Free Base64 Encoder - Instant & Offline
Encode text or data to Base64 format instantly. Secure client-side processing.
Input
TextOutput
Base64Your converted output will appear here
How to Use Free Base64 Encoder - Instant & Offline
The encoder converts each group of 3 bytes into 4 Base64 characters using a 64-character alphabet (A-Z, a-z, 0-9, +, /). Padding with = is added if needed.
🔒 Privacy First: This tool runs entirely in your browser. Your data never leaves your computer.
Common Use Cases
- Embed images directly in HTML or CSS (data URIs)
- Encode binary data for JSON APIs
- Create inline email attachments
- Store binary data in text-based formats
Free Base64 Encoder - Instant & Offline FAQ
Base64 is a binary-to-text encoding scheme that converts binary data to ASCII text. It's commonly used for embedding images in HTML/CSS or transmitting data over text-based protocols.
No, Base64 is encoding, not encryption. Anyone can decode Base64 data. It's used for data representation, not security.
Base64 encoding increases data size by approximately 33% because it represents binary data using only 64 ASCII characters.
Yes! You can encode text directly or upload files to convert them to Base64 strings.