Built for developers who just want the tool to work.

DevWrench is an indie collection of browser-based developer tools focused on speed, clarity and privacy.

What DevWrench is

DevWrench is a growing set of small, focused utilities for common developer workflows: converting JSON to TypeScript interfaces, turning cURL commands into Fetch code, flattening nested JSON into CSV, comparing JSON files, and inspecting large CSV files without lag.

Why it exists

Too many online dev tools are cluttered, slow, full of ads, or built around forced uploads and account flows. DevWrench is meant to feel simpler: open the page, paste your data, get your result, move on.

Core principles

Runs in the browser whenever possible
No accounts required
No unnecessary tracking
Clear outputs for real developer use cases
Fast interfaces with minimal friction