How it lands inside the window
- Exact pixels first. The image is drawn at the size you set (or at its own proportions, up to the longest side you allow), stepping down by halves so a large phone photo shrinks cleanly.
- Then quality, measured. Sharpmonk encodes the JPEG, measures the bytes, and bisects the quality setting to find the highest one that fits under your maximum. Every number you see is the size of the file you'll download, not a guess.
- Then the minimum. If even top quality is under your minimum — common for small signatures — the file is padded up to it. How padding works.
Questions
Pick “Under 50 KB” and leave the pixel size on “Keep proportions”. Sharpmonk first lowers JPEG quality — which costs little visible detail until roughly 60% — and only then reduces the pixel dimensions, stopping as soon as the file fits. That keeps as much detail as the limit allows.
Set the minimum to 20 KB. If the image is too simple or too small to reach 20 KB on its own, Sharpmonk adds a padding block inside the JPEG — a standard comment segment that viewers ignore — so the file lands inside the window without being upscaled or blurred.
It depends on the website, and they rarely say. Sharpmonk aims for a file that passes either way: at least the minimum × 1,024 bytes and at most the maximum × 1,000 bytes.
Yes — switch to “Exact pixels” and enter the width and height. Drag the image to choose the crop, or use “Fit whole image” to keep all of it and fill the rest with white.
No. The whole process runs in your browser with the HTML canvas. There is no server that receives images — you can load this page, switch on airplane mode, and it still works.