Guide
Almost every "compress my image" situation starts the same way: some form, upload field, or set of instructions says your file needs to be under a certain size — 200KB, 1MB, whatever the limit is — and you need to get there without ruining the photo.
Check exactly what the destination requires. A government form might say "under 100KB." A CMS might just show an error after you try uploading. If you’re not sure, common limits to check against are 50KB, 100KB, 200KB, 500KB, 1MB, and 2MB — nearly every upload limit you’ll encounter falls near one of these.
Traditional compressors ask you to pick a quality percentage — 60%? 80%? — and you find out afterward whether that was enough. It's backwards. A target-size tool like FitImage's Image Compressor works the opposite way: you say the limit, and it searches for the highest quality that still fits under it.
WebP typically compresses photos smaller than JPG at the same visual quality, and PNG is the only safe choice if your image has transparency. You don't need to know this in advance — a good tool tries the right formats for your specific image and picks whichever gets you under your target with the least visible loss.
If your target is very small (50KB) relative to your image's original detail, quality adjustment alone may not be enough — the tool needs to shrink the pixel dimensions too. This isn't a failure, it's expected physics: a highly detailed 4000-pixel-wide photo simply can't fit meaningfully into 50KB without either losing quality or losing dimensions. A transparent tool will tell you exactly what it did, rather than hiding it.
Always look at the real before/after numbers — original size, final size, and the percentage saved — rather than trusting an estimate. If a target genuinely isn't achievable without visible damage, an honest tool says so and gives you its best result instead of pretending it hit the number.