A single missing comma or mismatched bracket can break an entire JSON document, and tracking down the exact character is tedious without tooling. This validator parses your JSON and immediately reports whether it is syntactically correct. When something is wrong, it provides a specific error message pointing to the line and character where parsing failed, so you can fix the issue in seconds rather than minutes.
Format, minify, and validate JSON — instantly, in your browser.
Your tidy JSON shows up here
Paste some JSON on the left and hit Format. We'll pretty-print and color-code it for you.
All processing happens entirely in your browser — no data is ever sent to a server.