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I tried it and immediately fell in love! It was so easy to use! After a couple conversions I bought the guys a cup of coffee. A couple more and decided this was too good to abuse! I joined! My life is so much easier!


I had a huge, problematic file to convert that couldn't go through the usual automated conversion process. The Zamzar team responded quickly to my request for help, and they took the extra steps needed to do it manually.


Used it for over a year to convert my bank statements to csv files. Great quick app, increased my productivity a lot. Also, amazing support - always helped me quickly!

Agata Wierzbicka

I've used this product for years. And customer service is excellent. Just had an issue where I was charged and I didn't agree with the charge and they took care of it, even though they didn't have to.


I have been so thankful for Zamzar’s support from the beginning of the Pandemic to the present day. Their service is first rate & their helpfulness is always the best it could be.


A very useful and professional site. The service is easy to use and the administrators are helpful and courteous.

David Shelton

I use Zamar whenever I need to convert audio and video files from multiple submitters to 1 uniform file format for Audio and Video Editing. I can do multiple large files in a short amount of time.

Christopher Bee

Great for when you need a lot of conversions in a short time. You have directly access and can even put the subscription on for just a month.

Sabina Calis

Great thanks to you all for helping me to get the OLD files converted correctly. 20 years, quite a long time, reviewing the files brings much memory to me. That's the best gift I received last year. Thank you all again.

Jiunn-Ru Lai

I feel like Zamzar is an active team member, especially for projects that I work on where I am the workhorse and it saves so much time and frustration. I am spoiled with Zamzar, because they have set the bar for file conversion and customer service very high.

Deborah Herman

Trusted by employees at these brands

Employees of some of the world’s most well-known brands rely on Zamzar to convert their files safely and efficiently, ensuring they have the formats they need for the job at hand. From global corporations and media companies, to respected educational establishments and newspaper publications, employees of these organisations trust Zamzar to provide the accurate and reliable conversion service they need.

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Your files are in safe hands

Zamzar has converted over 510 million files since 2006

For every 10,000 files converted on Zamzar, we'll plant a tree. By using Zamzar you are helping to make a difference to our planet

We're committed to regular charitable giving. Each month we donate at least 2% of our company profits to different charities

From your personal desktop to your business files, we've got you covered

We offer a range of tools, to help you convert your files in the most convenient way for you. As well as our online file conversion service, we also offer a desktop app for file conversions straight from your desktop, and an API for automated file conversions for developers. Which tool you use is up to you!

Want to convert files straight from your desktop?

Get the App

Fully integrated into your desktop

Convert over 150 different file formats

Convert documents, videos, audio files in one click

Need conversion functionality within your application?

Explore the API

One simple API to convert files

100s of formats for you to choose from

Documents, videos, audios, images & more...

Why choose Zamzar?

With Zamzar, file conversions are easy, reliable and convenient, so you can quickly convert your documents, images, videos, and more, to the formats you need. With faster downloads of converted files, and friendly and helpful support when you need it, you’ll have everything you need to work with your files.

Zamzar is a cloud-based conversion tool, which means you can convert your file from anywhere, providing you have a working internet connection!

Cloud Based

Zamzar is a cloud-based conversion tool, which means you can convert your file from anywhere, providing you have a working internet connection!


Fast Downloads

We've recently developed real-time conversions, which means you never have to leave our site to convert and download your file.

We’re always innovating, which has led to us releasing a new desktop app, real-time file conversions, and many more file-conversion types.


We’re always innovating, which has led to us releasing a new desktop app, real-time file conversions, and many more file-conversion types.

You can convert files at any time, as the site is available each and every day of the year.

Available 24*7

You can convert files at any time, as the site is available each and every day of the year.

Tools to suit your file conversion and file compression needs

You’ll find all the conversion and compression tools you need, all in one place, at Zamzar. With over 1100 file-conversion types supported, whether you need to convert videos, audio, documents or images, you’ll easily find what you need and soon have your files in the formats and sizing that work for you.

PDF Document Format

PDF Converter

The PDF format, or Portable Document Format file, was developed by Adobe Systems. PDF files are popular because they can be easily viewed and edited in a variety of computing platforms. Word documents can easily be exported or converted to PDF, and both presentations and images are also often saved out as a PDF file. Typically, PDF files are not created from scratch, but rather existing file types are converted into PDF format to allow the file to be easily shared and accessed.

