Encode or decode a URL component safely.
Prepare a value for use in a URL query parameter, or decode percent-encoded text into a readable form.
Encode the value you want to place inside a URL parameter so spaces and reserved characters do not accidentally change the URL's structure. Keep the surrounding parameter names, equals signs, and separators outside the encoded value.
Decode percent-escaped text copied from a development workflow to make it readable. The result is displayed as plain text, so decoding a value does not navigate to a website or execute content.
This uses encodeURIComponent, which also encodes slashes and colons. Encode individual parameter values, rather than an entire URL you want to navigate to.
coffee & tea
coffee%20%26%20tea
Spaces become %20 and the ampersand becomes %26. These escapes help keep the value distinct from query-string separators.
Check for incomplete percent escapes or invalid UTF-8 byte sequences. A stray percent sign is not automatically a valid encoded character.
This tool uses component encoding, which encodes slashes and colons as well. Encode individual parameter values instead of a complete URL that you want to remain directly navigable.
A little clarity before you get started.
No. This tool decodes percent escapes. Form-encoded plus signs are a different convention.
No. The tool uses encodeURIComponent for a value within a URL. It encodes reserved characters that would otherwise separate parts of a complete address.
The decoder handles percent escapes. In form-encoded data, plus can represent a space, but that is a separate convention. This page does not apply that form-specific substitution.
Yes. Component encoding represents Unicode text with UTF-8 percent escapes. Decoding requires valid percent-encoded sequences that form valid text.
Percent signs in the first encoded result are encoded again. For example, %20 becomes %2520. Decode the corresponding number of times only when your workflow actually uses nested encoding.
No. This tool is free to use without signing in. An account lets you keep a list of favorite tools.
Yes, with a current browser. File support, download behavior, and available memory vary by device. For large documents and images, a computer is often more comfortable.