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Free Desktop App

JavaScriptConverter for Windows

The desktop version of JavaScriptConverter runs the same deterministic AST engine as the online tool — locally, on your machine. Drag a folder in, pick the files you want, and get a TypeScript project out. Your source code never touches our servers.

Download for Windows
Version 3.0 · 65 MB ZIP
Windows 10 or later · No account required

Why use the desktop app?

  • Privacy — conversions run offline. Your code never leaves the machine.
  • Batch scale — convert hundreds of files in a single pass with a real file-tree UI.
  • Per-file diagnostics — see exactly which transforms fired on each file before you commit.
  • No quota — the desktop app is free and has no per-day or per-file limit.
  • Same engine — deterministic AST transforms, identical output to the online tool.

How to install

  1. Click Download for Windows. You'll get JStoTSConverter-Setup.zip.
  2. Right-click the ZIP and choose Extract All….
  3. Open the extracted folder and run JStoTSConverter-Setup.exe.
  4. Windows SmartScreen may prompt because the binary isn't yet code-signed — click More info → Run anyway.
  5. Launch the app from the Start menu and drop in a folder or ZIP to convert.

System requirements

  • • Windows 10 (build 1809) or Windows 11
  • • 64-bit x64 or ARM64 CPU
  • • ~150 MB free disk space
  • • .NET 9 desktop runtime (bundled with the installer)