Image to Base64 & Data URI Converter

Convert images to Base64 Data URI strings, HTML img tags, and CSS background-image rules, or decode Base64 strings back into PNG/JPG images 100% locally.

• Dual-mode studio: Image → Base64 Encoder and Base64 → Image Decoder in one workspace
• Generates ready-to-copy Data URI, raw Base64 payload, HTML <img> tag, and CSS background-image snippet
• Live Base64 string decoder with automatic MIME header detection, dimension readout, and PNG download
• 100% client-side FileReader and Canvas execution with zero server uploads

Frequently Asked Questions

Can I paste a raw Base64 string without the data:image/png;base64, prefix?

Yes. The decoder inspects the magic byte prefix (/9j/ for JPEG, iVBOR for PNG, UklGR for WebP, R0lGOD for GIF) and reconstructs the Data URI automatically.

When should I use Base64 Data URIs instead of external image files?

Use Base64 Data URIs for small icons, logos under 15 KB, HTML email templates, or self-contained single-file web documents where eliminating extra HTTP requests is beneficial.