CloudConverter
Image CompressorBig images slow down websites, bounce off email size limits and get rejected by upload forms with a 1 MB or 2 MB cap. This compressor shrinks JPG, PNG, WebP and AVIF files while keeping the same format, so a JPG stays a JPG and a transparent PNG stays transparent. Photos straight from a phone camera often shrink by 40 to 80 percent with no difference you can see.
How the compression works
JPG files are re-encoded with MozJPEG, an encoder made by Mozilla that produces smaller JPGs than a phone or camera at the same visual quality. WebP and AVIF are re-encoded with their own modern encoders.
PNG files are reduced to an optimised colour palette with smooth dithering (the same technique popular PNG shrinking services use), then packed with maximum lossless compression. Screenshots, logos and graphics usually shrink a lot; transparency is kept.
Camera details and GPS location are removed in the process, which saves space and protects your privacy. Photos are turned the right way up, so they display correctly everywhere.
If an image is already well optimised and cannot get smaller, you get the original file back instead of a bigger one.
Getting under a size limit
Most of a photo’s file size comes from its pixel count. A 12-megapixel phone photo (about 4000 pixels wide) is far bigger than any screen needs. Choosing “Max 1920 px wide” together with Balanced compression usually brings a photo well under 1 MB, and “Max 1280 px” under 500 KB, while it still looks sharp on phones and laptops.
For upload forms with very strict limits (for example 100 KB or 200 KB for an exam or ID photo), use Strong compression with Max 800 px wide.
Where this comes in handy
Website speed
Smaller images make pages load faster and help your Google PageSpeed score.
Upload forms
Get photos and scans under the size limit of job, exam, visa and government portals.
Email attachments
Send many photos in one email without hitting the 20-25 MB limit.
Phone storage
Keep smaller copies of photos and screenshots you want to archive.
Frequently asked questions
Will compression make my images look worse?
At the Balanced level the difference is very hard to see in normal viewing. Strong compression can show slight softness in fine detail. You can always go back to the original, which never changes.
Does it change the format?
No. JPG stays JPG, PNG stays PNG, WebP stays WebP and AVIF stays AVIF. To change the format, use the Image Converter.
How many images can I compress at once?
Up to 20 images per batch, each up to 50 MB. Download them one by one or all at once as a ZIP file.
Is transparency kept in PNG files?
Yes. Transparent areas stay transparent.
Are my images stored?
No. Each image is compressed in memory and discarded as soon as it is sent back to you.
Image to 20 KB
Image to 50 KB
Image to 100 KB
Image to 200 KB
Image to 500 KB
Image to 1 MB