If you've ever felt locked into the Kindle ecosystem, you know the frustration. MOBI files don't work on most e-readers, tablets, or computers outside of Amazon's world. CheersPDF changes that. Drop your MOBI or PRC file right here, and we'll turn it into a clean, universally readable PDF — all inside your browser, with zero uploads and zero compromises on privacy.
Drag and drop your MOBI or PRC file here
or click to browse — accepts .mobi and .prc files up to 100 MB
A simple, private process that keeps your books on your device.
Pick any .mobi or .prc file from your device. These are the formats used by Amazon Kindle for ebooks. You can drag and drop or use the file picker — whichever feels easier.
CheersPDF decompresses the MOBI file and extracts the text content, chapter structure, and metadata — all inside your browser. We use Web Workers to handle the heavy lifting so your screen stays responsive throughout the process.
Once the conversion is done, your PDF downloads automatically. It's formatted with clear paragraphs, chapter breaks, and page numbers — ready to read, print, or share with anyone.
Built by readers who wanted a better, more private way to manage their book collections.
Amazon's MOBI format only works well within the Kindle ecosystem. By converting to PDF, you make your books readable on any device — from iPads and Android tablets to desktop computers and even older e-readers that only support PDF.
Your personal library is exactly that — personal. CheersPDF processes your MOBI files entirely in your browser. No file ever touches a server. No one at CheersPDF or Affor Technologies can see or access your books.
PRC is an older Mobipocket format variant that predates the modern MOBI standard. Many legacy Kindle books use the .prc extension. CheersPDF handles both formats seamlessly — just drop your file and we'll take care of the rest.
Our converter extracts text content with proper paragraph spacing, chapter separations, and formatting. The output PDF is designed to be easy on the eyes — whether you're reading on screen or printing it out.
You don't need to download Calibre, install a browser extension, or sign up for anything. CheersPDF runs directly in your web browser. Open the page, drop your file, and you're done.
There are no premium plans, no daily conversion limits, and no watermarks on your output files. CheersPDF is and will remain completely free to use.
The MOBI format was originally developed by a French company called Mobipocket, which was later acquired by Amazon in 2005. When Amazon launched the first Kindle e-reader in 2007, they adopted the Mobipocket format as the foundation for their ebook ecosystem — creating the .mobi and .prc file formats that millions of Kindle readers use today.
While MOBI served its purpose well for over a decade, it was designed primarily for the Kindle. Unlike EPUB — an open standard supported by virtually every non-Amazon e-reader — MOBI files are difficult to open outside of Amazon's apps and devices. This means that if you own a Kobo, a Nook, or simply want to read on your computer without the Kindle app, MOBI files become a roadblock.
Amazon has since moved toward newer formats like AZW3 (KF8) for their more recent ebooks, but millions of older Kindle books and personal documents still exist in MOBI and PRC formats. For many readers, converting these files to PDF is the simplest way to make them universally accessible.
MOBI is the older format with limited support for modern formatting features. AZW3, also known as Kindle Format 8 (KF8), is Amazon's newer format that supports HTML5, CSS3, embedded fonts, and more advanced layouts. CheersPDF currently supports MOBI and PRC conversion. AZW3 support is on our roadmap for future updates.
Both PDF and EPUB are excellent output formats, but they serve different needs. PDF gives you a fixed layout — every page looks exactly the same regardless of the device. This makes it ideal for printing, for sharing with people who may not have an ebook reader, and for archiving. If you want a reflowable ebook format instead, try our PDF to EPUB converter.
A MOBI file is an ebook format primarily used by Amazon Kindle devices and apps. It was originally created by the Mobipocket company and later adopted by Amazon when they launched the Kindle platform. MOBI files typically contain the full text of a book along with metadata like the title, author, and cover image. While they work great within Amazon's ecosystem, they're not widely compatible with other e-readers or devices.
Yes. PRC is an older variant of the Mobipocket format that's essentially the same under the hood as MOBI. Many early Kindle books and personal documents use the .prc extension. CheersPDF handles both .mobi and .prc files — just select either type and the converter will process it the same way.
It depends. If the book is protected with DRM (which most Kindle Store purchases are), then no — DRM-protected files cannot be converted by CheersPDF or any other legitimate tool. However, some publishers sell DRM-free ebooks, and personal documents you've sent to your Kindle via email are typically DRM-free and can be converted without issues.
Absolutely. CheersPDF processes everything locally in your browser. Your MOBI file is never uploaded to any server, never stored anywhere online, and never transmitted over the internet. The conversion uses JavaScript and Web Workers running in your browser's sandboxed environment — the same technology that keeps your online banking secure.
Yes, we're actively working on adding support for AZW3 (Kindle Format 8), which is Amazon's current ebook format. AZW3 is more complex than MOBI as it supports advanced HTML5 and CSS3 features, but we're building the tools to handle it properly. Stay tuned for future updates.
All of our conversion tools are free, private, and run entirely in your browser.