How to compress images online

Upload Images

Drag and drop your JPG, PNG, or WebP files onto the dropzone, or click to browse. Upload as many as you need.

Adjust Settings

Move the quality slider to control compression. Choose an output format — WebP gives the smallest files for the web.

Download & Save

See the size comparison for each image, then download them individually or all at once with a single click.

Free Online Image Compressor — Reduce JPG, PNG & WebP Size

Large image files are one of the biggest causes of slow websites. Our free online image compressor uses your browser's built-in Canvas API to reduce image file sizes by up to 90% — with no server upload, no account required, and no watermarks on your output.

Why Compress Images for the Web?

Faster page loads — Compressed images dramatically reduce load time, improving user experience
Better Core Web Vitals — Google's LCP (Largest Contentful Paint) scores improve significantly with smaller images
Higher SEO rankings — Page speed is a confirmed Google ranking factor
Lower bandwidth costs — Smaller files mean less data transfer on your hosting plan
Better mobile experience — Faster loads for mobile users on slower connections

JPEG vs PNG vs WebP — Which Should You Choose?

JPEG is best for photographs and images with many colors. It uses lossy compression and achieves excellent size reductions, but doesn't support transparency.

PNG is best for graphics, logos, and images with transparency. Compression is lossless (quality stays perfect), but files tend to be larger than JPEG.

WebP is the modern choice for web images. It supports both lossy and lossless compression, offers 25–35% smaller files than JPEG/PNG at equivalent quality, and is supported by all modern browsers.

How Does Client-Side Image Compression Work?

When you upload an image, JavaScript reads it using a FileReader and draws it onto an HTML5 Canvas element. The canvas then re-encodes the image using the browser's native codec with the quality setting you specify. The result is a new compressed Blob that is downloaded directly to your device — your original image data never leaves your browser.