Beautify, compress, validate JSON with syntax highlighting
This page helps developers, QA engineers, and support teams validate JSON, inspect nested payloads, and convert unreadable one-line responses into a format that can be reviewed safely. It is useful when you need to understand an API response before sending it to another teammate or pasting it into documentation.
Paste minified responses from browser devtools, logs, or webhook payloads and turn them into readable structured output.
Catch missing commas, quote issues, trailing characters, or malformed arrays before broken JSON reaches another system.
Escape or unescape JSON strings when you need to prepare test fixtures, request bodies, or serialized messages.
The most common causes are trailing commas, single quotes copied from code examples, or extra text included from logs and email threads.
The core formatting actions are intended to run in the browser, which is one reason this page is useful for quick internal debugging work.