A practical JSON toolkit for formatting, validating, repairing, flattening, comparing, converting, and exploring JSON.
Backend developers, frontend developers, API testers, QA engineers, and students.
JSON tasks often start as debugging work: malformed responses, unreadable payloads, nested API exports, and schema mismatches.
Find broken JSON syntax, understand the error, and fix the payload in your browser without uploading private data.
Check whether an API response is valid JSON before debugging the client, schema, or integration code.
Learn when to minify JSON for transport and when to beautify JSON for review, debugging, and documentation.
Turn nested JSON arrays and objects into spreadsheet-ready CSV with clear dotted column names.
