JPG to Base64 Converter Online - Free, No Upload

Pick a JPG and get its Base64 string back, along with a ready img tag and a CSS background rule. JPEG files work the same way, it is the same format.

Your browser does the encoding, so the photo is never uploaded. No signup, no size cap, free.

How to Convert a JPG to Base64

1. Click Select JPG and choose your photo.
2. The preview and code blocks appear underneath.
3. Copy whichever block you need, or save it as a text file.

The string starts with data:image/jpeg;base64, whether your file ended in .jpg or .jpeg. Both spellings are the same format.

Photos Are the Hardest Case for Inlining

A JPEG photo is usually 200 KB to 5 MB. Encoding adds about 33% on top of that. A 500 KB photo becomes roughly 665 KB of text sitting inside your HTML or CSS.

Worse, that text cannot be cached on its own. Every page load carries it again, and the browser has to read past all of it before the stylesheet finishes.

So the honest answer is that most photos should stay as normal files with a normal URL.

When JPG to Base64 Is Still the Right Call

There are a few real cases where inlining a photo makes sense.

1. Email signatures - many mail clients block linked images but render data URIs fine.
2. Single-file HTML - a report or invoice that must travel as one file with no folder.
3. Small thumbnails - a 3 KB avatar or preview tile, where the request costs more than the bytes.
4. API payloads - sending a photo inside a JSON body, which cannot hold raw bytes.

If your case is not on that list, link the file instead.

Your Photo Never Leaves the Browser

Most converters send your picture to a server to do the encoding. This page does not. The file is read on your own machine and the string is printed on the same page.

That matters for personal photos, ID scans, and client work. No upload means there is no copy of your photo anywhere but your device.

Other Formats and the Way Back

For flat graphics, PNG to Base64 is the better fit, and image to Base64 takes WebP, GIF and SVG too.

Got a string and need the picture? Base64 to image previews it and hands you a download.