PDFtuning Mate for Kindle and E-readers

Hey Product Hunt! 👋 As a heavy PDF note-taker who can’t read without annotating, I’ve plowed through thousands of pages for certification exams — all on e‑readers. Over the years, I’ve tested dozens of devices. Kindle’s PDF experience feels stagnant, while many Chinese brands pack in features but mostly focus on rendering (themes, OCR, translation) — not actually optimizing the PDF files themselves. You don't have to be PDF pro dealing with complex heavy tools. . For anyone deep into academic papers, technical docs, or long reports, it’s a nightmare. Fed up with band‑aid solutions, I built PDFtuning Mate, which is NOT just another PDF converter. It’s laser‑focused on fixing real pain points of reading PDFs on e‑readers: • Smart Crop Automatically trims huge margins, redundant headers & footers, and expands the text area. No more constant zooming, and annotations stay perfectly aligned. • One‑Click Clickable TOC Instantly generates a clean, navigable table of contents — with preview — for huge docs without proper structure. No more messy, subscription‑based AI tools. • Multi‑Column to Single‑Column or pure text Reflow (Beta) Turns complex layouts into smooth, single‑column text that fits any screen. No more left/right swiping just to read one sentence. With Pure Text option, reduces file size by 95%+ for text‑focused reading, making load times blazing fast — even on older e‑readers. • E‑Ink Optimized Images Optimizes images to 256-level grayscale, boosts contrast, and removes background watermarks without damaging content. Scanned docs finally look crisp. • Smart PDF Compression Adjustable PPI, auto‑removes hidden objects & unused fonts — shrinks files without losing readability. • Live E-reader Preview I spent weeks mapping resolutions & PPI for 30+ popular e‑readers (including Kindle Scribe Colorsoft & Kobo models). See exactly how your PDF will look before exporting — no more guesswork. If you’re tired of fighting with PDFs on Kindle, Scribe, or any e‑reader — this app is built for people who actually use these devices for serious reading and work. Give it a try. I’d love your thoughts, feedback, or bug reports — let’s make it even better together.