How to use: JSON Validator
JSON Validator is a free online JSON Tools tool that check JSON syntax and pinpoint the exact error position instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
How to use
Using JSON Validator takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Description
Check JSON syntax and pinpoint the exact error position.
Because everything is computed client-side, JSON Validator is safe to use with sensitive data such as API keys, tokens or private logs.
Run
These ready-made examples show typical inputs and the exact output JSON Validator produces for them.
Examples
Reports the exact error position.
{"broken": [1,2,}
Use cases
Common situations where JSON Validator helps:
- Check JSON syntax and pinpoint the exact error position.
- Because everything is computed client-side, JSON Validator is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is JSON Validator?
JSON Validator check JSON syntax and pinpoint the exact error position. It runs entirely in your browser, so your data stays private.
Is JSON Validator free to use?
Yes. JSON Validator is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.