Edit and Sign PDF Documents in a Snap

Convert, split, merge, edit and sign your PDF documents online without registration.

How to use AltoPDF

AltoPDF is a multifunctional PDF solution that makes managing files easier. Since this is a user-friendly service, you can easily convert PDF in a few clicks.

All you need is just to drag and drop a necessary PDF into a box or to browse a device for a file. In the menu choose a required feature and handle a document.

Convert PDF online

AltoPDF is a streamlined free pdf converter that allows you to convert files both from and to PDF format. Convert PDF files into a large number of other document formats such as Word, presentations and images.

Take an advantage of converting files to PDF from PowerPoint, Word, PNG and JPG formats.

Edit PDF online

AltoPDF editor offers a host of functionalities for manipulating PDF files. This service provides its users with an extensive toolkit and allows rotating pages in a document as well as merging files. We are planning to present you more functionalities such as splitting files and ability to reduce their size in order to make document managing process easier.


This is one of the most powerful features that are provided by AltoPDF. Users can be sure that all uploaded files will be deleted in 24 hours automatically.

Your documents will be secured and no one else will have access to them. You also will be able to protect files with our free service as well as to unlock the password-protected PDF documents.

Supported File Formats

AltoPDF supports multiple formats that help to meet your requirement. For instance, when dealing with documents, such formats as PDF and Microsoft Word are available. This service also supports such image formats as JPG, PNG as well as presentation format - PPT. We are going to enable your user experience and streamline the number of formats available such as TIFF, TXT, RTF and ePub.

Manipulating Documents on the Go

Since such a powerful service does not require any download or software installation, you may easily manage your PDFs on the go using any device. AltoPDF is a cross-platform service that can be easily operated on Windows, Mac or Linux. Whether you need to convert or to edit your files, you may do it effortlessly from a tablet or smartphone just using your browser.


File extension .pdf
Internet media type application/pdf
Description: PDF stands for Portable Document Format. It is a versatile file format and extension developed in 1993 to simplify the procedure of viewing and printing documents and sharing them between users working on various platforms and operating systems. Another useful feature of PDF is that it combines features of both a text document and a vector graphic image. Each page of a PDF document has a fixed layout and retains its structure whenever it is copied or downloaded to another device.
Technical Details: PDF is a 7-bit ASCII file that contains the complete description of a flat vector document with fixed formatting. All the fonts used are stored within the file. These two features allow users to forget about missing fonts, misplaced elements, distorted graphics, etc. Along with text blocks and graphic images, PDF file may include fillable fields and interactive elements such as buttons, hyperlinks, bookmarks, embedded media, etc.
Developed by ISO
Initial Release: 15 June 1993
Useful links: https://whatis.techtarget.com/definition/Portable-Document-Format-PDF


Customer Questions and Answers

I’m almost out of storage space on my hard drive. Is there any convenient online tool I could use to edit PDFs that doesn’t require installation? Thanks!
There is one web tool I know that suits your requirements. You can upload your PDFs to AltoPDF.com and edit them online. All you need is a stable internet connection! No downloads required!
By Carl on May 16, 2018
Is there a possibility to edit and format PDF files for free? If so, where can I find this program?
Here’s a tip. Simply go to altopdf.com and find everything you need in one place. It is a fully functional free online platform with multiple built-in features you can use without leaving your browser.
By Pedro on April 09, 2018
Is there a cheap program out there that can help me edit PDF files?
In case you need to change your PDF documents in a quick and cheap way - access the AltoPDF platform. It helps you to convert, merge, split and rotate your PDF files as well as edit them using various tools.
By Joshua on March 18, 2018
See All Question

How to Edit PDF Files

Converting a Word, Excel, or PowerPoint file into a protected PDF

Encountering troubles with email inboxes, hacked databases or stolen private account information isn’t uncommon. Users of cloud storage services pose have a right to be concerned over the safety of their account information. Another valid concern has to do with the measures that should be taken in order to protect a user’s most sensitive information.

The PDF document has been designed to present and exchange files reliably, independent of software, hardware and operating system. As opposed to other formats, PDF preserves the original look of the document while enabling file sharing. Whether you print or view it, the PDF will always look the same. That’s why it is so widely used by businesses, agencies and organizations that prefer commercial printing methods. But how can a user quickly extract needed information if it is contained in another document format? Use a PDF converter.

Now you can edit PDF documents from such popular formats as Word, Excel or PowerPoint. Use powerful online tools to avoid annoying downloads and installations. Easily convert pdf to powerpoint, convert Word to PDF and other formats. If you want to place data from a PDF document into a spreadsheet, use an online pdf converter to excel.

Experience the benefits of a pdf to word document conversion:

  • Simply upload your files by dragging and dropping them into the box on the screen and rearrange your files in whatever order you prefer.
  • There is no need to make any payments or purchase any additional software.
  • Take advantage of encrypted file transfer. Everything that you process is highly protected. Encrypted connections provide secure transmission of your information. All data is deleted after downloading your converted document.
  • No matter whether you prefer Linux, MacOS or Windows, you can make changes in any browser with any internet-connected device. Finally, converting files in the cloud doesn’t consume storage on your computer. Use the application wherever you need.
  • How to Convert Scanned Documents/Images to PDF

    Converting scanned documents and images into PDF format can be done via highly protected means. Protect your documents with two-factor authentication in your Encrypted folder. To activate the Encrypted folder follow the steps below:

    1. Click the protected folder in your MYBOX and enter your cell phone number. You will immediately receive an activation code via text message.
    2. Enter the activation code and click Verify to create a password.
    3. Create and confirm your password to open the folder.
    4. To add documents to the Encrypted folder, drag them from any other folder.
    5. Once you’ve finished working with your protected documents, close the Encrypted folder by clicking the key icon. It will also automatically lock after 10 minutes of inactivity.

    To access documents in the Encrypted folder, you will have to enter your password again.