Developer tools
Project README builder
Turn project details into a useful Markdown README with setup, tests and limitations.
Open resourceDeveloper tools / FREE RESOURCE
JSON formatter and validator
Format, validate and minify JSON in your browser. Includes clear errors and downloadable output.
2026 edition · By EgoTECH · No login required
Tool processing runs in your browser. This site also loads Google AdSense; its data practices are separate from these tools. Do not paste credentials or sensitive data.
How to use it
Paste a JSON object, array or primitive and choose Format to validate and indent it. JSON requires double-quoted keys, forbids trailing commas and does not support comments.
Limit: 1 MB of text. JavaScript parsing can round integers outside ±9,007,199,254,740,991; store large identifiers as strings. Duplicate keys keep their last value. This is a formatting helper, not a lossless archival tool.
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