ArkType
@arktype.io
TypeScript's 1:1 validator, optimized from editor to runtime ⛵
⭐http://github.com/arktypeio/arktype
👋http://arktype.io/discord
⭐http://github.com/arktypeio/arktype
👋http://arktype.io/discord
95% of ArkType syntax is just TypeScript.
The other 5% are extensions like this that are...
✅composable
✅consistent across data types
✅100% safe with helpful type-level error messages
The other 5% are extensions like this that are...
✅composable
✅consistent across data types
✅100% safe with helpful type-level error messages
December 8, 2025 at 6:57 PM
95% of ArkType syntax is just TypeScript.
The other 5% are extensions like this that are...
✅composable
✅consistent across data types
✅100% safe with helpful type-level error messages
The other 5% are extensions like this that are...
✅composable
✅consistent across data types
✅100% safe with helpful type-level error messages
once you go type("string") you never go z.back()
December 5, 2025 at 5:22 PM
once you go type("string") you never go z.back()
Difficulty of Parsing Regex with TypeScript Types
------------------------------------------------------------
group associativity ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
everything else ▒▒
------------------------------------------------------------
group associativity ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
everything else ▒▒
December 2, 2025 at 5:51 PM
Difficulty of Parsing Regex with TypeScript Types
------------------------------------------------------------
group associativity ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
everything else ▒▒
------------------------------------------------------------
group associativity ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
everything else ▒▒
In the next version of ArkType, any Standard Schema is a valid definition.
Zod migration is about to get a whole lot easier🚀
Zod migration is about to get a whole lot easier🚀
December 1, 2025 at 6:39 PM
In the next version of ArkType, any Standard Schema is a valid definition.
Zod migration is about to get a whole lot easier🚀
Zod migration is about to get a whole lot easier🚀
fastest, cleanest tuple validation around
November 26, 2025 at 3:53 PM
fastest, cleanest tuple validation around
RIP z.shark()
long live sharktype
long live sharktype
November 24, 2025 at 5:53 PM
RIP z.shark()
long live sharktype
long live sharktype
friends don't let friends have unsafe regex
November 20, 2025 at 5:53 PM
friends don't let friends have unsafe regex
coming in ArkType 2.2...
e(x)ec mode for regex literals🧑🍳
e(x)ec mode for regex literals🧑🍳
November 19, 2025 at 6:03 PM
coming in ArkType 2.2...
e(x)ec mode for regex literals🧑🍳
e(x)ec mode for regex literals🧑🍳
📈arkregex just hit 100k installs/week📈
if you're still using untyped RegExp() you may as well just write raw .js
if you're still using untyped RegExp() you may as well just write raw .js
November 18, 2025 at 5:24 PM
📈arkregex just hit 100k installs/week📈
if you're still using untyped RegExp() you may as well just write raw .js
if you're still using untyped RegExp() you may as well just write raw .js
string validation has never been this easy
arktype🤝arkregex
arktype🤝arkregex
November 13, 2025 at 5:31 PM
string validation has never been this easy
arktype🤝arkregex
arktype🤝arkregex
problem:
your RegExp is beyond human comprehension
solution:
pnpm i arkregex
your RegExp is beyond human comprehension
solution:
pnpm i arkregex
November 12, 2025 at 6:13 PM
problem:
your RegExp is beyond human comprehension
solution:
pnpm i arkregex
your RegExp is beyond human comprehension
solution:
pnpm i arkregex
I'll take "meticulously typed regex features you probably didn't know existed" for $500
November 10, 2025 at 7:02 PM
I'll take "meticulously typed regex features you probably didn't know existed" for $500
in the latest version of arktype:
regex properties and index signatures from arkregex🔒
regex properties and index signatures from arkregex🔒
November 7, 2025 at 3:26 PM
in the latest version of arktype:
regex properties and index signatures from arkregex🔒
regex properties and index signatures from arkregex🔒
imagine using untyped regex in 2025
November 6, 2025 at 1:42 PM
imagine using untyped regex in 2025
arkregex is ridiculously optimized.
even expressions like this are inferred instantly.
but what about the most extreme cases?🧵
even expressions like this are inferred instantly.
but what about the most extreme cases?🧵
November 5, 2025 at 2:26 PM
arkregex is ridiculously optimized.
even expressions like this are inferred instantly.
but what about the most extreme cases?🧵
even expressions like this are inferred instantly.
but what about the most extreme cases?🧵
new RegExp():
❌types
😴tired
arkregex:
✅types
🫨wired
❌types
😴tired
arkregex:
✅types
🫨wired
November 3, 2025 at 5:44 PM
new RegExp():
❌types
😴tired
arkregex:
✅types
🫨wired
❌types
😴tired
arkregex:
✅types
🫨wired
📢Introducing ArkRegex📢
a drop in replacement for new RegExp() with types ⬇️
a drop in replacement for new RegExp() with types ⬇️
October 28, 2025 at 4:38 PM
📢Introducing ArkRegex📢
a drop in replacement for new RegExp() with types ⬇️
a drop in replacement for new RegExp() with types ⬇️
new to typescript?
here's a handy little type for parsing regular expressions:
here's a handy little type for parsing regular expressions:
October 9, 2025 at 4:45 PM
new to typescript?
here's a handy little type for parsing regular expressions:
here's a handy little type for parsing regular expressions:
🙅convoluted regex
👍simple types
👍simple types
October 7, 2025 at 4:42 PM
🙅convoluted regex
👍simple types
👍simple types
the days of untyped regex are numbered
October 6, 2025 at 4:44 PM
the days of untyped regex are numbered
Ever get mixed up about unions and intersections?
ArkType has your back🫡
ArkType has your back🫡
September 24, 2025 at 4:20 PM
Ever get mixed up about unions and intersections?
ArkType has your back🫡
ArkType has your back🫡
"any sufficiently advanced typescript types are indistinguishable from magic" - Arthur C. Clark, 1962
September 23, 2025 at 4:10 PM
"any sufficiently advanced typescript types are indistinguishable from magic" - Arthur C. Clark, 1962
Like type-safe environment variables?
Now there's a better way to get them with arkenv⛵❤️
Now there's a better way to get them with arkenv⛵❤️
September 22, 2025 at 4:24 PM
Like type-safe environment variables?
Now there's a better way to get them with arkenv⛵❤️
Now there's a better way to get them with arkenv⛵❤️