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🖼️ Image to Base64 Converter

Convert any image to a Base64 data URI instantly — then copy it as raw Base64, a CSS background-image rule, or an HTML img tag, all without uploading your file.

Load image
🖼️
Drop an image here, or click to browse
Converted in your browser — no upload

About

This tool reads your image file using the browser's FileReader API and encodes it as a Base64 string entirely on your device. You can copy the result in three ready-to-use formats: the raw data URI (usable anywhere a URL is accepted), a CSS snippet for background-image, or a complete HTML img element. The panel also shows the original file size alongside the encoded size so you can judge the trade-off. Because encoding runs locally, your image never leaves your browser — making it safe for sensitive graphics like logos or private photos.

How to use

  1. Drop your image onto the upload area or click to select a file from your device.
  2. The tool encodes the image in your browser instantly and displays the original and encoded file sizes.
  3. Choose your copy format: Raw Base64 data URI, CSS background-image rule, or HTML img tag.
  4. Click the Copy button to copy the encoded string to your clipboard, ready to paste into your code.

FAQ

What is a Base64 data URI?
A Base64 data URI encodes binary file content as plain text in the format data:[mime];base64,[encoded], letting you embed images directly in HTML, CSS, or JSON without a separate file request.
Is my image uploaded to a server?
No. Encoding uses the browser's FileReader API and runs entirely on your device. Your image never leaves your browser.
Why does the Base64 output look much larger than the original image?
Base64 encoding expands binary data by roughly 33 % because it represents every 3 bytes as 4 ASCII characters. This is expected and normal.
Which image formats can I convert to Base64?
Any image your browser can read: PNG, JPEG, WebP, GIF, SVG, BMP, AVIF, and more. The MIME type is detected automatically from the file.
When should I use Base64 images instead of regular image files?
Base64 is ideal for small icons or logos embedded in a single-file HTML email, inline CSS, or a JSON API payload — places where a separate HTTP request would add latency or is not allowed. For large images, a regular file URL is more efficient.