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File format  

Format File format name Programs that use this format  Author
doc Microsoft Word Binary File Format Microsoft Word (97-2010)
Apple Pages
Microsoft Word
IBM Lotus Symphony
docx Microsoft Word Open XML Document  Microsoft Word 2013
Corel WordPerfect X7
Apple Pages 5.2
MobiSystems OfficeSuite Pro 7
Google Drive
pdf Portable Document Format Adobe Viewer
Acrobat Reader
Adobe Systems
pages Pages Document Pages 4.0
Pages 4.1
Pages 4.2
iWork '09
Google Docs
Apple Inc.
jpg Joint Photographic Experts Group JFIF format Adobe Photoshop
Adobe Suite
Apple Preview
Corel Paint Shop Pro
Microsoft Office
Microsoft Windows Photo Gallery Viewer
Most web browsers
Joint Photographic Experts Group 
 jpeg Joint Photographic Experts Group JFIF format Adobe Photoshop
Corel Paint Shop Pro
Apple Preview
Microsoft Windows Photo Gallery Viewer
The JPEG Committee
png Portable Network Graphics Microsoft Windows Photos
Microsoft Paint
Adobe Photoshop CC
PNG Development Group (donated to W3C)
csv Comma Separated Values File Microsoft Excel
Microsoft Works
Corel Quattro Pro
Apache OpenOffice
Microsoft Notepad
Libre Office
MobiSystems OfficeSuite Pro 7
 xlsx Microsoft Excel Open XML Spreadsheet Microsoft Excel 2007
Open Office
Oxygen Office Progessional (Linux)
numbers Numbers Spreadsheet File Apple Numbers (Mac, Web & iOS) Apple Inc.
ppt Microsoft PowerPoint Presentation File Apple Keynote
Microsoft PowerPoint
 pptx  Microsoft PowerPoint 2007 XML Presentation Apple Keynote
Microsoft PowerPoint
html Hypertext Markup Language with a client-side image map Internet Explorer
Mozilla Firefox
Google Chrome
Other internet browsers
World Wide Web Consortium & WHATWG
url Internet shortcut file Apple Safari
Google Chrome
Microsoft Internet Explorer
Microsoft Word
Mozilla Firefox
Show more

How to guide:

How to use the online PDF converter:

  1. Type in your web browser address bar.
  2. Within the app, select the operation you wish to perform with your PDF and choose the respective column (i.e. Manage PDF, Convert, or Office & PDF).
  3. Select the desired tool from the menu by clicking on it.
  4. When redirected to a new page, upload a file from your device or import it from Google Drive, Dropbox or OneDrive.
  5. Follow the prompts to process your file online.
  6. Choose what else you want to do with the resulting file. Download it back to your device or save it to your cloud storage service account.
  7. Edit your documents online using the web-based PDF editor.
  8. Share the resulting file via Email, Fax or SMS.

The Ultimate Features Comparison Chart

As a result of the high level of competition on the web, choosing the best application can be challenging — especially if you don’t correctly compare it with the alternate options. Our checklist will help you quickly find your favorite tool to work with PDF. Look at the strong features of AltoPDF.

Split PDF
Merge PDF
Combine & Reorder
Extract Pages
Compress PDF
Rotate PDF
No Software Downloads
Cloud storageUnlimitedNo infoNo info
PriceFreeFree 7-Day Trial for Smallpdf/ paidFree 7-Day Trial for Adobe Acrobat/ paid
Encryption and Security
Support24/7/365No info
No ads

Customer Reviews — Trusted by great people



Awesome converter! I can experiment with my documents using various options, combining them to get the file I need. No more trouble with unsuitable formats. I get the right one in a matter of seconds.



The best PDF converter I’ve ever come across! All-in-one solution! Extract, merge, split, convert to images and back… even e-signature is available. Everything’s on the table and for free.



I used to convert my PDF documents with other tools, but now that I found AltoPDF everything has become simpler. I can’t think of any drawbacks.

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How to Work with a PDF Online

You can find plenty of different types of paid software designed for working with PDF, but it's vital that you make the right choice. So we have collected the best free features for you in one place that are available for any device — desktop or mobile.

Upgrade Your Skills to View & Edit PDFs

Many contracts and documents are signed electronically and saved in PDF because the format tends to be more secure. However, this means that viewing and editing PDFs can become complicated. See the advanced features of our powerful web-based tool that can satisfy all your requirements:

  1. Split PDFs into separate docs or pages.
  2. Merge several docs into a single one.
  3. Rotate pages and select a horizontal or vertical position.
  4. Work across your storage clouds.
  5. View and edit docs on the go.
  6. Combined and reorder files. 
  7. Compress PDF papers for quick sharing and better storing.
  8. Manage your paperwork instantly and free.
  9. Delete or extract the pages you need
  10. Stay assured to keep your information protected.

All-in-one online service has the most common tools for working with portable document format. All of them are free, with no registration required. Drag-and-drop functions make the process even more comfortable. This powerful browser application allows you to view, organize, and process PDF docs and pages.

