Base64 Encoder/Decoder

Base64 encoding is essential for data transmission and storage. Developers use it for API requests, data URLs, and authentication headers. Web designers use it for embedding images in HTML/CSS. Email systems use it for attachments. Security professionals use it for encoding sensitive data. Our tool provides instant encoding and decoding with support for Unicode, emojis, and binary data, making it perfect for web development, API integration, email handling, and any application requiring safe data transmission.

Base64 converts binary data to ASCII text using 64 characters. Process: 1) Convert data to binary, 2) Split into 6-bit chunks, 3) Map each chunk to Base64 character, 4) Add padding if needed. Character Set: A-Z (0-25), a-z (26-51), 0-9 (52-61), + (62), / (63), = (padding). Size Increase: 33% larger than original binary data. Our tool handles this process automatically with proper Unicode support.

Data URLs: Embed images directly in HTML/CSS using Base64. Example: data:image/png;base64,iVBORw0KGgoAAAANSUhEUg... CSS: background-image: url('data:image/png;base64,...'). Authentication: Basic Auth uses Base64 for credentials. API: JSON data with binary content often Base64 encoded. Forms: File uploads use multipart/form-data with Base64. These applications reduce HTTP requests and simplify data handling.

Not Encryption: Base64 is encoding, not encryption. Easily reversible by anyone. Data Size: Increases file size by 33%, affects performance. Sensitive Data: Never encode passwords or sensitive information. URL Safety: Standard Base64 uses + and / characters that need URL encoding. Alternative: Base64URL for safe URL encoding. Always use proper encryption for sensitive data, Base64 only for encoding purposes.