Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used to embed images in HTML/CSS, transmit binary data over text-based protocols, and encode data in URLs.
Base64 encoding is defined in RFC 4648 and is a foundational component of web standards including MIME email (RFC 2045) and Data URIs (RFC 2397). According to HTTP Archive data, over 30% of websites use Base64-encoded data URIs to inline critical assets for faster page loads.
Data URIs
Embed images directly in HTML or CSS
Email Attachments
Encode binary files for email transmission
Storage
Store complex data in cookies or localStorage
API Payloads
Transmit binary data in JSON payloads
How do I encode to Base64?
Paste your text or upload a file and click 'Encode'. The tool converts your content to Base64 format instantly.
How do I decode Base64?
Paste your Base64 string and click 'Decode'. The tool converts it back to the original text or file.
What is Base64 encoding used for?
Base64 is commonly used for embedding images in HTML/CSS, transmitting binary data in JSON/XML, email attachments (MIME), and basic authentication headers.
Can I encode files to Base64?
Yes! Upload any file (images, PDFs, documents) and the tool will convert it to Base64. Perfect for data URIs in web development.
Does this support UTF-8 and special characters?
Yes, the tool properly handles UTF-8 encoding, including emojis and special characters from any language.
Privacy First
All encoding and decoding happens in your browser. Your data never leaves your device.