Upgrade Your Skills to View & Edit PDFs

Best Alternative to Convert from PDF

Make PDFs editable in a few clicks and for free. Simply drag and drop PDF files and transfer to a variety of popular file formats like spreadsheets, Word docs, presentations and more. 

Explore the benefit features for your convenience:

  1. Convert PDF to editable Microsoft Word doc.
  2. Save portable document format to Excel spreadsheets to use formulas and make reports.
  3. Transfer to PPT without losing formatting.
  4. Promptly change PDFs to images: JPG or PNG.
  5. Easily process docs and transform to HTML.
  6. Download results to your Google Drive, DropBox or OneDrive.
  7. Operate from your desktop or mobile device.
  8. Take advantage of secure data processing.

Converting PDF files is easy if you have the right tools for it. Alto PDF is a multi-purpose solution to help you anywhere and anytime. All you need is your preferable browser and an Internet connection.

Best Alternative to Convert from PDF

Only use a Safe Solution to Convert to PDF Online

PDF is known as a universal format to use and share on the Internet. For your convenience, you can effortlessly convert any document you have to PDF. 

Do this absolutely free of charge with AltoPDF and make use of advanced features:

  1. Save contract from Word to PDF for safe storing.
  2. Convert Excel pages and tables for better performance.
  3. Transfer the PowerPoint presentation to PDF keeping the formatting.
  4. Change multiple JPG and PNG images to a single doc to email fast.
  5. Easily save the Chrome HTML doc into the PDF file.
  6. Stay assured in a high level of data protection.
  7. Don’t stop editing — use our converter on your mobile device.
  8. Create portable document format documents from Web pages.
  9. Perform conversions regardless of an operating system.

Our free converter covers the needs of many people. No need to download or install anything. Work in your browser, upload and convert files quickly, instantly save, share or keep editing the newly created PDF.

Only use a Safe Solution to Convert to PDF Online

Easily Manage PDFs across your Apple Devices

Fill out forms, work with manuals and templates, and perform other important tasks without installing any special paid software on your Mac or other Apple devices like iPhone or iPad. 

AltoPDF converter works from your browser and undertakes conversion the exact way you need:

  1. Make use of instant PDF conversions that save time.
  2. Transfer Pages to Doc even on the go.
  3. Change Doc to Pages to redact it in the most convenient way.
  4. Operate it for free and with no registration.
  5. Save Numbers to XLS and share with Microsoft Office users.
  6. Convert XLS to Numbers to form reports and tables on Mac.
  7. Stay on a secured connection with AltoPDF.
  8. Explore additional innovative features. 

Our online platform is compatible equally well on iOS, Windows or Linux. Use it in your standard browser not only in the office or at home but from any place. Only an Internet connection is required.

Easily Manage PDFs across your Apple Devices

The Best way to Sign & Protect Your PDF

Nowadays, it is very important to keep up with everything, to save time on managing paperwork, to speed up the process of legal signing of documents and at the same time to remain protected. You can easily use your e-Signature to certify important PDF docs on the web while staying under security protection:

  1. Create your unique customized electronic signature.
  2. E-sign legal documents from any device.
  3. Put your legally valid signatures on contracts, tax forms, etc.
  4. Keep your sensitive data safe.
  5. Download a secured PDF to your cloud storage.
  6. Password protect your information.
  7. Remove the password from a secured doc, unlock PDFs online.
  8. Share docs with your teammates or email directly to the recipient.

Always use reliable programs to process PDF documents. Create your personal legally binding signature, sign docs electronically, protect them and share at ease with our advanced PDF editor online.

The Best way to Sign & Protect Your PDF

How to Find and Complete the Exact Form — Quick Search

The use of business, medical, and tax forms saves time and money on phone calls and trips to the office to simply pick up the paperwork. An additional advantage is that many PDF templates are fillable and digital. 

This means that you can work with your documents online:

  1. Use our federated search to get the best results.
  2. Find the appropriate document the fastest way. 
  3. The PDF editor will recognize the editable fields automatically.
  4. Type on the PDF forms and save changes.
  5. Edit templates and add fillable fields.
  6. Insert and adjust images, shapes, checkmarks.
  7. Fill in the professionally designed templates.
  8. Date and sign contracts and business forms.
  9. Complete tax returns and file them with the IRS
  10. Use multi-purpose tools online from any device.

Our browser-based AltoPDF service provides an advanced search for different kinds of documents, templates, samples. Fill out forms, work with guidelines and perform other essential duties without the need to install and pay for software.

How to Find and Complete the Exact Form — Quick Search


AltoPDF is a free online platform that allows manipulations with PDF files. One of its significant features is that you can import files from GoogleDrive and once they are processed, export them back. The service allows converting of Word, PPT, JPG and PNG files fast, free, safe, easy and retaining the quality of the original document.

Did you know?

Your PDF becomes an interactive form

Convert documents to PDF from the most popular formats and edit PDF with an extensive toolbar. Place fillable fields anywhere on a document and make it possible for other users to fill, sign, and submit your document. Insert dropdown menus, lists, checkbox fields, etc. Any field you create can be easily moved, resized or deleted. Import images, arrows, bookmarks and sticky notes.