URL Encoder / Decoder
Encode and decode URLs and query strings — including non-ASCII text and form-style plus signs.
URLs and text you enter are converted in your browser and never sent to a server.
For values embedded in a URL, such as query values or path segments.
Examples
What is this tool?
A free URL encoder/decoder that converts text to percent-encoding and back. It supports three contexts (URL component, full URL and form format) and can process multiple lines at once.
How to use
- Choose Encode or Decode.
- Pick the context that matches your use case.
- Paste your text and press Convert. Use Swap to feed the result back for the reverse operation.
Use cases
- Encoding query parameters that contain spaces, & or non-ASCII characters.
- Decoding percent-encoded URLs from logs or analytics tools.
- Checking whether a value is already encoded or double-encoded.
Notes
- All processing happens locally in your browser.
- Use the line-by-line option to convert multiple values at once.
FAQ
What is the difference between the three modes?
"URL component" encodes a value for use inside a URL (query values, path segments). "Full URL" keeps an existing URL readable and only encodes characters that need it. "Form format" matches HTML form submissions, where spaces become +.
Why does decoding fail with an error?
Decoding fails when a % is not followed by two hexadecimal digits or the input is truncated. The tool also warns you when the input looks double-encoded.
Is my input sent to a server?
No. Encoding and decoding run entirely in your browser.
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