A lightweight, privacy-first alternative to jsonformatter.org that runs entirely in your browser.
| Feature | foxyyy | jsonformatter.org |
|---|---|---|
| Format / Pretty-print | Yes | Yes |
| Validate JSON | Yes + line/col errors | Yes |
| Minify | Yes + byte savings | Yes |
| Tree view | No (see JSON Path tool) | Yes |
| 100% client-side | Yes — nothing sent to server | Server processing |
| No ads | Yes | Heavy ads |
| No tracking | Yes — zero analytics | Tracks usage |
| Dark mode | Yes | No |
| Multi-language | EN/FR/ES/DE | English only |
| Page weight | ~6 KB | ~800 KB+ |
| Related tools | JSON Path, JSON→TS, CSV→JSON | XML, YAML converters |
Use foxyyy when you want a fast, ad-free JSON formatter that doesn't track you. Paste JSON, format it, copy the output — all in under 6KB. The combo Dev Toolkit also includes JSON formatting alongside Base64, Hash, URL encoding, Regex, and Timestamp tools in one tabbed interface.
Use jsonformatter.org if you need the tree view or built-in XML/YAML conversion. It's a more established tool with a broader feature set, though heavier on ads and page weight.
TRY FOXYYY JSON FORMATTER — FREE, NO ADSfoxyyy is part of a collection of 100+ free developer tools at foxyyy.com. See also: JSON Path Finder, JSON to TypeScript, CSV to JSON, Dev Toolkit.