How image compression works
Compression reduces file size by storing image data more efficiently. JPG and WebP can trade a little detail for much smaller files, while PNG is useful for crisp graphics and transparency.
Image Compressor
Image compressor guide
Make images lighter without making them look broken.
Use this compressor before uploading website images, social posts, product photos, blog graphics or client assets. It gives you control over quality, dimensions and file format while keeping processing local.
Lossy versus lossless
Lossy compression removes some visual data to reduce size. Lossless compression keeps image data intact, but the file savings are usually smaller.
JPG, PNG and WebP
Use JPG for photos, PNG for transparent graphics and WebP for a modern balance of quality, small size and transparency support.
Why resizing reduces file size
Large dimensions create more pixels to store. Resizing a photo to the size your website actually displays can reduce file size dramatically.
Compression without too much quality loss
Start around 75 to 85 percent quality, compare the preview, and only go lower when the image still looks clean at the size people will view it.
Privacy
The compressor runs in your browser. Full uploaded images are not saved permanently in localStorage or uploaded to Anulen's servers.
FAQ
Frequently asked questions
Is the image compressor free?+
Yes. You can compress and download images without creating an account.
Are my images uploaded?+
No. The compression workflow runs locally in your browser.
Which formats are supported?+
PNG, JPG, JPEG and WebP are supported for upload. Downloads can be JPG, PNG or WebP.
Does compression reduce quality?+
It can. Lower quality creates smaller files, but the preview helps you choose a balanced setting.
Can I resize images?+
Yes. You can keep original dimensions, resize by percentage, set custom width and height, and lock the aspect ratio.
Can I preserve transparency?+
Yes. Choose PNG or WebP output for images that need transparent areas.
What is the best format for websites?+
WebP is often the best default. JPG is good for photos, and PNG is better for logos or transparent graphics.
Is there a maximum file size?+
Yes. Uploads are limited to 15 MB, with safeguards for extremely large image dimensions.