AppHelp
Convert images and data URLs both ways
Encode any image as a Base64 data URL for inline CSS or HTML, or paste a data URL to preview and download the image — everything runs locally.
No image selected yet.
Common tasks
- image to data url online
- free image to data url
- image to data url no upload
- browser local image to data url
- image to data url for developers
- data-url image data url tool
- base64 image data url tool
- inline image data url tool
Features
- Encode images to Base64 data URLs
- Decode a data URL back to a downloadable image
- Show data URL length and byte size
- Runs entirely in the browser with no uploads
Frequently asked questions
- What is a data URL?
- A data URL embeds file contents directly as a Base64 string, letting you inline an image in HTML or CSS without a separate request.
- Why is the data URL larger than the file?
- Base64 encoding adds roughly 33% overhead, so the encoded string is always bigger than the original binary image.
- Are my images uploaded anywhere?
- No. Encoding and decoding happen locally in your browser and nothing leaves your device.