JSON Toolkit
Format, validate, diff, minify, and convert JSON — six tools for the format everything speaks. All run entirely in your browser.
How these fit together
Start with JSON Formatter for the everyday case — pretty-print a minified blob, or catch a syntax error instantly. When you specifically need to know where a document is broken, JSON Validator reports the exact line and column. JSON Diff compares two documents and shows precisely what was added, removed, or changed — far faster than reading two formatted blobs side by side. JSON Minifier does the reverse of formatting, for when payload size actually matters. And when the data itself needs to change shape entirely, JSON to CSV and CSV to JSON convert between the two formats in either direction.
JSON Formatter
Format, validate and minify JSON online with instant error detection.
JSON Validator
Validate JSON syntax online with exact line and column error reporting.
JSON Diff
Compare two JSON documents and see exactly what was added, removed or changed.
JSON Minifier
Minify JSON online and see exactly how many bytes you saved.
JSON to CSV
Convert a JSON array of objects into a downloadable CSV file.
CSV to JSON
Convert CSV into a clean JSON array, with type inference and nested keys.