Which formats are supported?

JPG gives the biggest savings. PNG is lossless, so the quality slider has little effect on it; convert PNG photos to JPG first for much smaller files. WebP images are saved as JPG.

Can I compress multiple images at once?

Yes. Select or drop up to 50 images, compress them together at the same quality, then download them one by one or all at once as a ZIP file.

Can I compress an image to a specific size, like 50 KB?

Yes. Switch to Target file size and enter the limit. Each image is saved as a JPG at the highest quality that fits, and scaled down only if quality alone isn't enough.

Do you store my images?

No. Images are processed entirely in your browser using the Canvas API and are never uploaded.

Image Compressor

Compress images to reduce file size without uploading them.

Choose images

or drag and drop them here

JPG, PNG or WebP · up to 50 images

Processed entirely in your browser, nothing is uploaded, stored or seen by us.

Something not working, or a feature missing?Report a problem or suggest a tool

How to Use

1Drag and drop one or more images, or click to select them.
2Adjust the quality slider, or switch to Target file size and enter a limit such as 50 KB, then click Compress.
3Download each image individually, or all of them at once as a ZIP.

Features

Compress multiple images at once
Adjustable compression quality
Or compress to a target file size, like 20 KB or 100 KB
Shows original vs. compressed size
Download one image or all as a ZIP
No upload, 100% in-browser

PDUtilities Image Compressor reduces image file size directly in your browser using an adjustable quality slider, your images never leave your device.

How image compression works

A photo straight from a phone is usually 2–6 MB, far more than a website, email or form needs. JPEG compression shrinks a picture by discarding fine detail the eye is least likely to notice, and the quality slider controls how much is discarded. At 80–90% the difference is hard to see while the file is often half the size or less; below about 50%, blockiness and smeared edges start to show, especially around text and sharp lines.

The tool re-encodes your images at the quality you pick, up to 50 at a time, then shows the original size, the new size and the percentage saved for each, plus the totals. Download them one by one or all together as a ZIP. If re-encoding would not make the file smaller, which happens with images that are already well compressed, you get your original back instead of a bigger file.

Which quality to choose

Use	Quality	Notes
Photos for print or a portfolio	85–95%	Keeps fine texture and smooth gradients
Website and blog images	70–85%	The usual sweet spot for size versus looks
Email attachments, chat, forms	60–75%	Small files that still look fine on screens
Thumbnails and previews	40–60%	Artefacts are hidden at small display sizes

JPG, PNG and WebP behave differently

JPG responds directly to the quality slider and usually shrinks the most.
PNG is a lossless format, so browsers ignore the quality setting when saving it. PNG files rarely get much smaller here. For a big saving on a PNG photo, convert it with PNG to JPG or to WebP with the WebP Converter.
WebP images are saved as JPG by this tool. Any transparent areas will not be kept, so use the Format Converter if you need to stay in WebP.

Compression reduces bytes, not pixels. If a 4000 × 3000 photo will only ever be shown 1200 pixels wide, resizing it first saves far more than lowering quality.

Private by design

Compression happens in your browser using the built-in Canvas API, so the photo is never uploaded. That makes it safe for personal pictures, scanned documents and ID photos.