How the image compressor works
Your browser draws each photo onto a hidden canvas and saves it again with the quality you choose. Lower quality means a smaller file. You can also limit the longest side, for example to 1600 pixels, which shrinks big phone photos a lot. Everything is done on your device, so nothing is uploaded and there is no waiting for a server.
Good settings for common needs
- WhatsApp and social media: quality 75, longest side 1600 px.
- Job and admission forms (under 100 to 200 KB): quality 60 to 70, longest side 1000 to 1200 px.
- Website images: WebP at quality 75 to 80.
Privacy and tips
- ID cards, passports and certificates stay on your phone or computer. That is the main reason to prefer an in-browser tool.
- Keep your original. Compression removes detail you cannot get back.
- Need an exact pixel size? Use the Image Resizer and Converter. To join photos into one document, use Image to PDF.
Frequently asked questions
Are my photos uploaded anywhere?
No. The compression happens inside your browser using your own device. Your photos are not sent to any server, so this is safe for personal and ID photos.
How do I compress an image to under 100 KB for a form?
Start at quality 70. If the file is still too big, lower the quality in steps of 10, or reduce the maximum width to about 1200 pixels. The result size is shown next to each photo.
JPEG or WebP: which is better?
WebP is usually 25 to 35 percent smaller at the same look, and works on modern phones and browsers. Choose JPEG when a form or older app asks for .jpg.
Will the picture look worse?
Slightly, as quality goes down. Between 70 and 85 most photos look almost the same as the original. Below 50 you may see blocky patches.
Why did a file get bigger?
Small images that were already compressed, or PNG screenshots with flat colours, can grow when saved again. The tool marks such files so you can keep the original.