Image Compressor

Shrink an image's file size, right in your browser.

Compress an image by re-encoding it as JPEG at an adjustable quality — nothing is ever uploaded anywhere.

How it works

Your image is drawn onto a canvas in your browser and re-encoded as JPEG at the quality you choose. Lower quality means a smaller file with more visible artifacts.

When it helps

Smaller images load faster on websites and fit within upload limits for email, forms and chat apps.

What quality really changes

JPEG compression throws away fine detail that the eye notices least. At 80–90% quality most photos look identical to the original but can be half the size or less. Below about 60%, you start seeing blocky patches and color banding, especially in skies and smooth gradients.

Images are also re-encoded at their current dimensions. If a photo is 4,000 pixels wide but will be shown at 1,200 pixels, resizing it first with the Image Resizer saves far more space than lowering quality.

Good targets

For websites, try to keep most images under 200–300 KB; hero images can be a bit larger. Email attachments and online forms often have limits of 1–10 MB. Try 80% first, check the preview, and step down only if the file is still too big.

Because the output is JPEG, transparent areas in PNG images won't be kept. For logos and graphics with transparency, keep the original PNG.

Frequently asked questions

Is my image uploaded?

No. Everything happens in your browser. The file never leaves your device.

What quality should I use?

70–80% is usually a good balance between size and visual quality for photos.

Can I compress the same image again?

You can, but each round loses a little more detail. It's better to compress once from the original at the quality you need.

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