Question 1

How does browser-based image compression work?

Accepted Answer

QTool.io's Image Compressor uses your browser's built-in Canvas API to re-encode images at a lower quality setting. Your images are processed entirely on your device — nothing is uploaded to any server, ensuring complete privacy.

Question 2

What image formats are supported?

Accepted Answer

QTool.io supports JPEG, PNG, and WebP formats. You can also convert between these formats during compression. For example, you can upload a PNG and download it as a compressed JPEG or WebP for smaller file sizes.

Question 3

Is there a file size limit?

Accepted Answer

QTool.io supports images up to 50 MB. Since all processing happens in your browser, very large images may take a moment to process depending on your device's capabilities.

Question 4

Will compression reduce image quality?

Accepted Answer

You have full control over the quality slider (1-100%). At 75-80% quality, most JPEG images look nearly identical to the original while being significantly smaller. QTool.io shows a side-by-side comparison so you can verify the result before downloading.

Image Compressor

Drop an image here or click to browse

Original

Compressed

Need something more powerful?

Image Compressor

Drop an image here or click to browse

Original

Compressed

Need something more powerful?

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