Essential Developer Utilities

Fast, browser-based tools for modern developers. Secure, offline-ready, and 100% free.

JSON Formatter & Validator

Clean, format, and validate your JSON strings with ease.

UUID Generator (v4)

Generate secure version 4 UUIDs for your applications.

Unit Converter

Convert length, weight, temperature, and more.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates.

Password Strength

Test your password security and entropy.

IP/CIDR Calculator

Calculate subnets, masks, and usable host ranges.

Privacy-First Policy

We believe your data should stay yours. All DevUtils tools run entirely in your browser using JavaScript. We never store, upload, or even see the data you process here.