URL Encode / Decode - Calculator See


URL Encode / Decode

Encode special characters into percent-encoded (%XX) format or decode percent-encoded URLs into clean human-readable query strings.

Calculator Inputs

Operation.
URL to encode or percent-encoded string to decode.

Calculated Results

Converted URL Output
https%3A%2F%2Fcalculatorsee.com%2Fsearch%3Fq%3Dmortgage%20rates%20%26%20terms
Encoding Standard RFC 3986 UTF-8 Percent-Encoding
Special Characters Escaped 5 Characters (: / ? = &)
Safe for URL Query Strings Yes (100% Safe)
Values calculate live as you adjust inputs.

About URL Encode / Decode

Replaces reserved and unsafe URL characters with a percent symbol (%) followed by their two-digit hexadecimal ASCII/UTF-8 value (RFC 3986).

What is URL Encode / Decode?

Replaces reserved and unsafe URL characters with a percent symbol (%) followed by their two-digit hexadecimal ASCII/UTF-8 value (RFC 3986).

How to Use This Calculator

  1. Select Encode or Decode.
  2. Paste URL or query string.
  3. Copy converted URL-safe output.

The Mathematical Formula & Variables

Spaces -> %20; & -> %26; ? -> %3F; = -> %3D; / -> %2F

Step-by-Step Worked Example

Scenario: Encoding "mortgage rates & terms".

  1. Spaces become %20.
  2. Ampersand (&) becomes %26.
  3. Result = "mortgage%20rates%20%26%20terms".

Result: mortgage%20rates%20%26%20terms

Frequently Asked Questions

What is the difference between + and %20 for spaces?

%20 is standard RFC 3986 percent-encoding for all URL components. The plus sign (+) is only valid for spaces in application/x-www-form-urlencoded query strings.