JSON Validator

Check if JSON is valid and see the exact line and column of any error.

Runs in your browser

Paste JSON to validate

{
  "name": "SolveIt",
  "tools": 38,
  "tags": ["pdf", "image",],
}

Invalid JSON — line 1, column 1. Unexpected token ']', ...", "image",], }" is not valid JSON
Tip: Check the characters just before this position.

   1  {
   2    "name": "SolveIt",
   3    "tools": 38,

Fix trailing commas with API-Ready JSON

How to use JSON Validator

Paste JSON.

Validate.

Jump to the reported line to fix it.

Related workflows

API-Ready JSON

JSON → Minified, validated JSON

Turn messy JSON into a compact, valid API payload.

Validate JSONFormat JSONClean JSONMinify JSON

Readable JSON for Review

JSON → Sorted, formatted JSON

Make JSON easy to read and diff.

Validate JSONSort keysFormat JSON

Config Clean-Up

JSON → Clean config JSON

Tidy a JSON config file.

Validate JSONClean JSONSort keysFormat JSON

JSON to Spreadsheet

JSON → CSV file

Open API data in Excel or Google Sheets.

Validate JSONJSON to CSV

Frequently asked questions

Does it allow comments or trailing commas?

Standard JSON doesn't. The validator reports them as errors, and ‘Clean JSON’ in the API-ready workflow can remove trailing commas.

About this tool

Find the stray comma or missing quote fast. Errors are pinpointed with line, column and a helpful hint.

JSON Validator runs entirely in your web browser. Your data are processed on your own device and are never uploaded to our servers, which makes it safe for personal and business files.