Articles/JavaScript

"URIError" in JavaScript — What It Means and How to Fix It

What the JavaScript error "URIError" means and how to fix it.

Published October 29, 2026

"URIError" is thrown when a global URI-handling function like decodeURIComponent() is used incorrectly.

Key points

  • Check the browser console's stack trace to find exactly which line and call triggered the error

Example

decodeURIComponent('%')  // URIError: URI malformed
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