PDF files normally look exactly like the original file, with fonts, colours and images all preserved. They can also be annotated and can be opened by almost any device and by any modern web browser. PDF files can be edited using Adobe Acrobat PDF software, which was developed almost 30 years ago and is available on Windows and MacOS.

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MOBI eBook Format

MOBI Converter

A MOBI file has a full name of Mobipocket e-book and is an e-book file format that has been developed by Amazon and are the basis of the file formats used by all Amazon Kindle devices. A MOBI file differs from the other popular e-book format, epub, in that it is protected by Digital Rights Management which essentially pins the book down to just the one device so it can’t be used if not registered to the users account.

MOBI file formats have provided the basis of the recently created KF8 file format which are used in the most recent Kindle formats. As e-books and e-readers become more popular, the MOBI format’s use has largely fallen away but it is still the base on which many of the more modern e-book formats are based including AZW and AZW1.

Programs that can open a MOBI file format include the Kindle and and the tool Calibre.

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How to convert a PDF to a MOBI file?

  1. 1. Choose the PDF file that you want to convert.
  2. 2. Select MOBI as the the format you want to convert your PDF file to.
  3. 3. Click "Convert" to convert your PDF file.

Frequently asked questions

If you’ve got any questions about converting or compressing files with Zamzar, we’re happy to help! We’ve answered a few commonly-asked questions below, to get you started, and you can find out more information about file conversion and compression with Zamzar, in our Help centre.

Using Zamzar’s online conversion tool you can easily convert a PDF to a MOBI file. Simply, upload your file, select ‘MOBI’ as your ‘Convert To’ option, then confirm your conversion. You can download your file from the same page or have a download link to the converted file emailed to you. You can also use other conversion software such as Calibre, a free ebook software you can download to your computer.

You can convert your file to MOBI using specialist downloaded ebook software, such as Calibre or Epubor Ultimate. You could also use an online conversion tool like the one on Zamzar’s website. Zamzar’s easy-to-use three-step tool walks you through exactly how to convert your file quickly and efficiently, it’s free to use, and you can download your file from the same page. Using Zamzar also saves you having to install any extra software on your computer.

The Kindle app supports file uploads for MOBI, HTML, RTF, TXT, PDF and DOC. If you’re struggling to upload your PDF file, you can convert a PDF to another Kindle format using a conversion tool. There are various tools available online, including Zamzar’s free three-step converter tool, which converts files in real time. Alternatively, you could convert your PDF file using specialist ebook software, such as Calibre, but you’d need to install this software on your device first.

There are many tools available for converting PDF to MOBI, including online conversion tools like Zamzar, and downloadable ebook software like Calibre or Epubor Ultimate. Zamzar has been successfully converting files since 2006, and we’re known for the convenience and speed of our conversions, as well as our customer support - making us a sure bet for converting your PDF to MOBI safely and efficiently.

You can convert a PDF to a book using a conversion tool. Conversion tools enable you to convert a file from one format to another, usually within a few easy steps. Zamzar has a conversion tool that’s available online without downloading specialist software, and that’s simple to use, fast and free! Simply upload your PDF file in step 1, select your ebook format in step 2, and click to convert your file. You can then download your new ebook to your computer. Other options for converting a PDF to an ebook format are Calibre and Epubor Ultimate - both ebook softwares you can install on your device.

You can convert a PDF to a MOBI file in Windows using Windows-specific apps (such as AnywaySoft’s PDF Converter) or using an online conversion tool such as Zamzar. Using an online conversion tool can be an easier solution as you don’t need to search for or download software, and it doesn’t take up any extra room on your PC. Zamzar’s converter has a simple browser interface that is quick and easy to use on any device.

You can convert your book to MOBI using specialist ebook software such as Calibre, or opt for an online conversion tool such as Zamzar. Online conversion tools can be the simplest option to use: free, fast, and available through your browser page with no software downloads needed. Using Zamzar’s converter, easily upload your book file, select ‘MOBI’ as your ‘Convert To’ option, and press ‘Convert Now’ to begin the conversion process. Download your file from the same page once complete or tick the box to have a download link emailed to you.