ they support validation, transformation and adding metadata
✅ they are lightweight and fully typesafe
✅ they offer a clean API with a simple mental-model
✅ they support validation, transformation and adding metadata
✅ they are lightweight and fully typesafe
Switching from @valibot.dev to @zod.dev increases the bundle size by 18x, or by 4x if you choose Zod Mini.
September 4, 2025 at 1:51 PM
Switching from @valibot.dev to @zod.dev increases the bundle size by 18x, or by 4x if you choose Zod Mini.
@valibot.dev source code and API is...
✅optimized for bundle size and compression
✅every additional schema only adds a few extra bytes
✅designed for tree-shaking to eliminate unused code
✅optimized for bundle size and compression
✅every additional schema only adds a few extra bytes
✅designed for tree-shaking to eliminate unused code
September 4, 2025 at 1:30 PM
@valibot.dev source code and API is...
✅optimized for bundle size and compression
✅every additional schema only adds a few extra bytes
✅designed for tree-shaking to eliminate unused code
✅optimized for bundle size and compression
✅every additional schema only adds a few extra bytes
✅designed for tree-shaking to eliminate unused code
@valibot.dev `toJsonSchema()`...
✅ is modular (no upfront bundle size cost)
✅ is tiny (adds only ~2 kB to your bundle if used)
✅ granularly configurable to your needs
✅ is modular (no upfront bundle size cost)
✅ is tiny (adds only ~2 kB to your bundle if used)
✅ granularly configurable to your needs
September 3, 2025 at 1:54 PM
@valibot.dev `toJsonSchema()`...
✅ is modular (no upfront bundle size cost)
✅ is tiny (adds only ~2 kB to your bundle if used)
✅ granularly configurable to your needs
✅ is modular (no upfront bundle size cost)
✅ is tiny (adds only ~2 kB to your bundle if used)
✅ granularly configurable to your needs
I've taken some time off from open source, but I'll be back soon with some cool new features for Formisch, Valibot, and Standard Schema. Stay tuned! 🧩
September 2, 2025 at 5:43 PM
I've taken some time off from open source, but I'll be back soon with some cool new features for Formisch, Valibot, and Standard Schema. Stay tuned! 🧩
Thank you @coryty.com for supporting my open-source work with a $100 donation!
August 5, 2025 at 4:04 AM
Thank you @coryty.com for supporting my open-source work with a $100 donation!