SimpleToolsHub

PDF to EPUB Converter — Kindle-Ready, Browser-Only

Convert a PDF to EPUB 3 (with EPUB 2 fallback) right in your browser. Choose reflowable text or image pages, add a cover, and Send to Kindle—your files never leave your device.

Preview (first page)

Reflowable options

Advanced text shaping

With “Kindle compatibility” ON, fixed page width/height are ignored to let readers control layout.

Image pages options

For e-ink Kindles, 1200–1600px width keeps files small and sharp. JPEG is usually best.

Metadata & cover

Waiting for PDF…

Frequently Asked Questions

Are my PDFs uploaded anywhere?No. Conversion runs entirely in your browser; files never leave your device. You can even use the page offline once it’s loaded.
How do I send the EPUB to my Kindle?Download the EPUB and use Send to Kindle (web, desktop, or email). Amazon converts it to a Kindle format for delivery.
Does Kindle read EPUB directly?Kindle devices primarily read Amazon’s own formats. When you send an EPUB with Send to Kindle, Amazon converts it to a Kindle format. This tool focuses on clean, Kindle-friendly EPUBs.
PDF to EPUB: Reflowable text vs Image pages — which should I choose?
  • Reflowable text — best for mostly textual PDFs (novels, reports, research papers); readers can change font size, margins, and themes
  • Image pages — best for highly designed or complex PDFs (magazines, brochures, comics, manuals); larger files and text won’t reflow
EPUB 3 vs EPUB 2 — which should I use?EPUB 3 is recommended for modern navigation and metadata and works well with Send to Kindle
EPUB 2 is available for older readers and workflows
Why doesn’t the EPUB look exactly like my PDF?PDF is fixed-page; EPUB reflows so readers can change text size. Choose Image pages for pixel-accurate layout, or Reflowable for a better reading experience.
My PDF is scanned (no selectable text). What should I do?Reflowable output needs real text. For scanned PDFs, use Image pages. If you want reflowable text, OCR the PDF first to add selectable text.
Quick, Kindle-ready setup (recommended)Reflowable + EPUB 3; smart de-hyphenation; continuous flow; relative CSS; first-page cover
For highly designed docs: Image pages with JPEG (≈0.8 quality), optional monochrome, max width around 1400–1600 px
How can I shrink the EPUB file size?Use JPEG instead of PNG for photos; lower JPEG quality (≈0.7–0.85); enable monochrome for black-and-white content; reduce render scale; cap max image width to ~1200–1600 px
What image settings work well for e-ink Kindles?A maximum width of about 1200–1600 px with JPEG quality around 0.8 balances clarity and size; monochrome helps for text-heavy documents
Will fonts be embedded?Reflowable EPUBs typically rely on reader fonts for best compatibility and smaller size
Image pages rasterize pages, so separate font embedding isn’t needed
Does the EPUB include a cover and table of contents?Yes. You can use the first PDF page as the cover. Navigation is generated automatically (EPUB 3 nav and EPUB 2 NCX) with a sensible reading start.
Language and right-to-left (RTL) supportChoose the correct language. For Arabic/Hebrew/Farsi, EPUB 3 uses right-to-left page progression so navigation feels natural.
Do page width and font size depend on the Kindle model?Reflowable EPUBs — readers control appearance; prefer relative units
Image pages (fixed layout) — a per-page viewport is set and devices scale it to fit
Can I convert only a range of pages?This tool converts the whole PDF. To limit pages, export a page range from your PDF app first, then convert that smaller PDF here.
Will the EPUB validate?The generator creates required EPUB structure (mimetype, container, OPF, navigation). For strict checks, run the file through an EPUB validator.
Are there limits on file size or page count?Limits depend on your browser and device memory. Very large or image-heavy PDFs may exhaust memory; split the PDF or lower image dimensions and quality.
Can this convert protected or password-locked PDFs?Encrypted or rights-managed PDFs generally cannot be converted unless you unlock them with proper authorization.
Does this work offline?Yes. After the page loads once, you can convert without a network connection. Downloads are saved locally by your browser.
Troubleshooting conversion issuesReload the page to reset memory; try the other output style; lower image scale or width; ensure the PDF isn’t encrypted; test with a smaller sample; if only one file fails, re-export it from your PDF tool
Reflowable EPUB — advanced text shaping options explained
  • Keep images — include images from the PDF in reflow output; turn off for smaller EPUBs
  • Break at paragraphs — end paragraphs based on PDF flow; switch off if you see too many short blocks
  • Detect styles (bold/underline) — infer inline styling and tag spans; can add markup and slow very long PDFs
  • Preserve ligatures — keep fi/fl; switch off to normalize to fi/fl for better search
  • Preserve whitespace — keep multiple spaces and line breaks; good for code/poetry; avoid for normal prose if spacing looks odd
  • Don’t add spaces in gaps — prevents auto-spaces between tightly placed glyphs; may cause words to run together in some files
  • Preserve text spans — retain fine-grained font runs; increases HTML size but keeps local emphasis
  • More accurate text boxes — higher-precision bounding boxes; better layout detection at cost of speed
  • Attempt page segmentation — detect columns/regions for natural reading order; great for two-column papers; may misorder in tricky layouts
  • Hunt for tables — heuristics for tables; helpful for data PDFs; may mis-detect in complex designs
  • De-hyphenation (Smart/Always/Off) — Smart removes end-of-line hyphens only; Always removes all hyphens in words; Off keeps original hyphens
Advanced shaping — recommended presets
  • Novels/reports — Break at paragraphs: on; Detect styles: on; Preserve whitespace: off; De-hyphenation: Smart; Keep images: on
  • Two-column papers — Break at paragraphs: on; Page segmentation: on; Accurate boxes: on; De-hyphenation: Smart; Table hunt: on (if needed)
  • Code/poetry — Preserve whitespace: on; Don’t add spaces: off; Detect styles: off (unless needed)
  • Magazines/brochures — Prefer Image pages; if reflowing, Detect styles: on; Preserve spans: off to reduce markup
Advanced shaping — when to turn options off
  • Weird spacing or run-together words — turn off Don’t add spaces in gaps; keep Preserve whitespace off for normal prose
  • Heavy HTML or slow conversion — turn off Preserve text spans and Detect styles; leave Accurate text boxes off unless needed
  • Wrong reading order — toggle Page segmentation; some files work better with it off
Advanced shaping — performance and size tips
  • Most expensive options — Accurate text boxes, Page segmentation, Table hunt, Detect styles (on very long PDFs)
  • Markup size — Preserve text spans and Detect styles increase XHTML size; turn off to shrink output
  • Fast baseline — Break at paragraphs: on; De-hyphenation: Smart; others off unless needed
Advanced shaping — how it interacts with other settings
  • Page breaks vs continuous flow — if you see many tiny paragraphs, try Continuous flow + De-hyphenation: Smart
  • Document CSS vs Custom CSS — if source styles look awkward, set Document CSS to strip and add Custom CSS (use em/% units)
  • Keep images + Reflow — images scale with text; if the book is mostly images, consider Image pages instead