Is Base64 encryption?

No. Base64 is an encoding that anyone can reverse, so it does not protect data.

Why does decoding fail?

The input has a character outside the Base64 alphabet, the wrong length, or bytes that are not UTF-8 text. The error gives the position of the bad character where it can.

Encoding & decoding

Base64 Encoder & Decoder

Encode and decode text in Base64, with Unicode support.

Encode text to Base64, or decode Base64 back to text. Text is encoded as UTF-8, so accented letters and emoji work. Processing happens in your browser.

ModeURL-safe alphabet

Text to encode

Base64 output

Type or paste text to encode it.

Privacy: this tool runs in your browser. The data you enter is not sent to a server.

How to use Base64 Encoder & Decoder

Choose Encode text or Decode Base64.
Paste your text or Base64 into the input box.
Copy or download the result. Tick URL-safe alphabet for URLs and JWT-style values.

What is Base64 used for?

Frequently asked questions

Is Base64 encryption?: No. Base64 is an encoding that anyone can reverse, so it does not protect data.
Why does decoding fail?: The input has a character outside the Base64 alphabet, the wrong length, or bytes that are not UTF-8 text. The error gives the position of the bad character where it can.

JSON & data