When should I inline an image as Base64?

For very small images (icons, logos under ~2KB) where an extra HTTP request hurts more than the ~33% size inflation Base64 causes. For larger images, keep them as separate files.

Does Base64 encoding reduce quality?

No. Base64 is lossless encoding. The resulting file is about 33% larger than the original binary.

How do I use the output in HTML?

Paste into the src attribute of an tag:

Image to Base64

Image Tools· 9 tools

Free online image-to-Base64 encoder. Upload an image and get a Base64 data URL you can paste directly into an <img> tag, CSS background, or JSON payload. Runs entirely in your browser.

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Frequently Asked Questions

References

Data URLs — MDN Web Docs
RFC 2397 — The "data" URL scheme — IETF

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Frequently Asked Questions

References and sources

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