FormatWell

FormatWell is a fast, privacy-first collection of developer utilities for validating, formatting, and previewing JSON, XML, and Markdown.

Everything runs in your browser. Your data never leaves your device.

Every tool runs entirely in your browser. There is no backend and no analytics that captures your content — the data you paste is never uploaded, logged, or stored on a server. Parsing happens on-device, using Web Workers so large inputs never freeze the interface.