JSON Formatter

Pretty-print JSON with configurable indentation, or minify it to a single compact line. Values are preserved exactly; nothing is silently changed.

Private by architecture: All processing is 100% client-side memory. Your data never leaves this browser tab.

Mode

Indent

Sort keys

JSON input

0 lines · 0 charsJSON

Formatted output

0 charsJSON

Example

Compact input:

{"name":"Dimas","active":true,"tags":["json","api"]}

pretty-printed with 2-space indent:

{
  "name": "Dimas",
  "active": true,
  "tags": [
    "json",
    "api"
  ]
}

Does formatting change my data?: No. Values are preserved exactly through JSON.parse and JSON.stringify. Only whitespace and, optionally, key order change.
What does "sort keys" do?: Recursively sorts object keys alphabetically at every nesting level. Off by default, since key order can be meaningful to some consumers.
Does this detect duplicate keys?: No. Per JSON semantics, JSON.parse silently keeps only the last of any duplicate key before this tool ever sees the data.