Compress Image to 300KB Online Free
300KB is a comfortable limit: enough to keep a full-resolution photo genuinely sharp while still satisfying most upload forms and content management systems.
The compressor here is preset to 300KB, so you can drop in a camera photo and get a web-ready file without touching any settings.
Your file never leaves your browser. All processing happens on your device. Nothing is uploaded to any server.
When you need 300KB
- Document and certificate photo uploads
- Blog and product images that need to stay crisp
- Portals that allow up to 300KB or 500KB
Other size targets
Need a different size or a quality slider instead? Use the compress image. New to it? read the guide.
Frequently asked questions
Yes. For a typical photo at normal viewing sizes, 300KB leaves plenty of budget and the compression is hard to notice.
If the image is far larger than it will ever be displayed, resizing first gets you to 300KB with much better quality than compression alone.
No. The image is compressed locally in your browser.
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Every category runs free in your browser — nothing is uploaded.