Base64 Encoder / Decoder
Encode or decode Base64 safely, including emoji and non-Latin text. Encode text to Base64 or decode Base64 to text. Full unicode support, URL-safe variant and error detection. Free online Base64 converter.
About the Base64 Encoder / Decoder
Base64 turns binary-safe text into plain ASCII, which is how images are embedded in HTML, tokens are transmitted in APIs, and data is smuggled through systems that only accept text. This converter handles the full unicode range correctly — emoji and non-Latin scripts that naive converters mangle — offers the URL-safe alphabet used by JWTs, and clearly reports invalid input instead of guessing. Encode and decode in the same box, instantly.
How to use the Base64 Encoder / Decoder
- Paste your text (to encode) or Base64 string (to decode).
- Pick Encode or Decode.
- Enable URL-safe mode if you are working with JWTs.
- Copy the converted result.
Key features
- Unicode-safe encoding and decoding
- URL-safe Base64 variant (for JWTs and URLs)
- Invalid-input detection with clear messages
- Swap direction with one click
Why do some Base64 strings contain "-" and "_"?
Is Base64 encryption?
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