Paste messy JSON, get clean output instantly. Runs entirely in your browser — your data never leaves your machine.
Open ArcPanel with ⌘⇧K, paste JSON, and format it without switching tabs or breaking your flow.
Your JSON never touches a server. Everything runs in-browser with zero network requests.
Paste any text — ArcPanel detects JSON automatically and offers to format it. Works with clipboard history too.
Move from JSON to JWT, regex, URLs, clipboard history, and color work without leaving the current page.
Yes. ArcPanel is completely free with no ads, no accounts, and no usage limits. The JSON formatter is one of ArcPanel's core page-aware actions.
No. All processing happens locally in your browser. Your JSON data never leaves your machine. There are no analytics, no tracking, and no server-side processing.
Open ArcPanel with ⌘⇧K (or Ctrl+Shift+K on Windows/Linux), search for JSON Formatter, then paste your JSON. You can also route data in from clipboard history or a previous action.
Yes. ArcPanel highlights syntax errors with line numbers and descriptions. You can format, validate, and minify JSON all from the same tool.
Yes — you can try the live ArcPanel demo without installing anything. The Chrome extension adds keyboard shortcut access from any page.
Online formatters pull you into another tab. ArcPanel keeps the formatter beside the page you are already on, keeps your data local, and lets you move straight into related actions like JWT, regex, URL, or clipboard work.
Page-aware side panel for instant browser actions.
Add to Chrome — Free