Image to Base64
Convert any image to a Base64 data URI, with ready-to-use HTML and CSS snippets — private and free.
Convert an image to Base64
The Image to Base64 encoder turns any image into a Base64 data URI you can embed directly in your code — no separate file needed. Upload an image and copy the raw data URI, a ready-made HTML <img> tag, or a CSS background-image rule. Everything runs in your browser, so your image is never uploaded.
What is a Base64 image?
Base64 encoding represents binary image data as text. A data URI like data:image/png;base64,iVBOR... packs the whole image into a string that browsers render as if it were a file. This lets you embed small images straight into HTML, CSS, or JSON, avoiding a separate network request for that asset.
When to use Base64 images
- Tiny icons and logos embedded in CSS to save HTTP requests.
- Email templates where external images may be blocked.
- Single-file prototypes with no asset folder.
- Inlining an image into JSON or a data export.
How to use it
- Upload your image.
- Copy the data URI, HTML, or CSS snippet.
- Paste it into your project.
The trade-off: size
| Pro | Con |
|---|---|
| No extra HTTP request | ~33% larger than the binary file |
| Self-contained | Can't be cached separately by the browser |
| Works inline in CSS/HTML/JSON | Bloats your HTML/CSS if overused |
Base64 adds about a third to the size, and inlined images can't be cached on their own. So reserve it for small images — icons, tiny logos, simple backgrounds. For larger photos, a normal image file is more efficient.
Private by design
Encoding happens locally in your browser; your image is never uploaded or stored. That makes it safe for private assets, and there's no upload wait — the data URI is ready instantly.
Private and free
The tool is completely free with no sign-up. Encode as many images as you like.
Frequently asked questions
What is a data URI?
A data URI embeds a file directly in a string, like data:image/png;base64,…, so the browser renders it without a separate request.
Should I Base64-encode large images?
No. Base64 adds ~33% size and can't be cached separately. Use it only for small icons, logos, and simple graphics.
Are my images uploaded?
No. Encoding runs entirely in your browser and nothing is uploaded or stored.
Is it free?
Yes, completely free with no sign-up.