Step 1: Share your EPUB files using the button above or by drag and drop.
Step 2: Click the 'Transform' button to start the transformation.
Step 3: Grab your converted Kindle files.
EPUB to Kindle Transformation FAQ
How do I convert an EPUB file to Kindle?
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Upload your EPUB file using the picker above and the converter detects the source type and runs the EPUB → Kindle pipeline. The result downloads automatically when conversion completes; no account needed for one-off conversions. EPUB is the open ebook standard from the International Digital Publishing Forum, now maintained by the W3C. Kindle here means Amazon’s ebook family — the AZW3 and MOBI formats its devices and apps read.
Will the converted book keep its cover, chapters and table of contents?
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Yes where both formats can express them. Cover art, chapter divisions and a navigable table of contents are structural metadata, so they carry across rather than being flattened into the text. Footnotes and index entries are the fragile parts — they degrade into inline text on targets with no anchor mechanism.
Why does my EPUB file refuse to convert?
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DRM, in almost every case. A protected EPUB is encrypted and tied to an account, and no converter can decrypt it — ours included. Files you created yourself, or bought from a DRM-free store, convert without any trouble at all. EPUB has no fixed pagination, so page numbers are meaningless, and complex layout — tables, equations, multi-column — degrades badly.
Is the EPUB to Kindle converter free?
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Yes — basic EPUB → Kindle conversion is free with no registration required. Premium adds higher per-file size limits, more parallel batch workers, longer retention, and removes ads.
How big an EPUB file can I convert to Kindle?
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Free accounts: up to 100 MB per EPUB file. Premium: typically 1 GB per file depending on the source type. Very large files are split into chunks server-side when the Kindle format allows.
Will conversion change the content of my EPUB?
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Conversion preserves all information that both EPUB and Kindle can represent. Format-specific features the Kindle cannot represent (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — the result page lists what changed. An EPUB is a ZIP archive of XHTML and CSS with a manifest — essentially a small website packaged as a book. Output targets Amazon’s container with HTML-based content inside, so text reflows the way a Kindle expects.
Can I convert many EPUB files to Kindle at once?
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Yes — drop multiple EPUB files into the upload zone and they are queued in parallel. Premium runs more parallel workers; on a 50-file batch this is the difference between minutes and seconds.
Does the EPUB to Kindle converter work on phones and tablets?
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Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end.
Which browsers does the converter support?
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Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses standard `<input type="file">` upload — no WebAssembly or PWA dependency — so even older browsers work to upload an EPUB and download the Kindle.
Are my EPUB files kept private?
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Yes — uploaded EPUB files are processed in isolated workers and deleted within minutes. We never view, retain, or share content. The retention window is at /privacy/. EPUB reflows text to any screen size and any font size, which is what makes it readable on a phone as well as an e-reader.
What if the Kindle download does not start automatically?
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Disable any pop-up blocker, then click the download button manually. The result link stays active for 24 hours, so if your network drops mid-download you can retry from the result page without re-uploading the EPUB.
How long does EPUB to Kindle conversion take?
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Typically seconds for small files, a minute or two for files near the size cap. The server-side pipeline runs on dedicated workers — your laptop CPU is not the bottleneck and a slow phone uploads at exactly the same conversion speed as a fast desktop. A Kindle-format file side-loads onto any Kindle device or app and keeps working with Whispersync position tracking. The Kindle formats are proprietary and DRM-capable; a protected purchase cannot be converted at all.
