Open the PDF in OCRmyPDF with the command: ocrmypdf --output-type pdfa --optimize 3 input.pdf output_clean.pdf This creates a searchable, compressed file.
| Service | Cost | Quality | Repack Equivalent? | | :--- | :--- | :--- | :--- | | | Free | Excellent (hand-curated ePubs) | Yes – they repack public domain works. | | Internet Archive | Free | Variable (mostly raw scans) | No – but you can download and repack yourself. | | Project Gutenberg | Free | Good (volunteer-created ePubs) | Yes – essentially official repacks. | | Amazon Kindle Store | Paid | Perfect | N/A – original commercial files. | | Google Books (Preview) | Free for preview | Limited | No – partial content only. | dokumenpub books repack
Use Calibre’s metadata download feature (powered by Amazon and Google Books) to pull the correct cover, summary, and tags. Open the PDF in OCRmyPDF with the command:
Import the cleaned PDF into Calibre. Click "Convert Books" → Output format: EPUB. Under "Heuristic Processing," enable "Enable heuristic processing" and "Detect chapters, margins, etc." | | Internet Archive | Free | Variable
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