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JSON Validator & Syntax Inspector

Inspect and validate JSON payloads with line-accurate errors.

How to use JSON Validator & Syntax Inspector step by step

1. Paste your input into the JSON Validator & Syntax Inspector editor.
2. Configure the options for encoding, formatting or validation.
3. Run the tool and read the output or any errors it reports.
4. Copy the result back into your editor.

Why use this developer tools tool

• JSON Validator & Syntax Inspector runs entirely inside your browser, so your file is never uploaded and nothing is logged.
• JSON Validator & Syntax Inspector is one of 570 tools in Developer Tools, next to JSON Formatter & Validator when the related job needs doing too.

Frequently asked questions

Is JSON Validator & Syntax Inspector free to use?

Yes. JSON Validator & Syntax Inspector has no usage limit, no sign-up and no paywall.

Can I use JSON Validator & Syntax Inspector on a phone?

Yes. KPM Tools is built to work on a phone as well as a desktop, so you can run JSON Validator & Syntax Inspector without installing anything.

What is JSON Validator & Syntax Inspector used for?

JSON Validator & Syntax Inspector covers json validator & syntax inspector, developer and online tool.

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