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Base64 Encoder & Decoder
Encode and decode text, strings, and files to Base64 format with full UTF-8 Unicode support. 100% private in-browser tool.
Operation:
Raw Text Input0 chars
Base64 Output0 chars
Understanding Base64 Encoding & Data URIs
🔤 UTF-8 Safe Conversion
Standard JavaScript `btoa` fails on special characters and non-Latin scripts. Our converter properly serializes UTF-8 bytes to guarantee clean conversions for international text and emojis.
🖼️ Inline Image Data URIs
Embed small PNG, SVG, and JPEG icons directly inside HTML (<img src="data:...">) or CSS stylesheets to eliminate HTTP roundtrips for faster Core Web Vitals.
⚡ Zero Server Overhead
All file conversions happen entirely in your browser using the HTML5 FileReader API. Your sensitive documents and keys are never uploaded or logged.