JSON Editor with Validation
A live JSON editor with syntax highlighting, inline error detection, undo/redo and one-click auto-format. Edit JSON safely in the browser.
Edit JSON with confidence
The online JSON editor gives you syntax highlighting, real-time error detection with exact line and column numbers, undo/redo and one-click auto-format. Save your work and generate a shareable public link.
Built on CodeMirror 6, the editor provides the same editing experience you would expect from a local code editor — bracket matching, auto-indent and keyboard shortcuts — without installing anything. Drag and drop a .json file to load it instantly, then edit, validate and share in one workflow.
Frequently asked questions
Does the editor detect errors as I type?+
Yes. The JSON editor highlights syntax and shows the exact line and column of any error in real time, with one-click auto-format.
Can I save and share what I edit?+
Yes. Use Save & Share to store the document and get a public, read-only link (requires a database connection to be configured).
Does the editor validate JSON as I type?+
Yes. The editor uses CodeMirror 6 with a JSON language extension that highlights syntax errors inline as you type. The error panel below shows the line, column and a description of every problem.
Can I import a file?+
Yes. Drag and drop a .json file onto the editor or use the upload button to load a file from your device. You can also paste JSON directly from your clipboard.
What errors does it show?+
The editor surfaces JSON syntax errors such as missing commas, unclosed brackets, unquoted keys and trailing commas. It shows the exact line and column so you can jump straight to the problem.