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

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