Validation and formatting
Paste or drag a JSON file into the input pane. The tool instantly validates the syntax. If the input is invalid, it isolates the exact error and displays the line and column number.
Valid data is automatically formatted in the output pane. You can use the tool as a JSON beautifier to pretty print JSON payloads, adjusting the indentation to two spaces, four spaces, or tabs. Checking the minify option strips all whitespace to compress the output. Enabling key sorting alphabetically orders every object key recursively, producing stable diffs for version control.
Auto-fixing rules
The JSON validator applies a few common fallback fixes before failing. If your input contains unquoted keys or trailing commas, the tool attempts to repair them automatically and parse the result. If the repair succeeds, the output pane displays the strict, corrected JSON.
YAML conversion
Switch the output mode to YAML to translate the parsed data. The YAML converter uses the same sorted keys if enabled. Minification and tab-based indentation are disabled in this mode, as YAML enforces its own space-based indentation rules.
File export
The input and output panels display byte sizes and line counts for comparison. You can copy the result directly to your clipboard or download it as a standalone file. Downloads use the .yaml, .json, or .min.json extension depending on the active settings.