KATOVIA / TOOLS
JSON Formatter
Validate JSON data and format it for readability.
How it works
Paste JSON and press RUN. Copy the result formatted with two-space indentation. Invalid JSON shows an error; trailing commas and single quotes are not JSON. Input is limited to 131,072 characters. Use this to read API responses and configuration files. Data is processed only in browser memory, with no upload, login or server transfer. Close the tab when finished to remove the data from memory.