Forms rarely ask for a smaller photo. They ask for one under 100 KB, or between 20 KB and 50 KB. Give this the limit and it finds the best quality that fits, without you guessing at a slider.
Drop it above or pick it from your files. Add several if you have a set to get through, they are all handled on your own device.
Choose one of the usual limits, or type the exact number of kilobytes the form asks for. If it also demands a minimum size, tick the box and set that too.
You get the finished size and the pixel dimensions. If the limit turned out to be impossible, it says so rather than handing you a ruined picture.
There is no fixed relationship between a quality setting and a file size. The same setting that takes a plain headshot to 60 KB will leave a detailed street scene at 400 KB, because compression works by discarding detail and one of those pictures has far more detail to discard.
So guessing at a slider means exporting, checking the size, adjusting and exporting again. This does that loop for you, encoding the image several times and narrowing in on the highest quality that still fits. It usually settles in well under a second.
When the limit is very small, quality alone eventually stops helping and starts producing a smeared mess. At that point fewer pixels beat lower quality, so the picture is scaled down as well and the result tells you that it was. If even that cannot reach the number, you are told plainly instead of being given something unusable.
No. The work happens inside this tab, on your own machine. Open your browser's network tab while you use the tool, there is no request carrying your file.
Practical limits depend on the tool, browser and available device memory. Large files can fail even when no explicit limit is shown. Keep an original and use a smaller job if this device cannot finish it.
No, and there is no daily limit either. There is nothing to sign up for.
Because encoders cannot be told to produce an exact byte count. It finds the highest quality that lands under your limit, which is what a form is checking for.
Not for a size target. PNG compression is lossless, so there is no quality to trade away. Choose JPG, which is what most forms want anyway.
Tick the second box and set the floor. It will stop as soon as it lands inside the range instead of squeezing the file as small as it can.
Instead of guessing, the tool tries different quality levels and keeps the highest one that still fits under your limit. It does this by testing quality settings between 95 and 8 percent, narrowing down in about six passes, so you get the best looking file that fits.
If even the lowest quality is too big, it makes the picture smaller in pixels, up to four times, and tries again. The result is shown with its before and after size and its new dimensions, and you are told when it had to be resized.
Choose a limit from 20 KB to 2 MB, or type an exact number of kilobytes. Some forms also require a minimum size, and you can set that too, though it is best effort and never allowed to push the file over the maximum.
JPG is the default and the safe choice, because some government and university forms reject WebP. If a limit cannot be reached, you get the smallest file the tool could make with a message to raise the limit or crop the image first. Transparent areas become white in JPG.