JSON Validator

Validate your JSON data online by pasting, uploading a file, or providing a URL. Check if your JSON is valid or invalid instantly.

Validation Result

Please paste, upload, or enter a JSON URL to validate.

JSON Validator Online

JSON Validator (JSON Lint) is a user-friendly tool to validate your JSON data. Copy, paste, and validate your JSON in seconds.

JSON is the most widely used data format for API development. It is used by web developers, data scientists, programmers, and students. This tool makes life easier by helping developers quickly validate and navigate JSON data.

The JSON Format Checker logic is powered by a JavaScript library that checks and highlights common errors in your JSON data, ensuring you can fix them quickly.

Most Common JSON Errors:

  • Expecting 'EOF': Occurs when there is a missing or malformed "{", "[", "," etc.
  • Expecting 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '[': Happens when a quote (") is missing.
  • Not closed Array: Missing brackets, commas, or misplaced items in JSON string.

Users can find and resolve these typical errors in microseconds using the JSON validator.

What can you do with JSON Validator?

  • Validate your JSON data easily and quickly.
  • Act as a JSON Checker or Syntax Checker for your JSON format.
  • Load a JSON URL to validate the data hosted online.
  • Upload JSON files and fix them by resolving errors step-by-step.
  • Identify invalid characters in JSON data.
  • Save your validated JSON and share it on social media or via email.

How do I check if a JSON file is valid?

To check if your JSON file is valid, follow these steps:

  1. Open the JSON Validator tool and paste your JSON data into the input editor.
  2. If you have a JSON file, upload it by clicking the Upload File button.
  3. Alternatively, paste the URL of an internet-accessible JSON file by clicking the URL button.
  4. Click the "Validate JSON" button once your data is in the editor or uploaded. The tool will check for errors and display them with detailed line numbers.