URL Encoder and Decoder Online
URL encode or decode strings online using encodeURIComponent. Parse query strings, view individual parameters, and encode/decode full URLs instantly — 100% client-side.
Frequently Asked Questions about URL Encoding and Decoding
How do I URL encode a string online?
Paste or type your text into the Encode tab. The URL-encoded output is generated instantly using encodeURIComponent. Click the copy button to copy the result to your clipboard.
How do I URL decode a string online?
Switch to the Decode tab, paste your URL-encoded string, and the original text is decoded instantly in your browser using decodeURIComponent.
What is URL encoding and when do I need it?
URL encoding (percent-encoding) converts characters that are not allowed in URLs into a safe format. For example, spaces become %20 and & becomes %26. It is required when passing special characters in query parameters or form data.
What is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL and preserves characters like :, /, ?, &, and =. encodeURIComponent encodes a URI component (e.g., a single query parameter value) and also escapes those reserved characters. This tool uses encodeURIComponent for maximum compatibility.
Can I parse query string parameters with this tool?
Yes. In the Decode tab, paste a full URL or a query string (e.g., ?key=value&foo=bar). The tool will automatically parse and display each parameter as a key-value pair.
Is this URL encoder secure?
Yes, this tool is 100% client-side. Your data never leaves your browser and is not sent to any server. Everything is processed locally using native browser JavaScript APIs.
Is there a size limit for encoding or decoding?
There is no artificial limit imposed by this tool. The limit is determined by your browser's memory and JavaScript engine. For typical URLs and query strings, encoding and decoding is near-instant.