Zamzar and Epublys for EPUB Tasks
Zamzar and Epublys both let you convert a file and download the result on the website. Zamzar's email notification is optional: its official FAQ describes direct downloads after clicking Convert Now. An email wait is not a reason to switch.
This comparison is written by Epublys. The difference to consider is a broad format converter versus a toolkit for working inside EPUB books.
Where Zamzar is useful
Zamzar supports document, image, audio, video, ebook, CAD and archive conversions, with web, desktop and API options. Keep using it when your job spans those formats. Check its current free allowance, file-size limit and paid plans before starting a large batch.
Where Epublys fits
- EPUB editing: the metadata editor changes book metadata and covers; the splitter extracts a chapter range into one EPUB or returns individual chapters in a ZIP.
- EPUB checks: the validator checks package structure and file references, with mimetype and missing-language repairs. It is a first pass, not full EPUBCheck.
- Developer access: REST and MCP expose the same toolkit through one API key.
- File handling: uploaded files are processed in memory without persistent file storage, and the result is returned to the current tab.
Free and paid limits
Epublys free allows 3 tool operations per day, 5MB per file by default and 20MB total per operation. PDF-to-EPUB accepts 10MB and split accepts 15MB on free. Pro is $9/month or $72/year, removes the daily cap and raises the total to 30MB. Compare the files you actually process against both products' limits; Epublys is not an unlimited free converter.
Check conversion quality
Use a sample containing the things your books depend on: headings, images, non-Latin text or footnotes. Compare the result in your reader before committing a whole collection. Epublys creates a new PDF layout from EPUB content and does not perform OCR on scanned PDFs.
For more detail, read EPUB-to-PDF methods or PDF-to-EPUB methods. Keep the general converter when its format coverage is what you need; use EPUB tools when the task is editing, validating or reorganising a book.
Try it now — free
Convert DRM-free EPUB books to PDF for printing. Choose A4 or US Letter, fonts and page numbers. Free within file and daily limits, no signup.
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