How do I convert an image to a Base64 data URI?

Drop or upload your image into the box. The tool instantly generates the full data URI, including the data:image/png;base64, prefix, in the output box. Press Copy and paste it into your HTML or CSS.

Does the data URI include the prefix I need for HTML and CSS?

Yes. The string starts with the correct data:image/...;base64, prefix, so you can paste it directly into an img src attribute or a CSS url() value without editing anything.

Which image formats can I convert to Base64?

Any standard browser image works, including PNG, JPG, GIF, WebP, and SVG. The output keeps the original format, so transparency and vectors are preserved.

Is it safe to convert private images here?

Yes. The conversion runs locally in your browser with no upload, so your image never leaves your device. Nothing is stored on a server.

Image to Base64 | JotTools

🖼️Drop your image hereor click to browse. Processed in your browser

What the Image to Base64 tool does

This tool turns any image (PNG, JPG, GIF, SVG, WebP) into a Base64 data URI string you can paste straight into HTML, CSS, JSON, or an email template. Instead of linking to a separate .png file, the whole image lives inside the code as text, so there is one less file to host and one less network request to wait for. It is handy for small icons, inline logos, CSS background images, favicons, and quick demos where you do not want to manage asset files. Front-end developers, email coders, and anyone embedding a logo into a static page will get the most out of it.

How to use it

Drag an image onto the drop box, or click it to browse and pick a file from your device.
The tool reads the file and shows its dimensions and size, then generates the data URI automatically. There are no extra settings to fiddle with.
Read the result in the “Base64 data URI” box. The string already includes the data:image/...;base64, prefix, so it is ready to use.
Hit Copy to grab the full string, then paste it into your <img src="">, CSS url(), or wherever you need it.

Why convert here

Conversion happens entirely in your browser using the built in FileReader, so your image never gets uploaded anywhere. That keeps private graphics private and makes the result appear the instant the file loads. It is free, needs no account, and works the same on a phone, tablet, or laptop. Because the output keeps the original image format, a transparent PNG stays transparent and an SVG stays an SVG.

Tips

Base64 strings run roughly 33 percent larger than the original file, so it is best for small images. For big photos, a normal hosted link is usually lighter. Converting a folder of icons at once? The BulkPro desktop app from the same team handles batch jobs.

Frequently asked questions

How do I convert an image to a Base64 data URI?: Drop or upload your image into the box. The tool instantly generates the full data URI, including the data:image/png;base64, prefix, in the output box. Press Copy and paste it into your HTML or CSS.
Does the data URI include the prefix I need for HTML and CSS?: Yes. The string starts with the correct data:image/...;base64, prefix, so you can paste it directly into an img src attribute or a CSS url() value without editing anything.
Which image formats can I convert to Base64?: Any standard browser image works, including PNG, JPG, GIF, WebP, and SVG. The output keeps the original format, so transparency and vectors are preserved.
Is it safe to convert private images here?: Yes. The conversion runs locally in your browser with no upload, so your image never leaves your device. Nothing is stored on a server.

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Last updated: June 15, 2026