Set the size the way the website says it
- “Maximum 100 KB” or “under 100 KB” → File size: Max, 100 KB.
- “Between 20 KB and 50 KB” → File size: Range, 20 to 50 KB.
- “Not more than 1 MB” → Max, 1, then switch the unit to MB.
Or paste the rules
Copy the requirement text from the upload page and paste it into “What does the website require?”. Zekoya picks out the format, pixel size and KB limits automatically — and converts inches or millimetres to pixels when a DPI is given. It runs on your device and nothing is sent anywhere.
How KB is counted
A maximum is treated as 1,000 bytes per KB and a minimum as 1,024 bytes per KB. That way the file passes whichever definition the website uses.
Questions
Can I make a file bigger in KB?
Yes, for a minimum size. Zekoya first raises the quality; if that isn’t enough, it adds neutral padding to JPG or PNG files.
Does resizing in KB change the pixel size?
Only if you haven’t set exact dimensions and the limit can’t be met otherwise. The result tells you the final size.