JSON Formatter
Paste JSON, then format with indentation, minify to a single line, or validate syntax. Errors are shown inline so you can fix payloads quickly.
JSON input
How to use this tool
Start by pasting raw JSON into the input area. API responses, config snippets, and log lines often arrive as a single compressed line — the formatter makes them readable with consistent two-space indentation. Click Format when you want a pretty-printed view for debugging or documentation.
Use Minify when you need a compact payload for transport or storage. The tool removes unnecessary whitespace while preserving valid structure. Choose Validate when you only need a pass/fail check: valid JSON shows a confirmation message, and invalid input displays the parser error so you can locate the mistake.
Because processing is client-side, you can safely inspect sensitive configuration or tokens during development. For large documents, edit in chunks or minify first to reduce visual noise. Pair this tool with the diff checker when you need to compare two JSON revisions line by line.
Frequently asked questions
- Is my JSON sent to a server?
- No. Formatting, minifying, and validation happen entirely in your browser. Your data never leaves the page.
- What JSON features are supported?
- The tool accepts standard JSON objects and arrays. It uses the built-in JSON parser, so trailing commas and comments are not supported unless you preprocess the input.
- Can I copy the formatted output?
- Yes. Select the output textarea and copy the result, or use your browser's copy shortcut after clicking inside the field.