Edit a JSON document without losing track of the change
The JSON editor is for changing a document while keeping syntax feedback close to the source. It supports a local draft workflow with search, undo, formatting, and validation.
When should you use it?
- Correct one field in a sample API response.
- Remove sensitive fields before sharing a fixture.
- Adjust a configuration value and validate it immediately.
Example: change a field safely
Change the source, validate it, and use undo if you need the previous version.
{"enabled":false,"count":2}{"enabled":true,"count":2}Make one logical edit, then validate it
Changing a value is straightforward; adding or removing a member also changes the commas around it. After a structural edit, validate before continuing. Search can help locate repeated names, but a text match alone does not identify which object owns the field. Use the nearby nesting or the tree view to confirm the location.
Review the result as data and as text
Undo is useful during the current editing session, but it is not a saved revision history. Keep an original file when a change needs review, and compare the original with the edited version in JSON Diff. Formatting improves readability; it cannot determine whether the new value is sensible for your application. Use a schema when the edit must preserve a defined contract, then export the approved document.
Make the change. Keep the context.
Work directly in the source editor. Search for a key, edit a value, format the document in place, and undo when you need to return to an earlier version.
Edit the source
Use the left editor; the right pane is a read-only result.
Format in place
The primary action replaces valid input with formatted JSON.
Review and export
Check diagnostics and copy or download the current result.
How do I edit a JSON configuration and export a valid copy?
Paste the current configuration, change the field in the editor, and run validation before copying or downloading. Search and undo help you make a focused change. The tool edits the text in this tab; it does not overwrite the local file you opened.
JSON: a configuration edit
json{
"feature": {"enabled": true, "retryCount": 3},
"environment": "staging"
}After changing enabled or retryCount, validate again. Keep number and boolean values unquoted when the consumer expects those types.
Will the editor save my changes automatically?
No. The current document stays in tab memory during in-site navigation. Download the finished JSON before reloading or closing the tab.
What should you check before using the result?
Edits stay in the tab and are not autosaved to a server or to the original local file. Export the final document before reloading.
Keyboard-first editing
Ctrl or Command + F opens editor search. Ctrl or Command + Enter runs the primary action. Ctrl or Command + Z undoes changes; Shift + Ctrl or Command + Z redoes them. Tab moves focus between controls so keyboard users can leave the editor.
Changes stay under your control
Typing triggers syntax feedback for smaller documents. Large documents run on request. Format-in-place requires valid JSON and is undoable; invalid input is left untouched. Reloading ends the in-memory editing session, so export your work first.
Technical reference: JSON syntax and interoperability · RFC 8259