JPG to Base64 Converter
Drag in a JPG / JPEG photo and instantly get its Base64 string and data URI — ready to paste into HTML, CSS, JSON or JavaScript. One click to copy.
100% client-side. Your photo never leaves your device.
Drop a JPG here
or paste from clipboard · JPG and JPEG both work
JPG to Base64, explained
Encoding a JPG to Base64 turns the photo's binary data into a plain-text string you can embed directly in your code. JPEG is a compressed, lossy format built for photographs, so its Base64 strings are far shorter than an equivalent uncompressed image — handy when you want a small inline thumbnail.
How to use it
<img src="data:image/jpeg;base64,/9j/4AAQSkZJRg..." alt="photo" />
.banner { background-image: url(data:image/jpeg;base64,/9j/4AAQSkZJRg...); }Keep an eye on size
Base64 inflates data by about 33%, and an inlined photo can't be cached on its own. For a
large hero image, a normal .jpg file the browser can cache will load faster. Reserve Base64 for
small thumbnails, avatars, or single-file deliverables like emails and self-contained HTML reports.
Private by design
The conversion runs locally with your browser's FileReader API — no upload, no server. Check
your Network tab and you'll see the photo never goes anywhere.
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Frequently asked questions
What does a JPG Base64 string start with?
A JPEG data URI starts with data:image/jpeg;base64, and the body typically begins with /9j/ — the Base64 signature of the JPEG header.
Should I inline a large JPG as Base64?
Usually not. Base64 adds about 33% to the size and inlined images can't be cached separately. For large photos keep a normal .jpg; reserve Base64 for small images or single-file deliverables.
Is the conversion private?
Yes. Everything runs in your browser with the FileReader API. The JPEG is never uploaded to any server.