Free Image Compressor - Reduce Image Size in Your Browser

Choose image

Output format

Quality: 78%

Max dimensionLongest side in pixels

Select an image file to begin.

Original

Dimensions-

File size-

Compressed

Dimensions-

File size-

OutputWebP

How to compress an image without guessing

Start with moderate settings, compare the output, and reduce quality or dimensions only as far as the destination requires.

Choose the image

Open the original file and note its dimensions and size. Keep a separate copy of the original if you may need to edit it later.
Set format, quality, and size

Choose an output format, set a quality level for compressed formats, and limit the longest side when the original resolution is larger than needed.
Compress and compare

Review the preview, dimensions, final size, and estimated savings. Adjust one setting at a time if the result is too large or visibly degraded.

For web photos, WebP around 70–85% quality is a useful starting range, not a universal rule.
Reduce pixel dimensions before pushing quality very low; oversized images waste bytes even when compressed.
Keep PNG for transparency or crisp flat graphics, and expect photographic PNG files to remain relatively large.

Lossy compression permanently removes image information, so keep the original file.
Repeatedly compressing an already compressed image can add visible artifacts and color banding.
Browser re-encoding may remove metadata and animation; this tool is intended for ordinary still images.

No. Kitly compresses images locally in your browser with canvas processing, so your selected files do not need to leave your device.

Lower the quality setting, reduce the maximum dimension, or use an efficient compressed output such as WebP when the destination supports it.

Yes. The tool shows the original and compressed file details so you can compare dimensions, output format, file size, and estimated savings.