Question 1

How do I compress an image without losing quality?

Accepted Answer

Use WebP or PNG output with a high quality setting (85–95). WebP typically achieves 25–35% smaller file sizes than JPEG at the same visual quality. For photographs, JPEG at 80–90% quality is imperceptible to most viewers while cutting file size significantly.

Question 2

What is the best free image compressor online?

Accepted Answer

The best compressor depends on your use case. For photographs, JPEG or WebP compression gives the smallest files. For illustrations, logos or images with transparency, PNG is better. This tool lets you compare the before/after side by side so you can judge the quality trade-off yourself.

Question 3

How do I reduce image file size for email?

Accepted Answer

Most email clients work best with images under 1MB. Use the Target Size mode and set a maximum of 500 KB or 1 MB. For photos, JPEG or WebP output will get the best results. If you need transparency, use PNG.

Question 4

How do I compress a PNG file?

Accepted Answer

PNG uses lossless compression, so quality doesn't degrade but file sizes can be large. You can reduce PNG size by reducing the number of colours or by converting to WebP (which supports transparency). This tool can compress PNGs and optionally convert them to WebP for much smaller files.

Question 5

What is the difference between lossy and lossless compression?

Accepted Answer

Lossy compression (JPEG, WebP) permanently removes some image data to achieve smaller files. The quality loss is usually invisible at high settings. Lossless compression (PNG) reorganises the data without removing any — the file is smaller but the image is pixel-perfect identical to the original.

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