How the Image Compressor Works

Our Image Compressor is a 100% browser-based tool for reducing the file size of your images without sending them to a server.

Browser-Based Compression

This tool uses the standard HTML5 <canvas> element and the toDataURL or toBlob methods to perform the compression:

1. Image Loading: When you select an image, we create an Image object in JavaScript and draw it onto a hidden <canvas> element.
2. Compression Control: We adjust the image quality by using the quality parameter of the canvas.toBlob(callback, type, quality) method.
3. Resizing: We can also reduce the image dimensions by scaling the canvas before drawing the image onto it.
4. Format Support: We support common web formats like JPEG, PNG, and WebP, leveraging your browser's built-in image encoding capabilities.

Privacy First

Unlike traditional online image compressors, your files are never uploaded:

• No File Transmission: Your images are processed entirely within your browser's memory. They never leave your device.
• Security: You can safely compress private photos, screenshots of sensitive documents, or proprietary graphics.
• Speed: Compression is often faster because there is no upload or download time involved.

Verification

You can verify that your images are never uploaded by opening your browser's Network tab (F12). You will see that no network requests are made when you select an image or click "Compress".