Base64 Encoder
Encode text and files to Base64 with file upload support.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's called "Base64" because it uses 64 characters: A-Z, a-z, 0-9, plus two additional characters (typically + and /) and the padding character (=).
Base64 encoding is commonly used to encode binary data (like images, files, or binary content) into a text format that can be safely transmitted over text-based protocols like email, HTTP, or stored in text-based formats like JSON or XML.
Our Base64 encoder focuses on safely converting text, files, and binary data into Base64 so they can be transmitted or stored in text-only systems.
Base64 encoding works by:
- Binary Conversion: Converts input data (text or binary) into binary format
- Grouping: Groups binary data into 6-bit chunks (since 2^6 = 64 possible values)
- Character Mapping: Maps each 6-bit chunk to one of 64 ASCII characters
- Padding: Adds padding characters (=) if the input length isn't divisible by 3
- Output: Produces a Base64-encoded string that's safe for text transmission
Base64 encoding lets you safely represent binary data as text for transport and storage. When you need to convert Base64 back to its original form, use the separate Base64 decoder tool. All processing happens in your browser - your data never leaves your device.
Data URLs
Embed images or files directly in HTML, CSS, or JavaScript using data URLs. This eliminates separate HTTP requests but increases file size by about 33%.
Email Attachments
Email protocols (SMTP) are text-based, so binary attachments must be Base64-encoded for transmission. Email clients handle this automatically.
API Data Transmission
APIs often use Base64 to encode binary data in JSON or XML responses. This allows binary data to be included in text-based API formats.
Database Storage
Some databases or systems that only support text storage use Base64 to store binary data. This allows binary content in text-only fields.