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Base64 Encoder/Decoder
Encode any text to Base64 or decode a Base64 string back to text. Unicode-safe, browser-side.
Private - runs in your browser
No signup required
Free forever
How to use Base64 Encoder/Decoder
- Paste your text or Base64 string.
- Click Encode or Decode.
- Copy the result.
Features
- Encode / decode
- UTF-8 safe
- In-browser
Why use it
- Useful for data URLs, JWT inspection, embedded images
- No upload
Frequently asked questions
Why is the encoded version longer?
Base64 represents 3 bytes of input as 4 ASCII characters - about a 33% size increase.