Free Online Base64 Encoder & Decoder Tool
Encode and decode Base64 strings instantly with our free online tool. Secure, fast, and works entirely in your browser.
100% Private & Secure✓ Offline Ready
All encoding and decoding happens locally in your browser. Your data never leaves your device.
✨ Auto-processing enabled
?How to Use
- Select Encode or Decode mode
- Paste or type your text in the input field
- For short text (under 1000 chars), see instant results
- For longer text, click the process button
- Use the Swap button to quickly reverse the operation
- Click the copy icon to copy the result to your clipboard
Base64 Encoding & Decoding Explained
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with textual data.
- Encoding: Converts data to Base64 format
- Decoding: Converts Base64 back to original data
- Safety: Not encryption, just encoding
- Use Case: Data transmission and storage
Common Uses
- Data URIs: Embedding images directly in HTML/CSS
- Email: Sending attachments via MIME
- Web Storage: Storing complex data in cookies or URLs
- APIs: Transmitting binary data in JSON
- Authentication: Basic HTTP authentication headers
- Obfuscation: Simple data hiding (not secure encryption)
Frequently Asked Questions about Base64 Encoder / Decoder
Base64 is used to encode binary data (like images or files) into ASCII text. This is useful for embedding images in HTML/CSS or transmitting data over media that are designed to deal with textual data.