Question 1

How does browser-based image compression work?

Accepted Answer

This tool uses the HTML5 Canvas API to compress images entirely in your browser. When you upload an image, it is drawn onto an invisible canvas element. The canvas then exports the image at your chosen quality level using the toBlob() method, which re-encodes the image with lossy or lossless compression. No data is ever sent to a server.

Question 2

What image formats are supported?

Accepted Answer

This compressor supports JPEG and PNG images. JPEG compression is lossy, meaning it reduces file size by discarding some image data based on your quality setting. PNG compression is lossless when exported as PNG, but you can also convert PNG to JPEG for significant size reduction.

Question 3

Will compressing my image reduce its quality?

Accepted Answer

JPEG compression is lossy, so lowering the quality slider will reduce visual fidelity. However, quality settings above 70-80% typically produce images that look virtually identical to the original while being significantly smaller. Use the before/after comparison to judge the results.

Question 4

Is there a file size limit?

Accepted Answer

Since everything runs in your browser, the only limit is your device's available memory. Most modern devices can handle images up to 20-30 MB without issues. Very large images (50 MB+) may be slow to process on older devices.

Question 5

Is my image data private?

Accepted Answer

Yes, completely. Your images never leave your device. All processing happens locally in your browser using the Canvas API. No images are uploaded to any server, and nothing is stored or logged. You can even use this tool offline after the page loads.

Question 6

Can I resize my image while compressing it?

Accepted Answer

Yes. Use the max width and max height fields to resize your image during compression. The image will be scaled down proportionally to fit within the specified dimensions. If your image is already smaller than the max dimensions, it will not be enlarged.

Image Compressor

How It Works

Upload Your Image

Adjust Settings

Download Result

Frequently Asked Questions

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