Encode and decode Base64 strings with our secure online tool.
Base64 Encoder/Decoder
Encode and decode Base64 strings, images, and files with support for multiple formats
Operation
Input Type
Input
Base64 Encoder/Decoder Features
Text Encoding
Encode and decode plain text strings with multiple character set support.
Image Conversion
Convert images to Base64 data URIs and back with live preview.
URL Conversion
Convert images from URLs directly to Base64 data URIs.
Multiple Formats
Output in plain Base64, data URI, or JSON format with line breaks.
Privacy First
All processing happens in your browser. Your data never leaves your device.
Base64 Reference
Character Set
Common Uses
Data URI Format
data:[mediatype][;base64],<data>
How to use Base64 Encoder/Decoder
Choose operation
Select whether you want to encode or decode your data.
Select input type
Choose text, file upload, or URL for your input data.
Process & copy
Click process and copy the Base64 result or download as file.
Example Outputs
Text Encoding
Hello World!
SGVsbG8gV29ybGQh
Data URI
1x1 red pixel PNG
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==
JSON Format
{"name": "test"}
{"data": "eyJuYW1lIjogInRlc3QifQ==", "type": "application/json"}
Base64 encoding is a fundamental data transformation technique used extensively in web development, email systems, and data transmission protocols. Our comprehensive Base64 encoder/decoder tool provides developers, system administrators, and data analysts with reliable methods to convert binary data into ASCII text format and vice versa. Whether you're embedding images in HTML/CSS, transmitting binary data through text-based protocols, or handling file uploads in web applications, this tool ensures proper data encoding and decoding with industry-standard Base64 algorithms. The encoder supports text strings, URLs, and various data formats, making it perfect for API development, data storage, and cross-platform data exchange. All processing happens client-side using native browser APIs, guaranteeing your sensitive data never leaves your device and ensuring complete privacy during encoding operations. Essential for web developers working with file uploads, data URIs, and binary-to-text conversions.