Tools / Base64
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text. Everything runs in your browser — nothing is uploaded to a server.
Press Ctrl / ⌘ + Enter to convert. No data leaves your device.
What is Base64?
Base64 is a way to represent binary data using 64 printable characters. It is commonly used to embed images in JSON or CSS, attach files to text-based protocols, and pass complex data through URLs.
How to use this tool
- Choose Encode or Decode.
- Paste your text (or Base64 string) into the input box.
- Click Convert — the result appears instantly on the right.
- Copy or download the result.
FAQ
Is Base64 the same as encryption?
No. Base64 is an encoding, not encryption. Anyone can decode it, so never use it to protect passwords or sensitive data.
Is my data uploaded anywhere?
No. All conversion happens in your browser with JavaScript. Nothing is sent to a server.
Why is the Base64 result longer?
Base64 turns every 3 bytes into 4 characters, so the output is roughly 33% longer than the input.
Does it support Chinese, Japanese and emoji?
Yes. The tool uses UTF-8, so CJK characters, emoji and any Unicode text convert correctly.