PDF Application - Certify Online Gratis
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Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Every PDF tool you need to get documents done paper-free

Create & edit PDFs
Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.

Fill out & sign PDF forms
Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.

Organize & convert PDFs
Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.

Collect data and approvals
Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.

Export documents with ease
Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.

Store documents safely
Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.
Customer trust by the numbers
64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs
Why choose our PDF solution?
Cloud-native PDF editor
Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.
Top-rated for ease of use
Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.
Industry-leading customer service
Enjoy peace of mind with an award-winning customer support team always within reach.
What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
I have found it extremely useful & very simple to use. If you can use a keyboard you can use PDF filler. Edited documents are easy to find. Would highly recommend
2016-06-19
So far, it is excellent for moderately tweaking content. It would be nice if I could select images and move them like Adobe but this is so rarely needed....
2020-01-31
Very helpful software
Very helpful software, particularly in conjunction with SignNow. Lots of flexibility and configurability. That plus the integrations found throughout the AirSlate suite make it a big value add.
2022-06-16
I am a real estate investor
I am a real estate investor. This program allows me to sign and send contracts on the fly. This program was easy to start - I was using it to sign and edit contracts within the first 5 minutes. I very much recommend PDF Filler.
2022-02-01
Your customer service named Kara was…
Your customer service named Kara was really helpful and very quick to respond to my request of refund. The money to be refunded is for my medication so I am very happy and I really appreciate your understanding and your good heart. Thank you very much to all of you. God bless and more success.
2021-09-25
Everything is okay so far.
Everything is okay so far, thank god for the merging feature. Only thing that bothered me is the zoom selection sometimes doesn't appear. Might give feedback if i encounter anything else
2021-06-29
easy to use
Very user friendly, I like it ! Create, edit and fill PDF documents easily.
MY experience with pdf Filler is really good, am able to create PDF faster and easier. Software is user friendly.
Not many cons yet, it has bugged a few times where i need to get out and start over but that has been my only issue.
2021-06-03
I finally got it to work however when I…
I finally got it to work however when I had it opened on a different browser I couldn't get it to do some stuff I was trying to get it to do and why do I have to pay more for faxing?
2021-05-14
Some times the app isn't intuitive. I have had dificulty with the earaser. Could be I haven't had your instructional course and Im doing something wrong.
2025-05-23
PDF Application - Certify Feature
The Certify feature in our PDF application simplifies the process of validating documents. With this tool, you can ensure that your PDFs are authenticated and secure, making it an essential choice for businesses and individuals alike.
Key Features
Digital signing for secure document approval
Customizable certificate options for various needs
Easy integration with existing workflows
User-friendly interface for straightforward navigation
Audit trails for tracking document changes
Potential Use Cases and Benefits
Streamlining contract approvals in business transactions
Providing verifiable proof of document authenticity for legal agreements
Enhancing security for sensitive information sharing
Improving efficiency in remote work settings
Facilitating compliance with industry standards and regulations
By using the Certify feature, you can address the challenge of document verification and security. It saves you time and effort while ensuring that your documents are protected. This feature meets your needs for authenticity, reliability, and streamlined processes, ultimately boosting your confidence in handling critical documents.
For pdfFiller’s FAQs
Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
What if I have more questions?
Contact Support
What is a Certified PDF?
A Certified PDF is a regular PDF, with a few bits of extra information: It contains information about the preflight profile that was used to check the file. It contains logging information that tells you if the preflight was successful and if any errors or notifications were generated.
How do I certify a PDF document?
On the Protect tab, in the Certify Document group, click Certify.
On the Certify Profile Wizard, choose the actions you want to permit from the Permitted actions list.
Click Next.
Select a digital ID to certify with, and choose whether to make the certificate visible.
Click Next.
How do you add a certified signature to a PDF?
Suggested clip
How to Sign a PDF with a Document Signing Certificate — YouTubeYouTubeStart of suggested client of suggested clip
How to Sign a PDF with a Document Signing Certificate — YouTube
What is a PDF certificate?
A certificate stores the public key component of a digital ID. For more information about digital IDs, see Digital IDs. When you secure a PDF using a certificate, you specify the recipients and define the file access level for each recipient or group.
What is an optimized PDF?
Most PDF editing/creation software offer an option called Fast Web View or Optimize that allows PDF files to display the first few pages of the PDF file when the document is opened, instead of waiting for the full file to be available. Optimized files are also generally smaller than non-optimized files.
What does an optimized PDF mean?
Answer: To optimize a PDF usually means to reduce the size of the files so that they are more optimal for Internet use. If you work with PDF files, there is a good chance this will be useful to you. By shrinking the size of the file, you can now send the PDFs as email attachments or even a bulk of them.
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