Developer Tools

Developer Tools

Free, fast, browser-based utilities for everyday development tasks — each one explains what it does and how to use it, not just a bare input box.

Generators

UUID GeneratorClick below to generate a random, version-4 UUID you can use immediately.

Converters

JSON FormatterPaste your JSON below to format, validate, and beautify it instantly.

Calculators

LLM Token CounterPaste any text or prompt to count tokens across GPT, Claude, Llama, and Gemini tokenizers, and estimate API cost before you send the request.