Developers often embed small images directly into HTML or CSS as Base64 data URIs to save an extra network request. This tool turns any image into a ready-to-paste Base64 string.
Encoding runs entirely in your browser, so your image is never uploaded. Free, private and instant.
How to use the Image to Base64 Converter
- Select an image or drop it in.
- The Base64 string is generated instantly.
- Copy the output and paste it into your code.
What Base64 image encoding is for
Base64 turns an image file into a block of text, which lets you embed the image directly inside HTML, CSS, JSON or an email template instead of linking to a separate file. The embedded form is called a data URI and looks like data:image/png;base64 followed by the encoded text. The browser decodes and displays it exactly like a normal image.
When to embed and when not to
Base64 text is about 33 percent larger than the original file and cannot be cached separately by the browser, so it suits small images: icons, logos, tiny backgrounds and email signatures, typically under 10 KB. Large photos should stay as normal image files. Embedding shines when you need a single self-contained file, when an extra HTTP request is expensive, or when a platform does not allow file uploads but accepts code.
Common uses
- Inlining small icons and logos in CSS and HTML
- Embedding images in HTML emails and signatures
- Storing small images inside JSON APIs and config files
- Testing and prototyping without hosting image files
Frequently asked questions
Is the Base64 encoder free?
Yes, free with no signup.
Is my image uploaded?
No. Encoding happens locally in your browser.
What can I use a Base64 image for?
You can embed it directly in HTML img tags or CSS backgrounds to avoid an extra file request.
Does it work with PNG and JPG?
Yes, it works with PNG, JPG, WebP and other common image formats.