JSON Editor — Edit, Format & Validate JSON Online
A full-featured online JSON Editor. Type or paste JSON, auto-validate in real time, format, minify, copy, download, or upload JSON files — all in the browser.
JSON Editor
What is a JSON Editor?
A JSON Editor is an interactive tool for writing, editing, formatting, and validating JSON data directly in your browser — no installation required.
This editor auto-validates your JSON as you type, highlights errors, and provides one-click formatting and minification.
How to Use
Type or paste JSON
Start typing JSON directly into the editor, or paste existing JSON. The editor validates your input in real time.
Use toolbar actions
Click Format to pretty-print, Minify to compact, Copy to copy to clipboard, Download to save as a file, Upload to load from a file, or Clear to reset.
Check the status bar
A status bar below the editor shows whether your JSON is valid or displays the error message.
Frequently Asked Questions
Does the editor validate JSON in real time?
Yes. The editor uses a 300ms debounce to validate your JSON as you type, showing a green "Valid JSON" or red "Invalid JSON: <error>" status.
Can I load a JSON file from disk?
Yes. Click the Upload button to open a file picker and load any .json or .txt file into the editor.
Is my data processed on a server?
No. Everything runs entirely in your browser. Your data is never sent anywhere.