JSON Editor
Edit JSON with real-time validation, a collapsible tree view, format/minify, and file import — all in your browser.
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Edit JSON with real-time validation, a collapsible tree view, format/minify, and file import — all in your browser.
In short: A JSON editor lets you write and modify JSON directly with real-time validation that flags syntax errors as you type — unlike a viewer, which is read-only. RealJSON's editor combines an editable text area with a collapsible tree view, format/minify shortcuts, and file import/export, all running locally in your browser.
A JSON editor is more than a text box. RealJSON's free online JSON editor combines a powerful code editor with real-time validation, a collapsible tree view, and format/minify shortcuts — all running locally in your browser with no server required.
Every keystroke is checked against the JSON specification. Errors appear inline as you type with exact position information, so you never have to wonder why your JSON won't parse. Fix problems as you write, not after.
Clean up messy JSON with one click using the built-in formatter, or strip it down to a compact payload with the minifier. You don't need to switch tools mid-workflow.
Load any .json file directly from your machine. When you're done editing, download the result or copy it to the clipboard. Everything stays local — your data never leaves your browser.
The JSON editor is the right tool when you need to modify JSON — not just view or format it. Use it to edit API fixtures before running tests, modify configuration files without opening a full IDE, clean up and reformat JSON from external sources, or add and remove fields from a document interactively.
Paste your JSON or load a .json file, edit it directly — errors are flagged inline in real time — then format, minify, copy, or download the result.
A viewer is read-only, for exploring JSON as a collapsible tree. An editor lets you modify the JSON directly, with real-time validation flagging syntax errors as you type.
Yes. Every change is checked against the JSON specification, with syntax errors highlighted inline and exact position information shown.
Yes. Load any .json file from your device to start editing, then download the result or copy it to your clipboard when you're done.
No. The editor runs entirely in your browser — your JSON stays on your device throughout.
When viewing (not editing) is enough, the JSON Viewer is faster. For quick formatting without editing, use the JSON Formatter. To validate without modifying, the JSON Validator gives detailed error reporting.
Browse all free JSON tools →
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