Image to Base64 Converter
Pick or drag an image to get its Base64 data-URI for embedding in CSS or HTML, or paste a data URI to preview it as an image. Everything runs in your browser — your image is never uploaded and nothing is stored.
Image → Base64
or drag & drop here
PNG, JPG, GIF, SVG, WebP — read locally, never uploaded.
Base64 → Image
How to use the image to Base64 converter
- Click Choose image or drag a file onto the drop zone.
- Copy the generated
data:image/…;base64,…string and paste it into your CSSurl()or an HTML<img src>. - To go the other way, paste a data URI into the reverse box and click Preview image.
Use Base64 data URIs for small icons and backgrounds to save a request; remember the encoded string is about 33% larger than the original file.
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Frequently asked questions
What is a data URI?
A data URI embeds a file directly inside a URL using the form data:image/png;base64,…. Instead of pointing to a separate image file, the image bytes are Base64-encoded and carried inline, so the image travels with your CSS or HTML and needs no extra request.
When should I embed an image as Base64?
Base64 embedding works best for small, frequently reused assets such as icons, tiny logos, sprites or background textures. Inlining them removes an HTTP request, which can speed up the first render. For large photos it is usually better to keep a normal image file.
Is my image uploaded anywhere?
No. The file is read entirely in your browser with the FileReader API — it is never uploaded to a server and nothing is stored. You can use it safely for private or confidential images.
What is the downside of Base64 images?
Base64 encoding makes the data roughly 33% larger than the original binary file, and inlined images are not cached separately by the browser. For big or repeated images across many pages, a normal image file is usually the better choice.