URL Encoder / Decoder

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Percent-encode or decode URLs and query string values instantly. Switch between full URL mode, which preserves structure, and component mode, which safely escapes reserved characters in a single parameter.

Runs in your browser. Nothing is uploaded.

How the URL Encoder Works

The tool uses the browser's native percent-encoding functions for accurate, standards-compliant results.

  1. Choose a mode, Encode to make a string URL-safe, or Decode to read it back.
  2. Pick a scope, full URL keeps : / ? & = working, component mode escapes them.
  3. Convert instantly, results update as you type, with UTF-8 handling for any language.
  4. Copy or chain, copy the output or feed it back to reverse the operation.

Why URL Encoding Matters

Correct encoding keeps links, tracking, and integrations working reliably.

  • Working links, spaces and symbols in URLs break navigation unless they are encoded.
  • Accurate analytics, properly encoded UTM and query parameters keep campaign data clean in GA4.
  • Safe redirects, encode redirect targets passed as parameters to avoid broken or hijacked flows.
  • Reliable APIs, encode values before placing them in query strings so reserved characters do not corrupt requests.

Common Percent-Encodings

CharacterEncodedCharacterEncoded
space%20&%26
?%3F=%3D
/%2F#%23
+%2B@%40

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URL Encoder / Decoder: FAQ

What is URL encoding?
URL encoding, also called percent-encoding, replaces characters that are not allowed in a URL with a percent sign followed by their hexadecimal byte value. For example a space becomes %20. It keeps URLs valid when they contain spaces, symbols, or non-ASCII characters.
What is the difference between encodeURI and encodeURIComponent?
encodeURI is for a full URL and leaves characters like : / ? & = intact. encodeURIComponent is for a single value, such as one query parameter, and escapes those reserved characters too. Use Component mode when encoding a value you will place inside a query string.
When should I use full URL mode versus component mode?
Use full URL mode to encode an entire address while keeping its structure working. Use component mode when you are encoding one piece, such as a search term or redirect parameter, so reserved characters do not break the surrounding URL.
Why does my plus sign turn into %2B or a space?
In query strings a plus can mean a space. To avoid ambiguity, component encoding converts a literal plus to %2B so it is preserved as a plus. When decoding form-style data, a plus may be interpreted as a space, which is why context matters.
Does this handle Unicode and emoji?
Yes. Characters are encoded as UTF-8 percent sequences, so non-Latin scripts and emoji round-trip correctly through both encoding and decoding.
Why did decoding fail with a malformed error?
Decoding fails when the input contains a stray percent sign that is not followed by two valid hex digits, or an incomplete escape sequence. Fix or remove the broken sequence and try again.
Is my input uploaded anywhere?
No. Encoding and decoding run locally in your browser. Your URLs and values are never sent to Web Aloha servers.
Is this URL encoder free?
Yes. It is free, private, requires no signup, and works on any device.

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