Online URL Encoder / Decoder

Search Engine Optimization

URL Encoder / Decoder

Enter the text that you wish to encode or decode:



About URL Encoder / Decoder

  • Input a string of text and encode or decode it as you like.
  • Handy for turning encoded JavaScript URLs from complete gibberish into readable gibberish.
  • If you'd like to have the URL Decoder/Encoder for offline use, just view source and save to your hard drive.
     

URL Encode and Decode Tool

Use the online tool from above to either encode or decode a string of text. For worldwide interoperability, URIs have to be encoded uniformly. To map the wide range of characters used worldwide into the 60 or so allowed characters in a URI, a two-step process is used:

  • Convert the character string into a sequence of bytes using the UTF-8 encoding
  • Convert each byte that is not an ASCII letter or digit to %HH, where HH is the hexadecimal value of the byte

For example, the string: François ,would be encoded as: Fran%C3%A7ois 

(The "ç" is encoded in UTF-8 as two bytes C3 (hex) and A7 (hex), which are then written as the three characters "%c3" and "%a7" respectively.) This can make a URI rather long (up to 9 ASCII characters for a single Unicode character), but the intention is that browsers only need to display the decoded form, and many protocols can send UTF-8 without the %HH escaping.

What is URL encoding?

URL encoding stands for encoding certain characters in a URL by replacing them with one or more character triplets that consist of the percent character "%" followed by two hexadecimal digits. The two hexadecimal digits of the triplet(s) represent the numeric value of the replaced character.

 

Which Characters Are Allowed in a URL?

The characters allowed in a URI are either reserved or unreserved (or a percent character as part of a percent-encoding). Reserved characters are those characters that sometimes have special meaning, while unreserved characters have no such meaning. Using percent-encoding, characters which otherwise would not be allowed are represented using allowed characters. The sets of reserved and unreserved characters and the circumstances under which certain reserved characters have special meaning have changed slightly with each revision of specifications that govern URIs and URI schemes.