Base64 Encoder & Decoder
Encode and decode Base64 strings online. Free Base64 converter with UTF-8 support, file encoding, and instant conversion for developers.
About Base64 Encoder & Decoder
Base64 encoding is a method to convert binary data into ASCII text format. This free online tool helps you encode text to Base64 or decode Base64 strings back to their original form.
Key Features
- Bidirectional Conversion: Encode to Base64 or decode from Base64
- UTF-8 Support: Handles all Unicode characters correctly
- Real-time Conversion: Instant results as you type
- Copy to Clipboard: One-click copying of encoded/decoded output
- Error Detection: Clear error messages for invalid Base64 input
- No Data Storage: All processing happens locally in your browser
Common Use Cases
- Encode authentication credentials
- Embed images in HTML/CSS (Data URLs)
- Encode binary data for APIs and JSON
- Decode Base64 strings from API responses
- Convert text for email headers (MIME)
What is Base64?
Base64 is an encoding scheme that converts binary data into a text format using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It’s commonly used to transmit binary data over text-based protocols like HTTP and SMTP.
FAQ
Why does my encoded string have = at the end?
The = character is padding used to ensure the encoded string length is a multiple of 4.
Is Base64 encryption? No! Base64 is encoding, not encryption. Anyone can decode Base64 strings. Never use it for sensitive data without proper encryption.
What character sets are supported? This tool supports UTF-8, which includes all Unicode characters including emoji.