Are my files uploaded to a server?

No. All processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device.

What about scanned PDFs?

Scanned PDFs (image-only) without OCR text layers will produce limited or no text extraction. For best results, apply OCR to your PDF before converting.

Does the output work with Kindle?

EPUB files can be sent directly to newer Kindle devices via the Send to Kindle feature, or emailed to your Kindle address. Older Kindles may need a MOBI/KFX conversion through Amazon's service.

What is the difference between EPUB2 and EPUB3?

EPUB3 is the modern standard supporting HTML5 and CSS3, including audio, video, and better accessibility. EPUB2 is a legacy format for older readers. We recommend EPUB3 for all new conversions.

What is the maximum file size I can convert?

Since all processing happens in your browser, the limit depends on your device's available memory. Most devices handle files up to 100 MB without issues. Very large files may be slower on older devices.

Can I convert password-protected or DRM files?

No. DRM-protected files and password-locked PDFs cannot be converted. You must have the legal right and unrestricted access to convert any file.

Is the converter free to use?

Yes. EPUB Converter is completely free with no file limits, no watermarks, and no sign-up required.

Which browsers are supported?

All modern browsers including Chrome, Firefox, Safari, and Edge. We recommend using the latest version for best performance and compatibility.

Can I convert multiple files at once?

Currently the tool converts one file at a time. Select a new file after each conversion to process additional documents.

How do I add a cover image to my EPUB?

You can upload a JPG or PNG cover image in step 2 of the conversion form. For PDFs, the converter can also auto-detect a full-page cover image on page 1.

EPUB Converter

Convert Markdown to EPUB

Convert Markdown to EPUB locally in your browser. No uploads, no tracking, no server processing.

Great for notes and documentation.

Local conversionNo uploads

Loading converter…

Optional settings

Your files stay on your device. No uploads, no server processing.

Markdown → EPUB

Markdown is inherently well-structured, making it one of the cleanest source formats for EPUB conversion. Headings become chapters, code blocks are preserved with monospace styling, links remain clickable, and images are embedded automatically. The converter handles GitHub Flavored Markdown features like tables, task lists, and fenced code blocks. This is ideal for technical writers, developers, and anyone who writes in plain text.

Tips

Use ATX-style headings (# Heading) for reliable chapter detection.
Reference images with relative paths or data URIs for offline EPUB.
Add YAML front matter for title and author metadata if your editor supports it.
Use horizontal rules (---) to indicate thematic breaks between sections.

Use cases

Technical documentation, developer notes, READMEs, tutorials, personal knowledge bases, and any Markdown content you want as a portable ebook.

Supported conversions

PDF → EPUB
Best for text-based PDFs. Scanned PDFs without OCR may be limited.
DOCX → EPUB
Preserves headings and basic formatting.
Markdown → EPUB
Great for notes and documentation.
TXT → EPUB
Clean text conversion with optional heuristics.
HTML → EPUB
Sanitized HTML to EPUB.

Convert to EPUB

Frequently asked questions

Are my files uploaded to a server?: No. All processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device.
What about scanned PDFs?: Scanned PDFs (image-only) without OCR text layers will produce limited or no text extraction. For best results, apply OCR to your PDF before converting.
Does the output work with Kindle?: EPUB files can be sent directly to newer Kindle devices via the Send to Kindle feature, or emailed to your Kindle address. Older Kindles may need a MOBI/KFX conversion through Amazon's service.
What is the difference between EPUB2 and EPUB3?: EPUB3 is the modern standard supporting HTML5 and CSS3, including audio, video, and better accessibility. EPUB2 is a legacy format for older readers. We recommend EPUB3 for all new conversions.
What is the maximum file size I can convert?: Since all processing happens in your browser, the limit depends on your device's available memory. Most devices handle files up to 100 MB without issues. Very large files may be slower on older devices.
Can I convert password-protected or DRM files?: No. DRM-protected files and password-locked PDFs cannot be converted. You must have the legal right and unrestricted access to convert any file.
Is the converter free to use?: Yes. EPUB Converter is completely free with no file limits, no watermarks, and no sign-up required.
Which browsers are supported?: All modern browsers including Chrome, Firefox, Safari, and Edge. We recommend using the latest version for best performance and compatibility.
Can I convert multiple files at once?: Currently the tool converts one file at a time. Select a new file after each conversion to process additional documents.
How do I add a cover image to my EPUB?: You can upload a JPG or PNG cover image in step 2 of the conversion form. For PDFs, the converter can also auto-detect a full-page cover image on page 1.