JSON Editor
Edit JSON interactively with a visual editor
JSON Editor is a free online tool from BrowserUtils that edit json interactively with a visual editor. It runs entirely in your browser — your data never leaves your device. No account required.
Paste JSON above and click Load to start editing
How to use JSON Editor
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JSON Editor
Free online JSON editor. Edit JSON data interactively — add, delete, and modify keys and values with a visual tree editor that syncs to raw JSON output. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JSON Editor specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript JSON.parse / JSON.stringify (RFC 8259 compliant)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
Can I add nested objects and arrays?
Yes, you can add child nodes to any object or array, change value types between string, number, boolean, null, object, and array, and build complex nested structures visually.
Does the editor validate my JSON?
The editor always produces valid JSON since edits are made through structured controls rather than free text. The raw JSON output updates in real time as you make changes.
Can I use this as an alternative to editing JSON by hand?
Yes, the visual editor eliminates common mistakes like missing commas, unmatched braces, and invalid types. It is especially useful for large or deeply nested JSON files.
Is my data saved between sessions?
No, the editor runs entirely in your browser and does not save data. Copy the output before closing the page if you need to keep your changes.
How do I change a value type in the JSON editor?
Click on any value node and select the desired type from the dropdown (string, number, boolean, null, object, or array). The editor will update the JSON output automatically.
Can I use the JSON editor to build a JSON file from scratch?
Yes, start with an empty object or array and use the visual controls to add keys, values, and nested structures without writing any JSON syntax by hand.
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