🔗 URL Encoder / Decoder
Encode or decode URLs and components, and parse query strings into readable key-value pairs.
🔐 Everything is processed locally in your browser. URLs and query strings often contain tokens — nothing is sent to 0Appz or any third party.
📋 Result
How to use this tool
Overview
URL Encoder Decoder - Free Online URL & Query String Tool handles all your URL escaping needs in one place. Encode a single component with encodeURIComponent behavior, encode a full URL preserving its structure with encodeURI, decode percent-encoded strings back to readable text, or switch to Query string mode to break a long URL into a readable table of parameters and values. The swap button lets you use the result as the next input for round-trip checks. Everything runs locally in your browser — nothing is uploaded — which matters because URLs frequently contain API keys, session tokens and personal data. Works on desktop and mobile, in all six languages.Frequently asked questions
What is URL encoding? +
URL encoding (percent-encoding) replaces characters that are not allowed in URLs — like spaces, &, ? and non-ASCII letters — with a % sign and two hexadecimal digits. For example, a space becomes %20.
What is the difference between component and full URL encoding? +
Component encoding (encodeURIComponent) escapes everything except unreserved characters, so it is meant for a single query value. Full URL encoding (encodeURI) keeps the URL structure characters : / ? # & = intact.
Can I decode a full URL with query parameters? +
Yes — use the Query string mode in the URL Encoder Decoder - Free Online URL & Query String Tool to see every parameter as a readable key-value pair, even inside a long URL.
Is my data private? +
Yes. Everything is processed locally in your browser with JavaScript — nothing is uploaded, which matters because URLs often contain API keys and tokens.