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URL Encoder & Decoder

Encode special characters for safe URL transmission, or decode percent-encoded strings back to readable text. Pure client-side, your data never leaves the browser.

  • 100% free
  • No sign-up
  • Clear controls
  • Open and use
encoded
https%3A%2F%2Fexample.com%2Fsearch%3Fq%3Dhello%20world%26lang%3Den
What this tool does
  • Encode special chars for query strings
  • Decode percent-encoded URLs
  • Pure browser — zero server calls
  • Free, no signup, no limits
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The short version

What is URL Encoder & Decoder?

URL encoding (also called percent encoding) converts special characters into a format that can be safely transmitted in URLs.

Characters like spaces, ampersands, question marks, and non-ASCII characters are replaced with percent-encoded equivalents (e.g., space becomes %20, & becomes %26). This is essential because URLs can only contain a limited set of ASCII characters. Without encoding, special characters in query parameters, form data, or path segments can break URL parsing or cause security issues. This tool uses JavaScript's built-in encodeURIComponent() and decodeURIComponent() functions, which handle the full Unicode character set including emojis and international characters. All processing happens in your browser — no data is sent to any server.

URL Encoder & Decoder showing a worked example — Encode special characters or decode percent-encoded URLs. Pure browser.
URL Encoder & Decoder with the built-in example loaded. Free, no sign-up, and the result appears as you type.
Step by step

How to use URL Encoder & Decoder

  1. 1

    Choose encode or decode

    Select Encode to convert special characters to percent-encoded format, or Decode to convert percent-encoded strings back to readable text.

  2. 2

    Enter your text or URL

    Paste a URL with special characters, a query string value, or any text. The output updates instantly as you type.

  3. 3

    Copy the result

    Click Copy to grab the encoded or decoded output for use in your URLs, API requests, or application code.

What's inside

Everything this tool
does for you

  • Encodes all special characters for URL-safe transmission
  • Decodes percent-encoded URLs back to readable text
  • Full Unicode support including emojis and CJK characters
  • Uses standard encodeURIComponent/decodeURIComponent
  • Real-time conversion as you type
  • Runs in your browser — your data never leaves the browser
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