Image to Data URL

Convert any image into a base64-encoded data URL that can be embedded directly in HTML, CSS, or JavaScript without needing a separate image file. Data URLs include complete image data inline, starting with the familiar "data:image/png;base64," prefix followed by encoded image content. This technique eliminates HTTP requests for small images, improving page load performance.

The conversion reads your image and encodes it as a base64 string with the appropriate MIME type prefix. The tool displays resulting string length and estimates whether inlining is beneficial—generally for images under 10KB where HTTP overhead exceeds the base64 size increase (approximately 33% larger than binary). Copy the complete data URL with one click, or just the base64 portion for APIs expecting raw encoded data. Output format selection (PNG, JPG, WebP) affects both the MIME type and resulting string size—WebP often produces smaller data URLs than PNG for equivalent quality.

Web developers embedding icons in CSS eliminate external file dependencies for critical UI elements. Email template designers include images inline since many email clients block external resources. Single-file HTML document creators embed all assets for portability. JavaScript developers bundling graphics with code avoid runtime asset loading. Anyone needing self-contained documents or code with embedded imagery will find data URL conversion essential. All processing happens locally—sensitive images never leave your browser.