Image Base64 Encoder
Image Base64 Encoder is a free online tool that converts images to Base64 strings and decodes Base64 back into image previews. It accepts images via click-to-upload, drag-and-drop, or direct paste, and the generated code can be copied with one click.
Images are read and encoded locally in your browser — nothing is uploaded, so screenshots and design assets stay private. Free with no sign-up, it's handy for inlining small icons into CSS/HTML, building email templates, or debugging Base64 image data in APIs.
How to Use
- Upload, drag in, or simply paste (Ctrl+V) an image
- The Base64 string with its data:image prefix is generated automatically
- Click copy to grab the encoded string
- Going the other way, paste a Base64 string into the textarea to preview the decoded image
FAQ
Is the Image Base64 Encoder free?
Yes, completely free with no usage limits and no account required.
Are my images uploaded to a server?
No. Images are read and encoded entirely in your browser, so private pictures never leave your device.
Can it decode Base64 back into an image?
Yes. Paste a Base64 string into the textarea and the tool decodes it into a live image preview — it even tries to auto-detect and add a missing data:image prefix.
When should I use Base64 images?
They're best for small icons and images inlined into CSS, HTML, or email templates, saving an HTTP request. Avoid Base64 for large images, since encoding grows the size by roughly a third.