HappyFormatter
HappyFormatter is a suite of client-side developer utilities designed for formatting, minifying, converting, decoding, hashing, and diffing code directly within the browser. By executing all workflows entirely on the local device, it ensures that sensitive code snippets and data payloads are never uploaded to an external server. It supports multiple languages and formats including JSON, JavaScript, CSS, SQL, Python, and more, providing immediate syntax validation and error highlighting.
Checked on Nov 2, 2026.
Alternative resources
A comprehensive suite of browser-based developer utilities for code formatting, cryptography, data conversion, and system testing.
An open source browser-based collection of developer utilities including JSON, XML, YAML, CSV and TOML formatters, validators, and encoders.
A growing collection of free, client-side developer, text, and productivity tools that run entirely in your browser with zero data tracking.