Base64 Encoder
Encode text to Base64 format instantly. Perfect for data transmission, image embedding, and API authentication.
What is Base64 Encoder?
The Base64 Encoder converts plain text into a Base64 encoded string. It handles the full Unicode range including emojis and accented characters by using UTF-8 encoding before the Base64 conversion. The tool shows character counts for both input and output and lets you copy the result with one click. All processing happens in the browser.
This tool takes plain text, encodes it to UTF-8 bytes, then converts those bytes to Base64 using the browser's btoa function with UTF-8 handling. The output is a standard Base64 string containing only A-Z, a-z, 0-9, +, /, and = padding characters.
Key Features
- Instant text to Base64 conversion
- Full Unicode and UTF-8 support
- Handles emojis and accented characters
- Character count for input and output
- Copy encoded text to clipboard
- Quick example presets
- Runs in the browser with no uploads
- No text length limit
Common Use Cases
Encoding credentials for API headers
Convert a username and password to Base64 for use in an HTTP Basic Authentication header.
Storing values in config files
Encode text values to Base64 for storage in environment variables or YAML configuration files.
Preparing data for JSON payloads
Encode text that may contain special characters so it passes cleanly through JSON serialization.
Creating encoded test data
Generate Base64 strings for unit tests that expect encoded input.
How to Use This Tool
Enter your text
Type or paste plain text into the input area.
Encode
Click Encode. The tool converts the text to Base64 instantly.
Copy the result
Copy the Base64 string for use in your code, API request, or configuration.
Pro Tips
- 1
Base64 encoding increases size by about 33 percent.
- 2
Base64 is not encryption. It is encoding for safe text transmission.
- 3
The equal signs at the end are padding and are required for valid Base64.
- 4
The tool handles emojis and international characters correctly via UTF-8.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding that represents data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It is used to safely transmit binary data over text-based protocols.
Is Base64 the same as encryption?
No. Base64 encoding is not encryption. Anyone can decode a Base64 string back to the original text. For security, use proper encryption algorithms.
Can I encode emojis and special characters?
Yes. The tool uses UTF-8 encoding before the Base64 conversion, so emojis, accented characters, and other Unicode text are handled correctly.
How much larger does the output get?
Base64 encoding increases the size by approximately 33 percent. Every 3 bytes of input becomes 4 bytes of output.
Is my text sent to a server?
No. All encoding happens in your browser using JavaScript. The text never leaves your device.