Runs locally
JSON Validator
Check whether JSON is valid and see syntax errors clearly.
Input is processed in your browser and is not uploaded.
Output
Results appear here.This JSON validator is designed for quick checks before pasting data into code, APIs, or documentation. It reports parse errors immediately and keeps the original text local. Lightweight, mobile-friendly, and built for quick repeat use.
FAQ
What does a JSON validator check?+
It checks whether the text follows JSON syntax, including quotes, commas, brackets, and valid values.
Does it support JSON arrays?+
Yes. Valid JSON can be an object, array, string, number, boolean, or null.
Is this safe for private data?+
Validation happens locally in the browser, so Textbun does not store or upload your JSON.