💻 JSON & Developer Tools

10 tools in this category.

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Format and validate JSON, convert between JSON and CSV, tidy XML, test regular expressions, decode JWTs, convert Unix timestamps and colour codes. Everything runs locally in your browser, so private API data stays private.

Format, beautify and validate JSON online. Find errors with the exact line and column, choose the indent, sort keys or minify.

Minify JSON by removing spaces and line breaks, and see how much smaller it gets. Validates the JSON at the same time.

View JSON as a collapsible tree. Expand and collapse objects and arrays, and click a value to copy its path.

Convert a JSON array to CSV for Excel or Google Sheets. Nested objects are flattened into columns like address.city.

Convert CSV or Excel data to JSON. The first row becomes the keys; numbers and true/false become real values.

Format and validate XML online with proper indentation, or minify it. Shows errors in badly formed XML.

Test regular expressions live: see every match highlighted, capture groups, positions and the result of a replace.

Decode a JSON Web Token to read its header and payload, and see when it was issued and when it expires.

Timestamp Converter

Convert Unix timestamps (epoch seconds or milliseconds) to dates in your time zone, UTC and IST — and dates back to timestamps.

Color Converter

Convert colours between HEX, RGB, HSL, HSV and CMYK with a colour picker, and check contrast on white and black.