Free Online Developer Tools

Fast, private utilities that run entirely in your browser. No signup, no data sent to servers — just paste, convert, and go.

Tools

JSON to TypeScript

Paste JSON, get TypeScript interfaces instantly

Convert SVG markup to valid React JSX components

Render SVG code live and inspect dimensions, colors, paths

Base64 Encode/Decode

Encode or decode Base64 strings in one click

Decode and inspect JWT tokens without sending them to a server

Generate v4 UUIDs for your projects — bulk or single

Color Converter

Convert between HEX, RGB, HSL, and Tailwind colors

Test regular expressions with live highlighting and match details

Convert timestamps to dates and back — seconds or milliseconds

Generate SHA-256, SHA-512, and SHA-1 hashes from any text

SVG to Data URI

Convert SVG to data URIs for CSS backgrounds and inline use

Generate placeholder text — paragraphs, sentences, or words

100% Client-Side

Every tool runs in your browser. Your data never leaves your machine — no server calls, no logging.

No Signup Required

Open any tool and start using it immediately. No accounts, no paywalls, no usage limits.

Fast & Lightweight

Minimal UI, instant results. Built for developers who want to get things done without the bloat.