✦How it works: Each PDF page is rendered to an image then packed into a fixed-layout EPUB. Kindle receives crisp pixel-perfect pages with no reflow blur. Everything runs locally — nothing is uploaded.
Reducing file size:Greyscale is the single biggest lever — it removes all colour data, cutting size ~65% with no visible quality loss on e-ink displays. Lower DPI is the second biggest lever; the Paperwhite screen is only 1236×1648px, so rendering above ~150 DPI gives zero visible benefit. JPEG quality 70–80% is indistinguishable on e-ink at reading distance.
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