Linting is a quick automated check for syntax errors. A linter tells you whether your JSON is valid and points at the exact position of the problem.

Does the linter fix my JSON automatically?

No, but it points at the exact line and column and suggests the likely fix, so most errors are a one-minute correction.

What error hints does it provide?

Common hints include 'check for a missing comma', 'misplaced or extra quote', 'stray bracket', and 'missing closing brace or bracket' when input is cut off.

Is linting safe for sensitive JSON?

Yes. Everything runs locally in your browser — your JSON is never uploaded or stored.

JSON & CSV

JSON Lint & Checker

Paste any JSON and lint it in one click. Valid documents get a clean formatted preview; broken ones get the exact line and column plus a hint about what went wrong.

100% Client-Side — Your Data Never Leaves Your Browser

What is JSON Lint & Checker – Validate JSON Syntax?

Validate JSON syntax and pinpoint every error. Paste any JSON and lint it in one click. Valid documents get a clean formatted preview; broken ones get the exact line and column plus a hint about what went wrong. The tool runs 100% in your browser — nothing is uploaded to a server, so your data stays private, and it is free to use with no signup required.

Quick Answers

What is JSON lint?: Linting is a quick automated check for syntax errors. A linter tells you whether your JSON is valid and points at the exact position of the problem.
Does the linter fix my JSON automatically?: No, but it points at the exact line and column and suggests the likely fix, so most errors are a one-minute correction.
What error hints does it provide?: Common hints include 'check for a missing comma', 'misplaced or extra quote', 'stray bracket', and 'missing closing brace or bracket' when input is cut off.

JSON input

0 chars

Lint report

0 chars

How to use JSON Lint & Checker – Validate JSON Syntax

Paste your JSON into the input box.
A lint report appears instantly — valid or the exact error position.
Copy the report or download it as a text file.

Why use our json lint & checker – validate json syntax?

JSON lint is a fast syntax check for API payloads, config files and test fixtures. This linter parses your input with a strict JSON parser: valid JSON returns a pass report with the document type, item or key count, byte size and a pretty-printed preview; invalid JSON reports the exact line and column of the first syntax error, shows a snippet around it, and suggests the most likely fix (a missing comma, quote or closing bracket). All linting runs locally in your browser, so private schemas and auth payloads never leave your machine.

Frequently Asked Questions

Related Tools

JSON to YAML Converter

Turn JSON objects and arrays into clean, indented YAML in one click.

YAML to JSON Converter

Turn YAML configs into formatted JSON in one click.

JSON to CSV Converter

Convert JSON arrays and objects to clean CSV in one click.

CSV to JSON Converter

Turn CSV tables into formatted JSON in one click.

JSON Formatter & Beautifier

Pretty-print and validate JSON in one click.

JSON Minifier – Remove Whitespace Online

Compress JSON by stripping all unnecessary whitespace.