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File extension.pdf
Internet media typeapplication/pdf
Description:PDF or Portable Document Format is one of the most famed and preferred file formats to store and share knowledge. It has taken the place of the paper-based documentation process entirely. But, a concern for the authenticity of PDF files rose when there was no validation or signature attached to the PDF. This is why Adobe Reader and Acrobat started using digital signatures. Digital signature in PDF can be used just as the traditional pen-ink signatures are used in paper-based documents.
Technical Details:PDF digital signatures are mainly used to check the integrity of the document and authenticate the author’s identity. The concept was introduced firstly as PDF 1.3 and is a part of the ISO 19005-1 standards. Each pdf electronic signature is associated with a signature handler and is placed in a PDF e signature dictionary.
Developed byISO
Initial Release:15 June 1993
Useful links:



How to Insert Signature in PDF Online?

Follow these steps to sign a PDF:

  1. Open the official website of CocoSignPDFFree in any of your browsers.
  2. Click on “Choose Files” to upload the targeted PDF store in your device or on cloud storage space.
  3. After the PDF is uploaded, choose “Sign”.
  4. Type your full name or use the mouse or trackpad to draw your signature.
  5. You can also upload the signature image from your device
  6. After that, you can save the document to your computer, phone, or the cloud.

Standing Out In Every Feature Comparison

Indeed, CocoSign is not the only tool that allows you to sign on PDF online. But, the way it has streamlined the process and ensures that accuracy is not compromised is commendable. There is hardly any online tool rendering such kind of quick and reliable assistance. Here is a detailed feature comparison chart proving that.

CocoPdf Smallpdf Adobe
View & Edit
Split PDF
Merge PDF
Combine & Reorder--
Extract Pages--
Compress PDF-
Rotate PDF-
Convert from PDF
PDF to Word
PDF to Excel
PDF to PNG--
Convert to PDF
Word to PDF
Excel to PDF
PNG to PDF--
Web to PDF--
Mac PDF converter
Pages to Doc--
Doc to Pages--
Numbers to XLS--
XLS to Numbers--
Sign & secure
eSign PDF
Protect PDF-
Password PDF--
Unlock PDF-
Share PDF-
iOS and Android Apps
Chrome Web Store - Extensions-
No software downloads-
Cloud storageUnlimitedNo infoNo info
PriceFreeFree 7-Day Trial paidFree 7-Day Trial paid
Encryption and security
Support24/7/365No info
No ads

“ CocoSignPDFFree has made PDF signing easier than ever before. It doesn’t keep you engaged in a survey or ask to fill a questionnaire to use its free service. It’s quick, simple, and reliable. It’s now my first choice. ”


“ If you want to save bucks while enjoying the world’s most advanced online PDF sign facility then nothing can beat CocoSignPDFFree. It has made the task utterly easy and flawless. A single click and work are done. Don’t think much; just go for it. ”


“ With CocoPDF, I was able to do bulk signing without witnessing a single error. It’s 100% reliable. Before using this, I never knew how to do e signature on PDF this easily. Great service! ”


How to Add Signature to PDF?

Use CocoSignPDFFree to create a signature for PDF without getting involved in the tedious set-up and downloading. Only an active internet connection is required. Save time and time while getting bulk PDF files signed.

Using Google Chrome
With Preview on Mac
With Adobe Acrobat Reader
How to Add Signature to PDF Online?

A signed PDF doesn’t need any other verification means. While doing so, by other means, can be tedious and daunting, CocoSignPDFFree helps you accomplish this task in a fraction of a second. This tool can work from any device and any browser as long as you have an active internet connection.

CocoSignPDFFree stands peerlessly when it comes to accuracy. The sign would be crystal clear and gives the impression as if it’s done by hand. Here are the steps that one needs to follow to sign a PDF on the CocoSignPDFFree website.

  • 01Upload the document on the website either by dragging or dropping files.
  • 02Wait for the file to get uploaded. Add electronic signature to PDF once it’s done.
  • 03 Design your signature by adding initials or pictures
  • 04 Place the cell that has the final signature at the desired location.
  • 05 Submit the final document and download the file.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF Using Google Chrome?

If you’re using Google Chrome as your default internet browser then adding e-signs to your PDF is easy as CocoSignPDFFree offers a Chrome-compatible extension. The extension will help you to create a digitally secure and sound e-sign for your PDF without any software download and set-up.

Within a few seconds, you’ll have your personal e-sign generator tool without any sign-up and payments. It will integrate with Google Chrome flawlessly and will serve your service over a single click. There is no other quicker and easier way to sign a PDF than this. Here are the steps that you need to follow to get hold of it.

  • 01Visit the Chrome Web Store, search for CocoSignPDFFree, and install the extension.
  • 02Open the extension, upload the targeted PDF, and add a signature to a PDF that you have chosen.
  • 03Submit the final file and download it for further use.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF from Windows?

