Base64 Encoder / Decoder
Encode UTF-8 text to Base64 or decode Base64 back to text — fully client-side.
About the Base64 Encoder / Decoder
Base64 Encoder / Decoder converts arbitrary UTF-8 text into Base64, or decodes a Base64 string back to plain text. Useful for data URIs, JWT debugging, legacy APIs and simple obfuscation.
How to use
- Pick Encode or Decode.
- Paste the input text or Base64 string.
- Press Convert and copy the output.
Benefits & key features
- Unicode-safe in both directions (handles emojis, accents, CJK).
- Uses browser-native
btoa/atobplus TextEncoder. - Zero data leaves the browser — perfect for secret tokens.
- Pairs with Image to Base64 for media, or Base64 to File for binaries.
Pro tip
Base64 is NOT encryption — it's just a different alphabet. Don't use it to hide sensitive data.