Image to Base64 Converter
Convert images to Base64 data URIs for embedding in code and CSS
Choose an image file
or drag and drop it here
• Embedding images directly in HTML/CSS
• Creating self-contained email templates
• Reducing HTTP requests for small images
• Creating offline-capable web applications
• Storing images in databases as text
• Use for small images (< 10KB) to avoid bloat
• Consider compression before conversion
• Use WebP format for better compression
• Cache Base64 strings to avoid re-encoding
• Test loading performance with large images
Embedding images as Base64 reduces HTTP requests and simplifies deployment. Our converter transforms images into data URIs instantly, perfect for inline SVG icons, email templates, and single-file HTML pages where external image hosting isn't practical or desired.
📁 Multiple formats - JPEG, PNG, GIF, WebP, SVG support
⚡ Instant encoding - Convert images in milliseconds
👁️ Preview support - See original image before encoding
📋 Data URI output - Complete data URI for direct HTML/CSS use
🔒 Privacy-focused - All conversion happens in browser
📏 Size display - Shows original and encoded sizes
Size Limitations
Base64 encoding increases file size by 33%. Keep images under 10KB for inline embedding. Larger images harm page load performance and negate HTTP request savings. Use external hosting for photos.
Perfect for Icons
Embed small icons, logos, and UI elements as Base64 in CSS. This eliminates separate HTTP requests for tiny images, improving initial page load. Ideal for loading spinners and critical UI elements.
Email Templates
Use Base64 images in HTML emails to ensure images display reliably. External images often get blocked by email clients. Base64 embedding guarantees images appear but increases email size—balance wisely.
CSS Background Images
Embed Base64 images in CSS: background-image: url(data:image/png;base64,...). This is perfect for gradients, patterns, and small decorative images that shouldn't trigger separate requests.
Caching Considerations
Base64 images embedded in HTML/CSS can't be cached separately. External images cache better. Use Base64 for critical above-the-fold content, external URLs for below-the-fold images that benefit from caching.
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