Vynoe
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URL Encoder & Decoder

Encode special characters for safe URL usage, decode percent-encoded strings, parse URL components, and build query strings.

Method:

text_fieldsDecoded (Plain Text)

linkEncoded (URL Encoded)

buildQuery String Builder

=
https://example.com/path

How URL Encoding Works

percent

Percent Encoding

Special characters are replaced with a percent sign followed by their hex code, like %20 for spaces and %26 for ampersands.

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Safe URL Transmission

URL encoding ensures special characters in query parameters and path segments are transmitted safely across the internet.

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Two Encoding Modes

encodeURIComponent encodes all special characters. encodeURI preserves URL-safe characters like :, /, ?, and #.

When to Use URL Encoding

apiAPI Development

When building REST APIs, query parameters often contain special characters like spaces, ampersands, and equals signs that need encoding to prevent URL parsing errors.

languageInternationalization

Non-ASCII characters in URLs (e.g. Chinese, Arabic, or accented Latin characters) must be percent-encoded to conform to the URI specification (RFC 3986).

Frequently Asked Questions

What is URL encoding?expand_more
URL encoding (also called percent encoding) is the process of converting special characters into a format that can be safely transmitted within a URL. Characters like spaces, ampersands, and non-ASCII characters are replaced with a percent sign followed by their hexadecimal representation (e.g., space becomes %20).
What is the difference between encodeURI and encodeURIComponent?expand_more
encodeURI encodes a complete URI but preserves characters that have special meaning in URLs (like :, /, ?, #, &). encodeURIComponent encodes all special characters, making it suitable for encoding individual query parameter values. Use encodeURIComponent for parameter values and encodeURI for complete URLs.
Why do spaces sometimes appear as %20 and sometimes as +?expand_more
In URL encoding (RFC 3986), spaces are encoded as %20. However, in HTML form submissions using application/x-www-form-urlencoded, spaces are encoded as +. Both representations are widely understood by web servers, but %20 is the standard for URLs.
Is my data safe when using this tool?expand_more
Yes, absolutely. All encoding and decoding happens entirely in your browser using JavaScript. No data is ever sent to any server. You can verify this by using the tool offline or checking your browser network tab.
What characters need to be URL encoded?expand_more
Reserved characters that have special meaning in URLs need encoding when used in data: spaces, !, #, $, &, ', (, ), *, +, ,, /, :, ;, =, ?, @, [, ]. Non-ASCII characters (like accented letters, Chinese characters, emojis) also need encoding.
Can I use this URL encoder for API testing?expand_more
Yes! This tool is perfect for encoding query parameters, path segments, or request body values for API testing. Use the Query String Builder to construct complete URLs with properly encoded parameters that you can paste into Postman, cURL, or your browser.