Image to Base64
Convert images to Base64 data URIs locally — embed images in HTML, CSS, or API payloads.
Images never leave your browser.
What this tool does
Base64 data URIs embed small images directly in HTML or CSS — no separate file request.
Best for tiny icons and email templates; avoid for large photos that bloat page weight.
How to use it
- 1
Upload your image file (processed locally in browser).
- 2
Copy the generated Base64 string or data URI.
- 3
Paste into HTML img src, CSS background, or your development workflow.
When to use Base64
Email clients that block external images may render inline Base64. Dev prototypes benefit from single-file HTML.
Large Base64 strings hurt Core Web Vitals — use CDN URLs for hero images.
Tips
- Compress images before encoding to Base64.
- Never commit multi-megabyte Base64 strings to git repos.
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Frequently asked questions
Is Base64 conversion done on a server?▼
No. Encoding runs entirely in your browser — images are never uploaded.
When should I use Base64 images?▼
Best for small icons and inline assets — large images bloat HTML and slow page loads.