How to use this page
- Choose a JPG, PNG or WebP image in the workspace above.
- Keep JPG or WebP selected and confirm the target is 300 KB.
- Compress on this device, check the actual size, then download.
Worked example: a worksheet photo for a 300 KB drop box
Photograph the page square-on, crop to the paper edge, then compress to 300 KB as JPG. If the text is still soft, the source is the problem — retake the photo closer before lowering quality again. Keep the original in case the tutor asks for a clearer copy.
What this job is for
Screenshots of slides and whiteboards fare better if you crop the unused desktop first. Photos of workbook pages should be lit evenly; heavy compression on a dark phone snap turns the writing to mush.
Useful limits
A 300 KB cap is not an excuse to upload a 4000-pixel canvas. Resize to the width the page shows, then compress.
The live tool behind this page is Image Compressor. It is the same local engine as the rest of Image Cosmos.
Frequently asked questions
Will 300 KB keep a diagram sharp?
If you crop to the diagram and avoid a second compression pass, usually yes. Fine pencil lines suffer first.
Can I batch a whole folder?
This tool processes one image at a time in the browser. Repeat from each original file.
Does the LMS receive a copy from Image Cosmos?
No. You download the result and upload it yourself. Image Cosmos never sees the file.