URL Encoder & Decoder

URL Encoder / Decoder

Convert special characters into a format safe for URLs.

Processed Result
RFC 3986 Safe

Waiting for input...
Output Length: 0 characters
Developer Tip

Special characters like &, =, and ? have special meanings in URLs. To include them as part of a query parameter value, they must be encoded into percent-encoded sequences (e.g., & becomes %26).

Note: We use encodeURIComponent for maximum compatibility with specific parameter values.

URL Processor Guide Guide

How to Use

  1. 1Mode: Select Encode (raw text -> URL-safe) or Decode (URL-safe -> raw text).
  2. 2Input: Type or paste your URL, query parameters, or encoded string.
  3. 3Swap: Quickly use the result as the next input by clicking 'Swap Mode'.
  4. 4Copy: Grab your result immediately for use in your code or browser's address bar.

Formula & Logic

URL encoding (also known as percent-encoding) is a mechanism for encoding information in a Uniform Resource Identifier (URI) under certain circumstances. Characters that are not allowed in a URI must be encoded, starting with a '%' sign followed by two hexadecimal digits.

Input= Unsafe characters (spaces, ?, &, etc.).
HH= Two hexadecimal digits (0-9, A-F) representing the ASCII value.

Practical Applications

API Development

Ensure your query parameters, like search terms or filters, don't break the API endpoint structure.

Data Migration

Convert illegal characters in filenames or database records before using them in a URL-based system.

Deep Linking

Properly format complex app paths and metadata to ensure mobile apps open the correct screen.

Frequently Asked Questions

Q.Why should I encode spaces as %20?

Spaces are not allowed in a URL's path or query section. Most systems use %20 (hex for 32) to ensure the address is readable by all web browsers.

Q.What is the difference between encodeURI and encodeURIComponent?

encodeURI encodes characters for an entire URL but leaves helper symbols (?, &, #, /) alone. encodeURIComponent encodes EVERYTHING except a few basic characters like alphanumeric (A-Z, 0-9).