Ebook Converter
Convert documents to EPUB, MOBI, AZW3.
Choose Ebook or Document File
Drag & Drop your book file here or click to browse (EPUB, MOBI, AZW3, PDF, TXT)
Why Use Our In-Browser Ebook Converter?
100% Private In-Browser Conversion
Your creative manuscripts, research papers, and copyrighted book libraries never touch external cloud servers. All conversions execute locally within browser memory.
Universal e-Reader Compatibility
Convert your documents to EPUB for seamless reading on Apple Books, Kobo, Barnes & Noble Nook, reMarkable tablets, and Amazon Kindle (via Send to Kindle).
Standards-Compliant EPUB 3 Packaging
Our compiler structures clean XHTML chapters, OPF metadata manifests, and navigation maps that render with dynamic text reflow on all screen sizes.
Free, Unlimited & No Watermarks
Convert complete novels without page limits, subscription hurdles, or forced branding watermarks added to your books.
How to Convert Ebooks Online
- Upload Ebook or Document: Drag and drop your `.epub`, `.mobi`, `.azw3`, `.pdf`, or `.txt` file into the upload box.
- Choose Target Format: Select EPUB (for e-readers), PDF (for fixed-layout printing), or Plain Text.
- Convert & Read: Click "Convert eBook" to assemble your file client-side and download the finished book.
When to Choose EPUB vs. PDF for Reading?
Choose EPUB for reading novels and textbooks on e-ink readers and smartphones because EPUB supports reflowable text (font sizes and margins adjust smoothly to any screen). Choose PDF when layout fidelity is crucial, such as sheet music, complex diagrams, or fixed-print publications.
Ebook Formats Compared: EPUB vs. PDF vs. MOBI vs. AZW3 vs. TXT
An architectural comparison of digital publishing formats and reader support:
| Format | Text Reflow | Hardware & App Support | Standard Status | Best Experience |
|---|---|---|---|---|
| EPUB (.epub) | 100% dynamic reflow | Apple Books, Kobo, Kindle (Send-to-Kindle), Nook, Calibre | Open W3C / IDPF Industry Standard | E-ink readers, novels, bedtime mobile reading |
| PDF (.pdf) | Fixed layout (no reflow) | Universal across all browsers, computers, and devices | ISO Standard | Textbooks, magazines, technical papers, printing |
| MOBI (.mobi) | Reflowable | Legacy Amazon Kindle devices & Kindle app | Deprecated proprietary Kindle format | Older Kindle devices (convert to EPUB recommended) |
| AZW3 (.azw3) | Reflowable (KF8) | Modern Amazon Kindle devices | Proprietary Amazon format | Kindle Paperwhite / Oasis native reading |
| Plain Text (.txt) | Basic line wrapping | Universal (any text reader, notepad, or terminal) | Standard ASCII / UTF-8 | Distraction-free minimalist reading & note taking |
Explore Related Document & Reading Tools
Manage your reading material and document formats with our free in-browser tools:
π Free Online Ebook Converter Guide
Use our web-based **Ebook Converter** to process your files securely without installing software. Because processing happens entirely inside your browser sandbox via WebAssembly (WASM), your confidential files are never uploaded to any remote server.
π 100% Private Document Sandbox
Convert or edit sensitive documents, legal templates, or work forms knowing they stay local on your computer. No data is stored or logged.
β‘ High-Fidelity Formats
Preserves tables, margins, text blocks, and vector layers during exports between Word (DOCX) and PDF structures.