Image to Base64 Converter Online Free
Turn any image into a Base64 string for embedding in HTML, CSS or email.
or drag & drop your image here
Your image is converted to a Base64 data-URL instantly. Copy it and use it in HTML, CSS or wherever you need an embedded image.
Why convert an image to Base64?
Base64 encodes any image as plain text that can be embedded directly in HTML, CSS or JSON — no separate file and no extra HTTP request. This free tool converts your image to a Base64 data-URL instantly and copies it to your clipboard.
It is ideal for small images in email signatures, inline icons, prototypes and database fields. Note that Base64 adds about 33% to the file size, so for large images a separate file is usually better.
Encoding happens locally in your browser, so your image never leaves your device. Try JPG to PNG or PNG to JPG.
How to convert an image to Base64
Upload your image
Click "Choose Image" or drag and drop your file. It is encoded entirely on your device.
Copy the Base64 string
The data-URL appears instantly in the text box. Click Copy to put it on your clipboard.
Use it anywhere
Paste it into HTML, CSS or JSON as an embedded image.
Why choose this Base64 converter?
Data-URL output
Get a ready-to-paste data:image string for HTML, CSS or JSON.
One-click copy
Copy the Base64 string straight to your clipboard.
Private by Design
Images never leave your device — processed 100% in your browser.
100% Free
No signup, no watermarks, no limits. Use it as much as you need.
Frequently Asked Questions
Is Base64 the same as an image URL?
No. A URL points to a file the browser downloads separately. A Base64 data-URL contains the entire image as text, so no extra request is needed — at the cost of about 33% more file size.
What is Base64?
Base64 is a way to encode binary data (like an image) as plain text using only letters, numbers and a few symbols. The result can be embedded directly into HTML, CSS or JSON.
How do I use the Base64 output?
Copy the string and use it as the src of an tag:
<img src="data:image/jpeg;base64,....">, or in CSS as a background image. It works anywhere a data URL works.
Why should I convert an image to Base64?
Embedding images as Base64 removes extra HTTP requests, which can speed up small pages and email signatures. It also lets you store an image inside a single text file or database field.
Does Base64 make the file bigger?
Yes — Base64 adds about 33% to the file size. For large images it is usually better to keep them as separate files.
Is my image uploaded?
No. Encoding happens entirely in your browser. Your image never leaves your device.