Free Image Compressor
Compress and optimize images
Drag images or click to select
Supports JPG, PNG, WebP - multiple files OK
Selected files
Leave blank to use the selected quality. 1 KB = 1,000 bytes; pixel dimensions stay unchanged. Not every image can reach the target.
With a target, this quality is the upper limit and lower settings may be tried. Originals already within the target are kept.
Pixel dimensions stay unchanged. PNG is encoded as WebP; if the result is larger, the original is kept. Re-encoding an animation produces a still image.
Quality is an encoder setting, not a percentage of visual similarity. Size savings and visible changes depend on the image and browser. Inspect the result at its original dimensions.
What Is Image Compression?
Image compression reduces file size while preserving visual quality. It speeds up website loading, saves storage space, and solves email attachment size limits.
Lossy vs Lossless Compression
Quality is an encoder setting, not a percentage of visual similarity. Size savings and visible changes depend on the image and browser. Inspect the result at its original dimensions.
Why Image Compression Matters
Images account for over 50% of a typical webpage's data. Unoptimized images slow down page loads, waste mobile data, and hurt Google rankings. Image compression alone can improve page speed by 30-70%.
Compression by Format
Pixel dimensions stay unchanged. PNG is encoded as WebP; if the result is larger, the original is kept. Re-encoding an animation produces a still image.
Image Compression Best Practices
Quality is an encoder setting, not a percentage of visual similarity. Size savings and visible changes depend on the image and browser. Inspect the result at its original dimensions.