Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text. Handles Unicode and URL-safe Base64. Free, instant and private.
Base64 encode and decode
How to use the Base64 Encoder/Decoder
- Type or paste your text into the Input box.
- Click Encode to Base64 to convert text, or Decode from Base64 to convert Base64 back to text.
- Tick URL-safe Base64 if the result will go in a URL or a token.
- Press Copy result to copy the output.
Frequently asked questions
What is Base64?
Base64 is a way of writing binary data using 64 plain text characters (A-Z, a-z, 0-9, + and /). It lets data such as images or tokens travel safely through systems built for text.
Is Base64 encryption?
No. Anyone can decode it, so it gives no security. Never use it to hide passwords or secrets.
What is URL-safe Base64?
A variant that swaps + for – and / for _ and usually drops the = padding, so the value is safe inside a URL. JSON Web Tokens use it.
Does it handle emoji and non-English text?
Yes. Text is converted to UTF-8 bytes before encoding, so accents, other alphabets and emoji round-trip correctly.
Why does decoding sometimes fail?
The input may contain characters outside the Base64 alphabet, be cut short, or decode to bytes that are not text, such as an image.