JSON Formatter
Pretty-print or minify JSON in your browser.
Tool workspace
Pretty-print or minify JSON in your browser. Nothing you paste is uploaded. Invalid JSON shows a parse error when feasible.
How it works
Paste JSON, choose Pretty-print or Minify, then Format. Processing runs entirely in your browser.
Empty input clears the result—no error. Invalid JSON shows a parse error message when the runtime provides one.
Unicode keys and strings are preserved (unescaped where the encoder allows).
Empty input clears the result—no error. Invalid JSON shows a parse error message when the runtime provides one.
Unicode keys and strings are preserved (unescaped where the encoder allows).
Examples
- {"a":1} → pretty multi-line JSON
- Pretty JSON → minify to a single line
Privacy
Privacy: this tool processes JSON locally in your browser. We do not log or store what you paste. Login is not required.
FAQ
Is my JSON uploaded to a server?
No. Formatting runs entirely in your browser.
Do I need an account?
No. All published tools work for guests without login.