Base64 Encoder Online
Convert any text to Base64 encoding instantly. Free online Base64 encoder with support for Unicode, special characters, and URL-safe encoding.
Input
Click to upload or drag and drop
Images, PDFs, text files, JSON, etc.
13 characters
About This Tool
Mode: encode
URL-Safe: No
Base64 encoding converts binary data to ASCII text, making it safe for text-based systems like JSON, XML, and URLs.
Base64 Output
Enter text to see the Base64 encoded result here.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It's used to safely transmit binary data over text-based systems.
Why would I need to encode text to Base64?
Common uses include embedding images in HTML/CSS, sending data through APIs, encoding credentials for HTTP Basic Auth, and storing binary data in JSON or XML formats.
Does Base64 encoding provide encryption?
No, Base64 is NOT encryption. It's simply an encoding scheme that can be easily decoded by anyone. Do not use Base64 to hide sensitive data.
What is URL-safe Base64?
URL-safe Base64 (also called Base64URL) replaces + with - and / with _, and removes padding (=). This makes the output safe for use in URLs and filenames.
Practical Examples
API Authentication
Encode API keys or credentials for HTTP Basic Authentication headers.
Data URI Generation
Convert small files to Base64 for embedding directly in HTML or CSS.
Email Attachments
MIME encoding uses Base64 to attach binary files to email messages.
Common Issues & Solutions
If the output contains + or /, enable URL-safe mode for URL-compatible encoding.
Unicode characters are fully supported - text is converted to UTF-8 before encoding.
Very large texts may slow down your browser. Consider processing in chunks.
The output will be approximately 33% larger than the input due to Base64's encoding ratio.