Image Compressor

Compress images up to 90% smaller without visible quality loss. Adjust quality, convert formats (PNG, JPG, WebP), and preview file size in real time.

100% Free No Signup Instant Results

Upload Image to Compress

Drag & drop your image here, or click to select

Accepted formats: PNG, JPG, WebP up to 20MB

Compression Settings

Quality70%

Smallest Best Quality

Output Format

Compress Images Without Losing Quality

Kalcify's Image Compressor uses browser-native compression algorithms to reduce file sizes dramatically while preserving visual quality. Adjust the quality slider for complete control, and convert between JPG, PNG, and WebP formats on the fly — all without uploading a single byte to our servers.

How to use this Image Compressor?

Upload Image

Drag and drop your image file (PNG, JPG, or WebP).

Adjust Quality

Use the slider to set compression quality from 10% to 100%.

Choose Format

Optionally convert between PNG, JPG, and WebP formats.

Download

Download the compressed image instantly.

Frequently Asked Questions

It depends on the original image. Photos can often be reduced by 60-90% with minimal quality loss. PNG graphics with flat colors compress even more.

JPG is best for photos (lossy, small files). PNG preserves transparency and sharp edges (lossless). WebP offers the best of both worlds with smaller files, but has limited support in older software.

No. All compression happens entirely in your browser using Web Workers. Your images never leave your device.

You can upload images up to 20MB. For best performance, we recommend images under 10MB.

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