Crucialio
Crucialio / Reduce image file size with a quality control and choose the output format.
Free • Private • Browser-based

Reduce image file size with a quality control and choose the output format.

Compress JPG, PNG or WebP images in your browser with adjustable quality. Free, private and no signup.

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Drop an image hereor click to choose a JPG, PNG or WebP

How it works

JPEG and WebP usually respond strongly to the quality setting. PNG is lossless, so browser re-encoding may not always make a PNG smaller.

Why use Crucialio?

This tool is designed for quick one-off image jobs with no account requirement. Processing for supported files happens on your device, which also avoids waiting for uploads and downloads before the work begins.

Frequently asked questions

Are my images uploaded?

For the tools on this page, image processing happens in your browser. Your selected image does not need to be uploaded to Crucialio.

Is there a watermark?

No. Crucialio does not add a watermark to downloaded images.

What does this reduce image file size with a quality control and choose the output format. tool do?

JPEG and WebP usually respond strongly to the quality setting. PNG is lossless, so browser re-encoding may not always make a PNG smaller.

Related image tools

Resize an image by entering the exact width and height in pixels. Keep the aspect ratio locked to avoid stretching.
Resize image dimensions in pixels directly in your browser. Free, private, no signup and no watermark.Scale an image proportionally by a percentage without calculating width and height yourself.
Resize an image by percentage in your browser. Scale to 25%, 50%, 75%, 150% or any custom amount.Enter a target size and Crucialio will search for a JPEG quality level that fits under it when possible.
Compress an image toward a target file size in KB. Runs locally in your browser and outputs JPEG.