Converters · FREE ONLINE TOOL
URL Encoder & Decoder
Encode special characters for safe URL transmission or decode percent-encoded URLs. Free online tool for developers. No signup required.
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How to use URL Encoder & Decoder
- Choose "Encode" to convert text to URL-safe format, or "Decode" to convert back
- Paste your URL or text into the input field
- View the encoded/decoded result instantly
- Click "Copy" to copy the result
- For query parameters, encode each value separately before constructing the URL
Examples & practical tips
- "Hello World" → Hello%20World (space encoded)
- "search?q=test&lang=en" → search%3Fq%3Dtest%26lang%3Den (full encoding)
- "Café" → Caf%C3%A9 (UTF-8 character encoding)
- Decode: %E2%9C%93 → ✓ (Unicode checkmark)
About URL Encoder & Decoder
Safely encode and decode URLs with our free online URL Encoder/Decoder. URL encoding (also called percent encoding) converts special characters into a format that can be safely transmitted in URLs, preventing broken links and ensuring data integrity.
Why URL Encoding Matters: URLs can only contain a limited set of ASCII characters. Characters like spaces, ampersands (&), question marks (?), and international characters must be encoded to be transmitted correctly. Without proper encoding, URLs can break, data can be lost, and security vulnerabilities can emerge.
Characters That Require Encoding: - Space → %20 (or + in query strings) - Ampersand (&) → %26 - Question Mark (?) → %3F - Equals (=) → %3D - Slash (/) → %2F - Hash (#) → %23 - International Characters → Multiple %XX sequences
Tool Features: - Full URL Encoding: Encode entire URLs including path and query - Component Encoding: Encode specific parts like query parameters - Reliable Decoding: Decode any percent-encoded URL - UTF-8 Support: Properly handles Unicode and international characters - Real-Time Processing: See results as you type
URL encoding is essential for web developers building APIs, constructing query strings, handling user-generated content in URLs, and ensuring cross-platform compatibility. Our tool handles edge cases and international characters correctly, following RFC 3986 standards.
When this comes in handy
- Building query strings for API requests
- Encoding user input before adding to URLs
- Creating shareable links with special characters
- Debugging encoded URLs from logs or analytics
- Handling international characters in URLs
- Encoding form data for GET requests
Frequently asked questions
When should I encode a URL?
Encode whenever you're adding user-generated content or special characters to a URL. Query parameter values should always be encoded. Path segments with special characters need encoding too.
What's the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL but preserves reserved characters like /, ?, &. encodeURIComponent encodes everything except alphanumeric characters, used for encoding individual parameter values.
Why are spaces sometimes encoded as + and sometimes as %20?
Both are valid. %20 is the standard URL encoding. The + symbol is an older convention specifically for application/x-www-form-urlencoded content (HTML forms). Our tool uses %20 for broader compatibility.
Can double-encoding cause problems?
Yes! If you encode an already-encoded string, %20 becomes %2520. Always decode first if unsure whether a string is already encoded. Check if your string contains % signs followed by two hex digits.
How does URL encoding handle emojis?
Emojis and other Unicode characters are first converted to UTF-8 bytes, then each byte is percent-encoded. A single emoji can result in 12 or more encoded characters (4 bytes × 3 characters each).
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