Image to Base64 converts a picture into Base64 text that you can paste straight into HTML, CSS, JSON or emails. Choose a data URI, plain Base64, a CSS rule or an HTML tag and copy it with one click.
How to convert an image to Base64
- Click "Choose image" or drag and drop a picture into the box.
- Choose the output: Data URI, Base64 only, CSS or HTML.
- Click "Copy to clipboard", or "Download .txt" for long results.
- Paste the code into your web page, stylesheet or app.
Why use ZentaPDF Image to Base64?
Frequently asked questions
Are my files uploaded to a server?
No. ZentaPDF processes your files inside your own browser using JavaScript. Nothing is uploaded, so nobody else can see your documents — not even us.
What is a data URI?
A data URI puts the whole image inside a text link that starts with "data:image/…;base64,". Browsers can show it directly, without loading a separate image file.
When should I use Base64 images?
For small images such as icons, logos and email signatures. Base64 is about 33% larger than the original file, so large photos are better kept as normal files.
Which image formats are supported?
JPG, PNG, WebP, GIF, SVG, AVIF and any other image type your browser can open.
Is it really free? Do you add a watermark?
Yes, it is completely free with no sign-up, no watermark and no daily limits. The site is supported by a few non-intrusive ads.