Image to Base64 — Free Data URI
Convert an image to a Base64 data URI for HTML/CSS. 100% in your browser — free, no sign-up.
- ✓Free
- ✓No sign-up
- ✓Runs in your browser — files never uploaded
- ✓No watermark
How to
- 1Choose an image — it is encoded in your browser and never uploaded.
- 2Copy the Base64 data URI, or the ready-made CSS snippet.
- 3Paste it into your HTML or CSS.
What is a Base64 data URI?
A data URI encodes an image as a long Base64 text string that can be placed directly inside HTML or CSS instead of linking to a separate file. The browser decodes it back into the image — so the picture travels inside your code with no extra request.
How it works here
Your image is read and Base64-encoded entirely in your browser, then given to you as a ready-to-paste data URI or a CSS background snippet. Nothing is uploaded, so even private images stay on your device.
When to use a data URI
Inline a small icon or logo to save an HTTP request, embed an image in a single self-contained HTML email or file, or include a graphic where you cannot host a separate image. It is most useful for small images.
When not to use it
Base64 makes data about 33% larger and cannot be cached separately by the browser, so it is a poor fit for large images or pictures reused across many pages. For those, a normal image file is faster.
FAQ
Is my image uploaded?+
No. The image is read and encoded in your browser, so it never leaves your device.
What do I get back?+
A ready-to-paste Base64 data URI, plus a CSS background snippet, that you can drop straight into HTML or CSS.
Should I inline large images?+
Usually no. Base64 makes data about 33% larger and cannot be cached separately, so it is best for small icons and logos, not big photos.
Why use a data URI at all?+
It embeds an image directly in your code, saving an HTTP request and keeping everything in one self-contained file or email.
Is it free?+
Yes, completely free — no sign-up and no watermark.
Is my data private?+
Yes — this tool runs entirely in your browser. Your files and text are never uploaded.
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