How to Compress Images Without Losing Quality
A visual, step-by-step guide to compressing JPG, PNG and WebP images with no visible quality loss — pick a quality level or an exact target size, right in your browser.
Compress images nowHeavy images are the number-one reason web pages load slowly and emails bounce back. The fix is compression — but done wrong, it turns crisp photos into mush. This guide shows you how to shrink JPG, PNG, and WebP files to a fraction of their size with no visible quality loss, using AmiIMG's free compressor. Everything runs locally in your browser: your photos never leave your device, and there is no signup, no watermark, and no batch limit below 50 files.
Compressing images, step by step
Open the compressor and add your images
Go to the AmiIMG image compressor and drag your images onto the drop zone — or click it to browse. You can queue up to 50 JPG, PNG, WebP, GIF, or BMP files at once and mix formats freely. Nothing is uploaded anywhere: the files are read directly on your machine.
Choose how far to compress
Two modes are available. Pick a quality level — High keeps photos essentially untouched, Recommended is the sweet spot for the web, and Extreme squeezes size hardest. Or switch to target file size and enter an exact limit, such as 100 KB per image; the engine iterates the quality setting until every result fits under your limit.
Compress and check the results
Hit the Compress Images button. Processing happens on your device, so a typical photo finishes in under a second. When it completes, each file card shows the before and after size, so you can see exactly how much you saved before downloading anything.
Download the compressed files
Save images one by one, or grab the whole batch as a single ZIP. The compressed files keep recognizable names, so they drop straight back into your website build or folder structure without any renaming.
Getting the best results
Which quality level should you pick?
For photos headed to a website, Recommended typically cuts file size by 60–80% with changes you would need a magnifying glass to spot. Reserve High for portfolios and print handoffs, and use Extreme where small size matters more than fine detail.
Pick the right format first
Photographs compress best as JPG or WebP. Screenshots, logos, and graphics with flat colors belong in PNG — or better, WebP, which usually lands 25–35% smaller than PNG at equal quality. Convert first, then compress.
Use target size when the limit is fixed
Upload forms and marketplaces that enforce a hard maximum — say, 2 MB or 500 KB — are exactly what target-size mode is for. The engine keeps re-encoding until every image fits, so nothing gets rejected at the door.
Frequently asked questions
Does compression change my image dimensions?
No. The compressor only re-encodes the image; the pixel width and height stay exactly the same. Use the resizer if you also want smaller dimensions.
Are my photos uploaded to a server?
No. Compression runs entirely in your browser. Your files are processed on your device and never leave it.
Why did my PNG barely shrink?
PNG is a lossless format, so quality-based compression has little to discard. Switch to target-size mode, or convert the image to JPG or WebP first, then compress.