Windows is one browser that lacks some of the features and demands an app download and set-up to sign a PDF. This is especially true for Windows 10 users. It doesn’t offer an extension or work online when PDF digital signing is concerned. So, no matter how much you search for ‘how to add an electronic signature to PDF’, you will always return empty-handed.

There are many apps available in the Windows app store that can help you with the job. You can choose any kind of trustworthy solution to sign your document.

  • 01Download the solution and open it.
  • 02Upload your PDF.
  • 03Create your certification.
  • 04Add your signature in the corresponding area of the page.
  • 05Save the final document.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF on Mac?

If you’re the Mac users who want to digitally sign PDFs without any fuss and for free then you must think of using Preview. The PDF electronic signature option is invisible in the standard menu. So, you need to hunt it down. Just click on the pen symbol present on the upper tools panel. Below mentioned are the steps that you should follow to use this tool to create a PDF signature.

  • 01Open the targeted PDF in the Preview app.
  • 02Open the Toolbox option and select the Signature icon.
  • 03Draw the signature on the touchpad.
  • 04Place the signature at the desired place in PDF.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF via Adobe Acrobat Reader?

Adobe Reader DC is one of the most renowned tools to add digital signature on PDF. This software will help you solve all the queries on how to add a signature in PDF or document. It can be used on Windows, Mac computers, and mobile devices.

After a free sign-up, the user is eligible to use the free trial version for a week. Follow these steps to sign a PDF with Adobe Acrobat.

  • 01Open Acrobat DC, and upload the PDF file that needs to be signed.
  • 02Click on the “Sign” option present on the upper right-hand section of the toolbar.
  • 03A pop-up window will appear to select it and specify the needed cell.
  • 04Click on the sign icon and select either to add a signature to a PDF or add initials.
  • 05Add initials by drawing, typing, or adding a photo of them.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF with the Phone?

To digitally sign PDF on your phone, use CocoSignPDFFree as it's highly scalable on a solution. This solution is at your service within a fraction of a second. Before trying it, you must know that CocoSignPDFFree doesn’t save any of your PDF or digital sign details on the server. Hence, your information is in safe hands. The steps of using CocoSignPDFFree on a phone are mentioned below.

  • 01Open any of the default browsers on your mobile phone and search for the CocoSignPDFFree tool.
  • 02Open the official website and click on the “Upload File” option
  • 03Add the file and click on the “Add Signature” option.
  • 04 Draw or add your signature and choose “Save and Use”.
  • 05Drag and drop the final signature at the desired location in PDF.
  • 06 Click on “Download” and save the final document.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF on iPhone?

No registration, set-up, and sign-up is required to avail of the reliable and technologically advanced PDF signing facility of CocoPDF. The app is available in the iOS App Store. The process is fast enough to sign bulk documents within a minute.

Follow the steps given below to sign PDF:

  • 01Download and install the CocoPDF iOS application from the app store for free.
  • 02 Complete the app installation process and choose the “Sign PDF” option.
  • 03Upload the desired PDF file.
  • 04Select “Add Signature” and draw your digital signature.
  • 05Place the final signature at the right place in the PDF.
  • 06Click on “Done” and download the final file.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Add Signature to PDF on Android?

If you search ‘how to add an electronic signature to PDF’ on Google, you will get ample of Android PDF sign apps, each claiming to be the best one. But, hardly anyone is of good use. To add an electronic signature to a PDF without zero hassles and rustle, you must use the Android app CocoPDF. Here the steps that will help you get an electronic signature PDF easily.

  • 01Download the CocoPDF app from Google Play Store and finish the set-up process.
  • 02Upload the PDF file that needs a PDF e signature.
  • 03Create a signature and place it at the corresponding position.
  • 04Download the final document.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG

PDF eSignature FAQs

How can I add an electronic signature to a PDF for free?

Adding a signature to a PDF is easier than anything else if you’re taking the help of CocoSignPDFFree. It’s an online tool that allows you to add clear and accurate digital signs into the PDF of your choice. Just visit the website, drop the PDF here, the select signature type, and your signs would be added on PDF.

How do I create an electronic signature?

To add a sign in any PDF for free, the only viable and doable way is to use CocoSignPDFFree. It’s an online platform that allows end-users to upload the targeted PDF, create a signature, and add the e-sign in the PDF for free. No registration and sign-up fee are applied.

How do I insert a signature into a PDF?

Yes, it is. There is a way that allows you to sign a PDF digitally without getting you involved in any software download and set-up. That way is using CocoSignPDFFree. This is the ultimate solution for all your PDF digital signatures at zero cost.

How do I digitally sign a document?

To add the second digital signature field in your PDF, you must open the file and go to Tools > Forms > Edit > Add New field > Digital Signature. A new digital signature field would be added and you can upload the targeted PDF on CocoSignPDFFree to sign it once again.

How do I create a digital signature in Adobe?

The possible reason for this issue is that your security settings aren’t allowing the form filling. You can confirm it by checking the setting at File > Properties > Security. Before getting a PDF signed, you must make sure that the PDF includes interactive, or fillable, form fields.

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