zlow
zlow
The blazing fast polyglot toolkit
TypeScript, Kotlin, and Python. For the AI era.
Fast builds
11 ms to transpile zod. The wait is the work, not a toolchain starting up.
One binary
You install zlow. You do not also install Node, a JVM, or CPython just to compile.
We refuse instead of guessing
If we can't compile something correctly, you get a clear error. Never a binary that almost works.
The languages you already write
TypeScript, Kotlin, and Python — same compiler, same honesty about what it supports.
Lightning fast
Same TypeScript. Less waiting.
Fully featured
A faster TypeScript toolchain — transpile, check, bundle, and ship from one binary.
Instant builds
Turn TypeScript into JavaScript in milliseconds, not seconds.
Type checking
Catch mistakes without slowing emit. Check when you want, skip when you do not.
Bundling
Fold a module graph into one file you can ship.
Tree shaking
Drop unused code so the output stays small.
Declarations
Publish a .d.ts for your package from the same tool.
Watch mode
Rebuild as you save, without restarting the toolchain.
Source maps
Debug the TypeScript you wrote, not the JavaScript we emitted.
Your tsconfig
Uses the project file you already have. No second config language.
Modern TypeScript
Current syntax works as written — satisfies, using, decorators, and friends.
JSX
Leave JSX as JSX. No surprise rewrite in the middle of your stack.
Embeddable API
Call the compiler from Node without spawning a process.
Honest errors
If we cannot do it, you get a clear error — never a silent miss.