Paste JSON to format, validate, or minify it — with syntax highlighting and exact error line numbers. Everything runs locally in your browser.
Result will appear here…
Paste any JSON string into the Input panel. Click Format to prettify it with syntax highlighting and your chosen indentation (2 or 4 spaces). Click Minify to compress whitespace for production payloads. If the JSON is invalid, the error message shows the exact line and column where parsing failed so you can fix it quickly.
Pasting JSON auto-formats it immediately — no button click needed. Click Copy to copy the clean output to your clipboard. Everything runs in your browser: no data is sent to any server, so it's safe with API responses, config files, and private data.
Is my JSON data uploaded anywhere?
No. Formatting, validation, and minifying all happen locally in your browser with JavaScript. Nothing you paste is sent to a server, which makes it safe for API responses, config files, and other private data.
Does it support comments or trailing commas (JSON5)?
No, this tool validates strict JSON per the JSON spec. Comments and trailing commas will show as a syntax error with the exact line and column so you can fix or strip them.
What's the difference between Format and Minify?
Format adds indentation and line breaks for readability. Minify strips all whitespace to produce the smallest possible payload for production use.
Is there a size limit on the JSON I can paste?
There's no hard limit set by the tool itself, but very large payloads (several MB) may slow down formatting since everything runs in your browser tab rather than on a server.
TextForge is a free Chrome extension that transforms, cleans, and extracts text from any webpage — including JSON extraction from API responses — without ever leaving your tab.
Get TextForge — Free on Chrome Web Store →