PNG files can balloon in size fast, especially screenshots. Here's how to get one under a 100KB limit without it turning to mush.
Unlike JPG, PNG compression is lossless — there's no quality slider that meaningfully shrinks a PNG the way it shrinks a photo. If a PNG is over 100KB, the most reliable fix is usually to reduce its pixel dimensions, or convert it to WebP, which compresses far more efficiently while still supporting transparency.
Open Squeezr and drop in your PNG.
If the image doesn't need to be huge, turn on Resize and reduce the pixel dimensions — this has the biggest impact on file size for PNGs.
Set Output format to WebP if you need to keep transparency, or JPG if you don't.
Adjust the quality slider and watch the live file size readout until you're under 100KB.
Download — Squeezr shows you the exact before/after size so you know it cleared the limit.
Skip the manual math — open Squeezr with this preset already dialed in.
Open Squeezr with WebP preset →PNG's compression is lossless by design — it never throws away pixel detail, so there's a hard floor to how small a given image can get while staying PNG. If you need a real size reduction and don't need transparency, converting to JPG will usually get you there. If you do need transparency, WebP compresses far better than PNG at equivalent quality.
Some upload forms specifically require PNG. In that case, dimension reduction is your main lever — half the width and height roughly quarters the file size, since PNG size scales with total pixel count. Flattening a transparent background to solid white (if transparency isn't needed) can also help slightly, since fewer distinct colors compress better.