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Base64 and URL encoder and decoder

Runs only in your browser. Nothing is sent to our servers.

Encode and decode Base64, Base64URL and URL-encoded text. Text is handled as UTF-8, so æ, ø, å and emoji survive the round trip.

Result
Which type to choose
  • Base64 is used for Basic auth headers, file content in JSON and many API fields.
  • Base64URL replaces + and / with - and _ and drops the padding. JWTs use it. Decoding accepts both kinds.
  • URL component encodes everything that is not safe in a query value, including &, = and /.
  • Whole URL keeps the characters that give a URL its structure, such as :, /, ? and &.
If decoded Base64 is not text, for example an image or a zip file, the bytes are shown as hex.