500KB is a comfortable target. Most documents reach it with light compression that keeps text sharp, which makes it the safest choice when a portal allows up to half a megabyte.
At 500KB the compressor rarely needs to rasterise whole pages, so text stays selectable and the document still looks professional. It covers the majority of email and upload limits.
People jump straight to the most aggressive setting when a form only needs under 500KB, and end up with a blurry document for no reason. Try the lightest option first and only escalate if the result is still too large.
Open the downloaded file and zoom in on the smallest text. If it is still crisp and the size is under your limit, stop there.
Usually yes at this size. Light compression preserves the original text layer.
Very large inputs are limited by your device memory, since everything runs locally. Splitting a huge file first is more reliable.
Yes. No account, no watermark, no per-file charge.