01
Small PNG icon
Upload a 32×32 PNG icon that's 236 bytes, and the data URI comes out as data:image/png;base64,iVBORw0KG... at 338 characters — base64 makes the data about a third bigger.
Image to Base64 Converter
Image ToolsConvert images to Base64 data URIs for HTML and CSS, or decode Base64 to image — free.
Image file
About
About the Image to Base64 Converter
Converts an image file into a Base64 data URI you can paste into HTML or CSS, or decodes one back into a preview.
Developers use it to inline small icons or logos directly into HTML or CSS without an extra network request, while anyone debugging a data URI can paste it back in to check what image it actually decodes to. It's one of many free image tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.
Examples
Image to Base64 Converter examples
3 worked examples
02
JPEG photo
Upload an 800×600 JPEG that's 103 KB, and the data URI comes out as data:image/jpeg;base64,/9j/... at 141,043 characters, about 138 KB of text.
03
Decoding back to a preview
Paste a data:image/jpeg;base64,... string into the lower box and click Preview to render the 800×600 image it represents — right-click the preview to save it as a file.
Related tools
FAQ
Frequently asked questions
Quick answers to common questions about the Image to Base64 Converter.
What does the Image to Base64 Converter do?
It converts an image file into a Base64-encoded data URI you can paste directly into HTML or CSS, and can also decode a data URI back into a preview image.
Is the Image to Base64 Converter free to use?
Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.
Is my image safe when I use this tool?
Yes. The image you upload, and any data URI you paste in, are processed entirely on your own device using your browser's built-in FileReader API — nothing is sent to a server.
Why would I use a data URI instead of a normal image file?
A data URI embeds the image's bytes directly in your HTML or CSS, so the browser doesn't need a separate request to load it — handy for very small icons or fully self-contained email templates, though it makes the surrounding file larger.
Does converting to Base64 lose any image quality?
No. Base64 encoding is lossless — it just re-represents the exact same bytes as text. The image itself is identical before and after.
Can I convert a data URI back into a downloadable image file?
Paste it into the lower box and click Preview to see the image — right-click (or long-press on mobile) the preview to save it as a file.
Can I use the Image to Base64 Converter on my phone?
Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.
Does the Image to Base64 Converter have any limitations?
Very large images produce a very long data URI, which is normal — Base64 encoding makes text about a third larger than the original binary file.