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JSON Problems

How to Fix Invalid JSON

Invalid JSON is often caused by a small syntax mistake. Work from the reported error location and inspect the surrounding structure rather than rewriting the entire document.

Format and validate JSON →

Step-by-step

  1. Run the JSON through a validator.
  2. Start at the reported error position.
  3. Check the nearest quotation marks and commas.
  4. Match every opening brace or bracket with its closing character.
  5. Validate the corrected JSON again.

Check quotation marks

JSON strings and property names use double quotes. Smart quotes copied from formatted documents can also cause problems.

Check commas

Object members and array items are separated by commas, but the final member normally does not have a trailing comma.

Check nesting

For deeply nested data, matching opening and closing braces and brackets is easier when the JSON is formatted before you inspect it.

USE THE TOOL

Finish the task with DevUtilityKits

Use the relevant online utility, check the result, and continue with your development workflow.

Format and validate JSON →
FAQ

Frequently asked questions

What is the easiest way to solve this problem?

Invalid JSON is often caused by a small syntax mistake. Work from the reported error location and inspect the surrounding structure rather than rewriting the entire document.

Can I use a DevUtilityKits tool for this?

Yes. Use the related DevUtilityKits tool linked on this page, then follow the workflow described above.