Convert image files into Base64 encoded strings (Data URLs) for direct embedding into CSS, HTML, and JSON, or decode raw Base64 back into downloadable image files.
All formatting, parsing, decoding, and validation executes entirely within your browser using modern Web APIs and JavaScript. Your tokens, JSON payloads, regex inputs, and queries never leave your computer.
Embedding small graphic assets—such as icons, UI logos, and avatar placeholders—directly into HTML or CSS using Data URIs eliminates external HTTP requests, reduces latency, and guarantees self-contained assets in emails and offline web apps.
DevRef's Image to Base64 Converter handles bidirectional encoding and decoding. Drag and drop any PNG, JPG, WebP, or SVG file to receive a standards-compliant data:image/...;base64,... string, or paste a Base64 string to render and download the original graphic. All conversions use browser FileReader APIs with zero server transmissions.
Base64 represents 3 binary bytes as 4 ASCII characters, introducing a consistent ~33% size overhead compared to binary files. It is best used for small icons (<10KB) where eliminating HTTP connection overhead outweighs the slight payload increase.
Use the syntax: background-image: url('data:image/png;base64,iVBORw0KGgo...'); which embeds the icon directly into your stylesheet.
No. The FileReader and Canvas APIs execute entirely within your client's web browser. No data is sent over the network.