Encoding uses encodeURIComponent and decoding uses decodeURIComponent; the tool does not visit the address.
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Data & developer
URL Encoder & Decoder
Encodes text as a URL component with encodeURIComponent or decodes it. It is safest to work on a single parameter value rather than a complete URL.
✓ Free✓ No account✓ In-browser
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What does this tool do?
Convert query values into safe URL components.
ResultReady
Your result will appear here.
APPLICATION AND DECISION GUIDE
URL Encoder & Decoder: method and usage
Encodes text as a URL component with encodeURIComponent or decodes it. It is safest to work on a single parameter value rather than a complete URL.
Enter one URI component or parameter value to encode, or percent-encoded text to decode. Confirm the shape first with a small example containing no personal data.
The result is a component with reserved characters escaped as percent sequences, or text decoded once.
Practical steps
- Enter a URL component.
- Choose encode or decode.
- Verify the result before using it in a real link.
a+b & page=1 must become a%2Bb%20%26%20page%3D1. Decoding must preserve the original plus sign.
Encoding a whole address also escapes its colon and slashes. The form-decoding rule plus → space does not apply here.
Suitable use cases
- Preparing query parameters
- Inspecting broken links
- Decoding redirect values
URL: distinguish a value from a whole address
This sample is one parameter value. The plus becomes %2B, spaces become %20, and the ampersand becomes %26, preventing it from starting an unintended parameter. Encoding an entire https address also escapes its colon and slashes, so the result is no longer a directly navigable address. Encode the value when building a URL and verify how the destination decodes it.
a+b & page=1a%2Bb%20%26%20page%3D1Input that should fail
%E0%A4%AThe incomplete percent sequence %E0%A4%A must fail. Also, decodeURIComponent("a+b") returns a+b; it does not automatically turn a plus into a space. Confusing form decoding with URI-component decoding can change a search query. Encoding the result twice escapes the percent characters again, so pass a value encoded exactly once to the receiving system.
LEARN THE WORKFLOW
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Frequently asked questions
What input does URL Encoder & Decoder accept?+
Enter one URI component or parameter value to encode, or percent-encoded text to decode. Enter a URL component.
What does URL Encoder & Decoder return?+
The result is a component with reserved characters escaped as percent sequences, or text decoded once. Encoding uses encodeURIComponent and decoding uses decodeURIComponent; the tool does not visit the address.
How should I validate URL Encoder & Decoder output?+
a+b & page=1 must become a%2Bb%20%26%20page%3D1. Decoding must preserve the original plus sign.
Does URL Encoder & Decoder send or store input on a server?+
Tool input is processed in the active tab. Saving to the Workstation or transferring to another tool is a separate choice. Consider browser extensions and shared devices separately; the privacy page explains advertising and network connections.