zigtsc

A compiler written in Zig that transpiles a strict subset of TypeScript directly to idiomatic C. No Wasm intermediate. No runtime. Just clean C output.

TypeScript syntax→ C outputWritten in Zig

git clone https://github.com/nathanjmorton/zigtsc && cd zigtsc && zig build -Doptimize=ReleaseFast

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Requires Zig 0.16.0 · GitHub · Docs

TypeScript in, C out

fib.ts

function fib(n: number): number {
    if (n <= 1) {
        return n;
    }
    return fib(n - 1) + fib(n - 2);
}

const result: number = fib(10);
console.log(result);

fib.c (generated)

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>

double fib(double n);

double fib(double n) {
    if ((n <= 1)) {
        return n;
    }
    return (fib((n - 1)) + fib((n - 2)));
}

int main(void) {
    const double result = fib(10);
    printf("%g\n", result);
    return 0;
}

Features

Direct TS → C

No Wasm intermediate like Porffor. Generates idiomatic, readable C you can inspect and modify.

Written in Zig

Fast compiler with zero runtime dependencies. Single binary, cross-platform.

Type-driven codegen

number → double, boolean → bool, string → const char*, interface → typedef struct.

console.log → printf

Format strings inferred from types. Strings use %s, numbers use %g, booleans use %d.

Explicit subset

No classes, closures, async, generics, or eval. Designed constraints for clean C mapping.

Pairs with zigc

Output .c files can be built with zigc, zig cc, gcc, or clang. Full C toolchain compatibility.

Quick start

git clone https://github.com/nathanjmorton/zigtsccd zigtsc && zig build -Doptimize=ReleaseFast./zig-out/bin/zigtsc examples/fib.ts fib.ccc -o fib fib.c && ./fib

Read the full docs →