Image & File to Base64
Convert images or any other file types into Base64 encoded strings locally. Ideal for embedding assets directly in HTML, CSS, or JSON.
Drag & drop any file here, or click to browse
File limit: 10MB. Encodings occur entirely on your device.
Max file size: 10MB
Base64 Encodings
Upload a file to generate data URLs, raw Base64, and embed codes.
How to Convert Images to Base64 and Data URIs Online for Free
Want to inline images directly into HTML or CSS to eliminate HTTP requests and eliminate flickering? BrowserPowerToys converts images (PNG, JPEG, WebP, SVG, GIF, ICO) into Base64-encoded Data URIs instantly. Everything runs 100% client-side with zero file uploads.
Drop Your Image
Drag and drop any image file (up to 10MB) or click the upload area to browse from your device.
Instant In-Browser Encoding
Your browser reads the binary stream via FileReader and encodes it into Base64 format locally.
Select Embed Format
Switch between Data URL, raw Base64 string, <img src="..."> tag, or background-image: url(...) CSS snippet.
Copy Snippet
Click "Copy" on any snippet to paste the self-contained image code straight into your templates or styles.
Why Choose BrowserPowerToys Image to Base64 Converter?
- Zero Cloud Data Exposure: Your graphic assets, icons, brand mockups, and confidential photos are never sent across the network.
- Ready-to-Use Web Snippets: Generates fully formed HTML image tags and CSS background declarations with correct MIME types.
- Universal Graphic Format Support: Seamlessly encodes SVG vector files, PNG transparencies, WebP, JPG, and Favicon ICO formats.
- Overhead & Size Inspection: Displays exact file size before and after encoding so you can balance HTTP reduction against asset payload.
Frequently Asked Questions
Everything you need to know about processing files securely in your browser
What is Base64 encoding and why use it?
Base64 converts binary data (like images or files) into an ASCII string representation. This allows you to embed files directly inside HTML, CSS, or JSON documents, reducing the number of HTTP requests a web page has to make.
How does this offline Base64 converter work?
It reads your file locally using the `FileReader` API and converts it to a base-64 encoded string format on your device.
Is my file uploaded to a server for encoding?
No. All encoding is performed client-side on your device. Files never leave your web browser, ensuring total privacy.
Does Base64 make the file size larger?
Yes, Base64 encoding adds about 33% overhead to the file size compared to the raw binary file. Therefore, it is best used for small icons, fonts, and scripts, rather than large images or videos.