Image to Base64 Converter
Upload an image to get its base64 encoded string with a live preview.
Drag & drop an image here, or click to select a file
Supports PNG, JPG, GIF, SVG, WebP, and more
About Image to Base64 Converter
This free online tool converts any image file into a base64 encoded string that you can embed directly in HTML, CSS, or JavaScript. All processing happens in your browser using the FileReader API — no data is uploaded to any server. Base64 encoding represents binary image data as an ASCII string, making it possible to include images inline without separate HTTP requests.
How to Use
- Drag and drop an image onto the upload area, or click to open a file picker.
- The tool reads the image and displays a preview along with the full data URI and raw base64 string.
- Click Copy Data URI to copy the complete string including the
data:image/...prefix, ready for use in an<img>tag or CSSurl(). - Click Copy Base64 to copy only the base64 payload without the MIME prefix.
Frequently Asked Questions
What is base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using a set of 64 ASCII characters. It is commonly used to embed images in HTML or CSS without requiring a separate file request.
Why is the base64 string larger than the original file?
Base64 encoding increases the data size by approximately 33% because it represents every 3 bytes of binary data as 4 ASCII characters. This trade-off is acceptable for small images where eliminating an HTTP request is more beneficial.
Is my image uploaded to a server?
No. All conversion happens entirely in your browser using the JavaScript FileReader API. Your image data never leaves your device.
What image formats are supported?
Any format your browser supports can be converted, including PNG, JPEG, GIF, WebP, SVG, ICO, BMP, and TIFF.