Convert an Image to Base64

Turn an image into a Base64 data URI for CSS, HTML or JSON.

Image to Base64 Converter

100% Private processing — your photos never leave your device

Click to upload or drag and drop imageSupports JPG, PNG, WebP, GIF, BMP

Ad Space (auto) — Configurable via NEXT_PUBLIC_ADSENSE_CLIENT

What does Image to Base64 Converter do?

Convert an image into a Base64 data URI you can paste directly into CSS, HTML, JSON or an email template. The output is available as a raw string, a CSS background rule and a ready-made img tag.

How to Use Image to Base64 Converter

1
Select an imageAny format your browser can read.
2
Pick an output formatRaw string, data URI, CSS or HTML.
3
Copy the resultPaste it straight into your stylesheet or markup.

Key Features

Raw Base64, full data URI, CSS background rule and HTML img tag
Correct MIME type detected from the file automatically
Encoded size shown so you can judge whether inlining is worth it
Warns when the result is large enough to hurt page performance
One-tap copy for each output format

Frequently Asked Questions

What is a data URI?

A way of embedding a file directly in a document instead of linking to it. The format is data:[mime-type];base64,[data] — the browser decodes it in place, so no separate request is made.

When should I inline an image as Base64?

For very small assets — icons under about 2 KB, or a single critical above-the-fold graphic. Inlining removes a network round trip but the data cannot be cached separately and is 33% larger than the binary.

Why is the Base64 string bigger than the file?

Base64 encodes three bytes as four ASCII characters, so the output is always about 33% larger. Gzip recovers some of that in transit, but the decoded size in your CSS file stays inflated.

Can I use this in an email template?

Sometimes. Data URIs work in Apple Mail and most web clients but are blocked by Outlook and Gmail on the desktop. Host the image and link to it if broad email support matters.

100% Data Privacy

Your image is read straight from your device by the browser and processed on a canvas in this page. It is never uploaded, stored or sent anywhere — you can disconnect from the internet after the page loads and the tool still works.