JSON Formatter Online: Pretty-Print & Indent in One Click
Online JSON formatter: paste compressed or messy JSON and pretty-print it with clean indentation and line breaks for easy reading. Runs locally, nothing is uploaded.
JSON returned by real APIs is often a single compressed line with no line breaks, making the hierarchy hard to read by eye. JSON formatting (also called beautifying / pretty printing) re-indents, line-breaks, and optionally colors the structure by level.
With this tool, paste any JSON into the input box and click format to get a clean version. If the content has a syntax problem, the tool points out where, so you can fix it before beautifying.
All parsing happens locally in your browser — the text is never sent to a server, which is ideal for logs, configs, or API responses that contain sensitive fields.