How to use the Image to Base64
- Upload an image
- Copy the Base64 string, HTML or CSS snippet
- Or paste Base64 to decode it into an image
About this tool
Convert images to Base64 data URIs for HTML and CSS, or decode a Base64 string back into an image. Image to Base64 is part of ToolNest's collection of free image tools. All processing happens locally in your browser, so your files stay private and nothing is uploaded.
Frequently asked questions
Is the Image to Base64 free to use?
Yes. Image to Base64 on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
Are my files uploaded to a server?
No. Image to Base64 processes your files directly in your web browser on your own device. Your files are never uploaded, stored or seen by anyone, which makes it safe for private and confidential documents.
Is there a file size limit?
There is no fixed limit, but very large files depend on your device's memory and speed. Files up to a few hundred MB usually work well on a modern computer.
Does Image to Base64 work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.