Image to Base64 Converter
Convert any image to Base64 online — get raw Base64, data URI, CSS background and HTML img snippets with one-click copy. Private, in-browser conversion.
About the Image to Base64 Converter
The Image to Base64 Converter encodes any image — PNG, JPG, GIF, WebP or SVG — into Base64 text right in your browser. Drop the file in and switch between four ready-to-use outputs: raw Base64, a complete data URI, a CSS background-image rule, and an HTML img tag.
Base64-embedded images save an HTTP request, which is why they're used for small icons, email signatures, and single-file HTML documents. The tool warns you when a file exceeds 100 KB, because past that point inlining usually hurts performance more than it helps — Base64 is about 33% larger than the original binary.
Your image never leaves your device: the conversion runs locally with the FileReader API, so it's safe for logos, screenshots and anything confidential.
How to Use the Image to Base64 Converter
- 1Drop an image onto the upload area or click to choose one.
- 2Pick the output you need: raw Base64, data URI, CSS or HTML.
- 3Click Copy and paste the snippet straight into your code.
Frequently Asked Questions
How do I use a Base64 image in CSS?
Use the CSS background tab — it generates background-image: url("data:image/png;base64,…"); which you paste into any selector. No separate image file or HTTP request needed.
How do I embed a Base64 image in HTML?
Use the HTML tab: it outputs an <img> tag with the data URI as src. Browsers render it exactly like a normal image, and it works in offline single-file pages and most email clients.
Why is the Base64 output larger than my image file?
Base64 encodes 3 bytes of binary as 4 text characters, so output is about 33% bigger. That's the trade-off for being able to embed the image directly in text.
When should I NOT use Base64 images?
For anything big. Past ~100 KB, inlining bloats your HTML/CSS, blocks rendering and can't be cached separately. Serve large photos as normal files and reserve Base64 for icons and tiny assets.