Data
JSON Toolkit
Format, validate, visualize, query, diff, flatten, convert, and generate types from JSON locally.
Client-side only
Processing is local to this browser. DevPaste does not upload pasted content, JWTs, .env values, editor contents, or HMAC secrets to a server.
Everything runs locally in your browser. Your JSON is not uploaded.
JSON Input
Shared input for every JSON Toolkit tab. Editor content is not saved by default.
Monaco
JSON actions
Format Output
Pretty print, minify, sort keys recursively, or escape and unescape JSON strings.
The tool accepts both JSON strings and raw escaped text.
Try: hello\nworld, {\"name\":\"John\"}, "C:\\Users\\Example\\Documents", or "Line1\nLine2".