Base64 Encoder & Decoder
Professional Base64 encoder and decoder for developers. Convert text, images, and files to Base64 strings with preview, batch processing, and URL-safe encoding support.
Base64 Tools
Choose your operation and input type
Text Processing
Key Features
Understanding Base64
Tips & Strategies
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data as ASCII strings using 64 characters. It's commonly used for transmitting data over text-based protocols.
What's the difference between standard and URL-safe Base64?
URL-safe Base64 replaces '+' with '-', '/' with '_', and removes padding '=' characters. This makes the encoded string safe to use in URLs and filenames without conflicts.
Is my data safe when using this tool?
Yes, absolutely. All encoding and decoding happens entirely in your browser using JavaScript. Your files and data never leave your device or get sent to any server.
Can I encode large files?
Yes, but performance depends on your browser and device memory. Very large files (>50MB) may slow down the browser. Consider breaking large files into smaller chunks if needed.
Why does Base64 make files larger?
Base64 encoding increases file size by approximately 33% because it uses 4 characters to represent every 3 bytes of original data. This is the trade-off for text-safe representation.
What file types can I encode?
You can encode any file type - images, documents, videos, executables, etc. The tool reads files as binary data and converts them to Base64 regardless of format.
How do I use Base64 in web development?
Common uses include data URLs for embedding images in CSS/HTML, storing binary data in JSON, and creating HTTP Basic Auth headers. Use the format: data:image/png;base64,[encoded-data]
Can I decode corrupted Base64 strings?
The tool will show an error for invalid Base64 strings. Common issues include missing padding, invalid characters, or incorrect length. Ensure the string contains only valid Base64 characters.