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)
Like this tool? Try Sequenzy for free
AI-powered email marketing with Stripe integration, automations, and built-in analytics.
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 word counter, and optimize your text-to-image ratio to maintain good deliverability.
Frequently Asked Questions
More Free Tools
View all toolsGDPR Email Compliance Checker
Audit your email marketing practices against GDPR requirements with this interactive checklist. Check consent collection, subscriber rights, data processing, and more.
Email Closing Generator
Browse 35+ professional email closing sentences organized by tone — professional, friendly, casual, urgent, grateful, and encouraging. Includes copy-paste closings, formulas by email type, and tips for crafting the perfect ending.
Free Unit Cost Calculator
Calculate the cost per unit for any product or service. Includes fixed/variable cost breakdown, volume scaling analysis, break-even projections, and multi-scenario comparison.
Email Responsive Preview
Preview your email HTML at different screen sizes to see how it renders on mobile, tablet, and desktop. Compare side by side at 320px, 375px, 480px, 600px, and 768px widths.