Image Compressor

No. All compression happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device, making this tool completely private and secure. No data is sent to any server.

You can upload JPEG, PNG, WebP, BMP, and GIF images. The output format can be JPEG or PNG. For maximum compression, JPEG is recommended. PNG files can be converted to JPEG for significantly smaller file sizes.

The quality slider ranges from 1 to 100. Lower values produce smaller files but with more visual artifacts. Higher values preserve more detail but result in larger files. For most photos, a quality of 70-80 provides a good balance between file size and visual quality.

PNGs use lossless compression, so re-encoding a PNG through the Canvas API may sometimes produce a slightly larger file. For better results with PNG images, use the "Convert to JPEG" option, which typically reduces file size by 50-90% (note: this removes transparency).

Since processing happens in your browser, the limit depends on your device's available memory. Most modern devices can handle images up to 50MB or more without issues. Very large images may take a few seconds to process.