URL Encoder / Decoder guide
How to Encode and Decode URLs and Query Values
Encode URL components or complete URLs, decode percent escapes and handle form query values. Understand plus signs, spaces and malformed UTF-8 input.
Open URL Encoder / Decoder →Before you start
- Use a current browser with JavaScript enabled. Read the limits below before using private or large inputs.
Step-by-step instructions
- Paste a value into Input.
- Choose Component for one path or query value; choose Whole URL to preserve URL delimiters.
- Choose Form query value when spaces should use plus signs.
- Click Encode or Decode and inspect the result.
- Copy the result; Clear removes both fields. Use Example to explore without private data.
Interpret results and limitations
Whole URL uses encodeURI/decodeURI and preserves reserved URL separators. Component mode uses encodeURIComponent/decodeURIComponent and treats delimiters as data.
Form query value mode converts spaces to + and decodes + as space. A literal plus encodes as %2B. Malformed escapes, invalid UTF-8 and unpaired Unicode surrogates are rejected. This tool does not fetch or navigate to entered URLs.
Example
Use this example to understand the expected behavior before working with your own input.
Component encode: hello world → hello%20world
Form encode: a+b c → a%2Bb+cTroubleshooting
Decoding fails or a plus sign changes
Check percent escapes and UTF-8 bytes. Choose Component to preserve literal +, or Form query value to treat + as a space.
The interface does not respond
Enable JavaScript, use a supported browser and check the input limits. Reloading clears temporary input and results.
Privacy and cleanup
Inputs and results stay in the current tab. Nothing is uploaded or stored in input history. Optional analytics receives fixed tool identifiers only; entered data, file names and generated values are excluded.
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Related tools and guides
Use URL Encoder / Decoder with the steps above, or continue with a related task.
Technical references
These references explain the underlying formats or browser behavior. The steps above describe the current AnyUtils tool.