Compress Image gets a photo under the size limit a form, an email or a website imposes, while keeping it good enough to look at. You control both the quality and the maximum width, which together decide the final size.
Most of the weight in a phone photo is resolution nobody looks at. Capping the width at what the page actually displays usually saves more than quality alone — and it all happens in your browser.
How to use
Add the image that is too heavy.
Set the quality, and cap the maximum width if the picture is far larger than it needs to be.
Check the resulting size and download.
FAQ
How do I get a photo under 100 KB?
Lower the quality and set a maximum width — for example 1200 pixels. Width is usually the bigger lever, because a phone photo is often four times wider than any page displays it.
Will it look worse?
At moderate quality the difference is hard to see on screen. Aggressive settings soften details, so compare the preview before downloading.
Does it keep the original file?
Yes. Your source image is never modified — the tool writes a new file, so you can compare the two and keep whichever you prefer.
Is the photo uploaded anywhere?
No. Compression runs entirely in your browser, which is why there is no upload wait and no copy of your photo on a server.