JSON Editor
Your JSON stays in your browser
Edit JSON in your browser: pretty-print it, minify it, validate it, and browse the same document as an expandable tree. Open a local .json file or paste text. Your JSON stays in your browser and is not uploaded. Formatting uses the DevFoundry JSON engine. For sort, structural stats, and the same actions on the CLI and MCP, use JSON Tools.
Live tool
Client-side onlyYour JSON stays in your browser. Pasted text and opened files are processed locally and are not sent to a server.
Invalid JSON
Text
Tree Edit strings, numbers, booleans, and null
Capabilities
Edit JSON
Pretty print and minify
Live validation
Expandable tree
Open a local file
Surfaces
Browser
