Image to Base64
Turn any image into a base64 data URL you can paste straight into HTML, CSS or code.
Developers and designers often need images as base64 data URLs for embedding directly in HTML, CSS or JSON. This free tool converts any JPG, PNG, WebP or GIF into its base64 data URL entirely in your browser. You get a short preview, the full code in a copy-ready box, the file size, and a one-click copy button.
Upload any image to convert it. Base64 output is about 33% larger than the original file.
How to use the Image to Base64
- Upload any image file using the drop zone above.
- The tool instantly converts it to a base64 data URL and shows the file size, code length and size increase.
- Press Copy base64 to copy the full data URL, then paste it into your HTML, CSS or code.
Image to Base64 — FAQs
Is this image to base64 converter free?
Yes, completely free with no signup and no limits. Convert as many images as you like. Everything runs inside your browser using the FileReader API, so there are no queues, no watermarks and no charges.
What is a base64 data URL?
It is your image encoded as a long text string starting with data:image/...;base64,. Because it is plain text, you can paste it directly into an HTML img src, a CSS background, or a JSON payload — no separate image file or link needed.
Why is the base64 output larger than my image?
Base64 encoding represents every 3 bytes of image data as 4 text characters, which adds roughly 33 percent overhead. It is best for small images like icons and logos; large photos are better kept as normal files.
Are my images uploaded to a server?
No. The conversion happens locally in your browser and the encoded text never leaves your device. It is never sent to any server or stored anywhere, so even sensitive images stay completely private and secure.