Question 1

Are my images uploaded to a server?

Accepted Answer

No. All image processing happens entirely in your browser using the Canvas API. Your images never leave your device. This makes the tool completely private and works offline.

Question 2

Why does PNG compression have less effect?

Accepted Answer

PNG is a lossless format. The browser Canvas API cannot apply lossy quality settings to PNG exports. You will still see some size reduction from stripped metadata. For more compression, convert your PNG to JPEG or WebP instead.

Question 3

What quality setting should I use?

Accepted Answer

For photos, 70–85% quality gives an excellent balance between file size and visual quality. For images with text or sharp edges, use 85–90%. Below 60% may show visible artifacts on detailed images.

Image Compressor

Frequently Asked Questions

Image Compressor

Frequently Asked Questions

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