Base64 Image Encoder for Email
Convert images to base64-encoded data URIs for embedding directly in email HTML. Upload an image and get ready-to-use HTML, CSS, and raw base64 output.
Drag and drop an image here, or click to browse
Supports PNG, JPG, GIF, SVG, and WebP (max 5MB)
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About this tool
Base64 encoding lets you embed images directly in your email HTML without hosting them on a server. This can be useful for logos, icons, and small graphics that need to display immediately without external requests. However, base64 increases email size by roughly 33%, so use it sparingly and only for small images. For larger images, host them on a server and reference them with regular img tags. Check your total email size with our email size checker, and optimize your text-to-image ratio to maintain good deliverability.
Frequently Asked Questions
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