Image to Base64

Convert images to Base64 instantly. 100% client-side — no uploads.

Drop an image here

PNG, JPG, GIF, SVG, WebP · click to browse

Output Format

Output

Upload an image to see Base64 output

About the Image to Base64 Converter

This tool converts an image to Base64 and produces a complete data URI, ready to paste into CSS or an img tag. Embedding a small icon this way removes an HTTP request, and the file never leaves your browser.

Converting an image to Base64 lets it be embedded directly in code rather than fetched separately. The result is a data URI — the MIME type followed by the encoded bytes — which a browser treats exactly like an image file.

The reason to do it is one fewer request. For a tiny icon, spinner or background pattern, the round trip often costs more than the bytes, so inlining is faster. It also guarantees the image can never 404 or load late, which matters for a critical inline asset.

The limit is size. Base64 adds about 33% overhead, embedded images cannot be cached separately from the file containing them, and a large inlined image blocks the stylesheet or HTML it sits in. Under a few kilobytes is the sensible range; beyond that a normal image reference wins.

How to use the Image to Base64 Converter

  1. Select your image. Choose a small PNG, JPG, SVG or GIF.
  2. Convert it. The Base64 string and full data URI are produced.
  3. Check the size. Confirm the result is small enough to be worth inlining.
  4. Copy the data URI. Paste it into your CSS background or img src.

Image to Base64 Converter features

  • Complete data URI, ready to paste
  • Base64-only output when you need just the payload
  • A ready-made CSS background snippet
  • Drag and drop, or choose a file
  • Shows the resulting size
  • The image is read in your browser and never uploaded

Frequently asked questions

What is a data URI?

The image encoded directly into the URL, so the markup or stylesheet carries the file itself. The browser needs no separate request to display it.

When is embedding worth it?

For small assets on the critical path — an icon, a tiny logo, a 1-pixel gradient. Below roughly 2 to 4 KB, removing the request usually beats the size penalty.

When is it a bad idea?

For anything large. Base64 adds about a third to the size, an embedded image cannot be cached separately from the file containing it, and it bloats the HTML or CSS that has to arrive before the page renders.

Which formats can I encode?

Any image your browser can read — PNG, JPEG, WebP, GIF and SVG. For SVG specifically, consider inlining the markup instead: it stays smaller than Base64 and remains styleable with CSS.

Is my image uploaded?

No. Encoding happens in your browser, so the file never leaves your machine.