Developer Tools
URL Encoder / Decoder
Encode a string for safe use in URLs, or decode a percent-encoded URL back to plain text.
Encode special characters in URLs to their percent-encoded equivalents (%20, %2F, etc.) or decode encoded URLs back to human-readable form. Essential for web developers handling query strings, API endpoints, redirects, and SEO-friendly URLs.
Features of the URL Encoder & Decoder
Percent Encoding
Converts special characters (spaces, &, =, #, etc.) to their %XX URL-safe equivalents.
Full URL Decoding
Decodes all percent-encoded sequences in a URL back to readable characters instantly.
Component Mode
Encode individual URL components (path, query, fragment) with the correct encoding rules for each.
Batch Processing
Encode or decode multiple URLs in one pass by pasting multiple lines.
Copy to Clipboard
One-click copy of the encoded or decoded URL result.
How to Use the URL Encoder & Decoder
- Choose 'Encode' or 'Decode' mode.
- Paste your URL or URL component into the input field.
- The encoded or decoded result appears instantly.
- Copy the result and use it in your application or browser.
FAQ
Why do URLs need encoding?▾
URLs can only contain a limited set of ASCII characters. Special characters like spaces, &, and = must be percent-encoded to avoid ambiguity in the URL structure.
What is the difference between encodeURI and encodeURIComponent?▾
encodeURI encodes a full URL and preserves structural characters like / and ?. encodeURIComponent encodes a single component and also encodes those structural characters.
What does %20 mean in a URL?▾
%20 is the percent-encoded representation of a space character. + is also used as a space in query strings.
Is URL encoding the same as URL escaping?▾
Yes, URL encoding and URL escaping refer to the same process of replacing unsafe characters with %XX sequences.
URL Encoding Tips for Developers
- Always encode user-supplied input before appending it to a URL to prevent injection attacks.
- Use encodeURIComponent() in JavaScript for encoding query parameter values.
- The + sign represents a space only in query strings (application/x-www-form-urlencoded), not in URL paths.
- Double-encoding (%2520 for %) can cause subtle bugs — decode once before encoding.
- Reserved characters like /, ?, #, and & have special meaning and should be encoded in values.
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