URL Encoder / Decoder

How to Encode and Decode URLs

1. Encode a full URL — paste a complete URL and click "Encode URL" to make it safe for transport while preserving URL structure characters (/, ?, =, &).
2. Encode a URL component — use "Encode Component" for a single value like a query parameter that may contain /, ?, = or & that need escaping.
3. Decode a URL — paste a percent-encoded string (e.g. hello%20world) and click "Decode URL" to get back the original text.
4. Copy the result — click Copy to copy the output.

Worked Example: Encoding a URL Inside a Query Parameter

The classic mistake: passing a URL as a query parameter without encoding it. Say you want to redirect to https://example.com/page?id=42&lang=en after login:

Wrong (raw URL in the parameter):

https://myapp.com/login?next=https://example.com/page?id=42&lang=en

The server sees lang=en as a parameter of myapp.com, not of the redirect target — the redirect breaks.

Right (encode the component first):

https://myapp.com/login?next=https%3A%2F%2Fexample.com%2Fpage%3Fid%3D42%26lang%3Den

Use Encode Component for the inner URL (it escapes / ? = &), and Encode URL only when encoding a full URL whose structure must stay intact.

URL Encoding Reference Table

The characters most often encoded, per RFC 3986:

Never encoded (unreserved): A–Z a–z 0–9 - _ . ~