Compress Images Free - Reduce File Size Without Losing Quality

At quality 80, most JPG files see 50-70% file size reduction with no visible quality change at normal viewing sizes. Dropping to quality 60 can achieve 70-85% reduction with subtle compression artefacts in areas of fine detail. Photos with gradients compress more efficiently than images with sharp text or lines.

At quality 80 or above, compression is visually lossless for typical screen viewing and standard print. Below quality 60, you may notice JPEG artefacts in sharp-edged or highly-detailed areas. Use the quality slider to find the right balance - the before/after size display helps you decide before downloading.

JPG, PNG, WebP, and GIF. Files are compressed and downloaded in their original format. To convert between formats, use the Image Converter tool.

Never. All compression uses the HTML5 Canvas API and runs entirely in your browser. No image data is transmitted to any server. The tool works even offline once the page has loaded.

PNG is a lossless format - compression only removes redundant data without discarding image information. Reductions are typically 5-20%, compared to the 50-80% achievable with lossy JPG compression. For photos where file size is the priority, convert to JPG first using the Image Converter.

No server-imposed limits. Compress as many files as you like. The only constraint is your device memory, which handles dozens of large files without issues.

Quality 75-85 is the standard recommendation for web images - strong compression with imperceptible quality loss at screen sizes. Use quality 90 for hero images or images that will be clicked to full-size. Use quality 60-70 for thumbnails and previews where file size is the priority.

The tool processes GIF files, but Canvas output flattens animations to a single frame. For animated GIF compression that preserves animation, use a dedicated GIF optimiser tool.