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Last updated on Sep 21, 2025

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Combine multiple PDFs into one.
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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.
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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.
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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.
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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.
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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.
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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.

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What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
I LOVE THIS SERVICE SO FAR. IT HAS ALLOWED ME TO CREATE THE DEMOGRAPHICS FORM FOR TAX PAYERS IN THE LAY OUT THAT I ALWAYS DESIRED. THE BONUS TO THE LAYOUT IS THE PDF FILL IN THAT ALLOWS YOU TO INSTRUCT THE CLIENT RIGHT WITHIN THE CELL. THE SEND TO SIGN FEATURE IS AMAZING IT ALLOWS ME TO OFFER A FASTER SERVICE WITH OUT HAVING TO HAVE A PERSONAL INTERVIEW.
ANGELA B
2017-01-11
What do you like best?
I can take forms from online and my computer and can easily and neatly fill them in. I also love the form creation feature.
What do you dislike?
Learning to create forms is much harder than expected.
Recommendations to others considering the product:
Great service. Uploading and using forms is intuitive and easy. Allow time for learning if creating own forms.
What problems are you solving with the product? What benefits have you realized?
I mainly use it to complete and store forms. I plan to use it to create forms in the future.
Nancy A. Burnett
2018-01-02
What do you like best?
The ablitiy to be able to edit documents in PDF format is great. Saving time. When we are bidding on a job i can use the form provided to us from the client. Very easy to use and has worked well ever time I have neede it. Another great feature is that the PDF filler is auto saved in your online profile... so you can take the documents with you.
What do you dislike?
some times when you go to open the PDF from my email directly... it does not up load... so then I have to down load the pdf on to my computure, open PDF fill web app then upload file..... not sure why it does this but it has happened more often lately than it did before.
Recommendations to others considering the product:
It would be great if the filler could be able to authenticate docuements, a big one for us is Bonding, When we submit a bond they require an e-bonding ( look it up) the ebond authenicates the signatures from 3 different parties and leave a digital paper trail that can be confrimed by the client. We recently had to do this and the one website mobile bonds.com has an interface that is not user freindly for set up... and we had to spend countless time with the tech on the phone for the first few bonds. If the filler is able to do this that would be great.
What problems are you solving with the product? What benefits have you realized?
Allowing us to make our bid proposals look great, avoid hand writing in documents, setting us apart from the rest. we also can share the file with my staff making it even better
Dorian Andrews
2019-02-25
Spectacular PDF Editing Program! I work with PDFs every day as part of my job and being able to unlock PDFs or make edits has become so easy and seamless with this program. I could not do without it!
Nycole Rochford
2024-11-05
BEST all-in-one Platform for business and personal use!!! I am in LOVE with this app!! This platform provides an all-in-one service for a price you just cant beat. Without a doubt the #1 MUST-HAVE business tool that trumps all the rest. They even offer Monthly or Annually subscriptions giving the user some flexibility pricing to choose what suits them best based on their individual or professional needs. Absolutely worth every penny!!
Jade Erickson
2023-12-27
After searching for a long time for a tool that transfers pdf's into files that I could use on my MacBook Pro, I finally found one that works very well. I'm happy
John H
2023-02-16
I MADE A FEW ERRORS DUE TO UNCLEAR… I MADE A FEW ERRORS DUE TO UNCLEAR DIRECTIONS WHICH WERE EXPLINED TO MY SATISFACTION. A SATISFYING LEARNING EXPERIENCE.
BEN HARRISON
2021-11-07
I HAVE JUST STARTED USING THIS METHOD AND STILL FINDING MY WAY ROUND, STILL MAKING UP MY MIND WHETHER I WILL BE UTILISING THIS PLATFORM FULL TIME. IT WILL DEPEND ON COST IN THE FINAL DECISION MAKING.
BEV
2021-01-26
What do you like best? Easy tools to edit and send email/fax is a breeze What do you dislike? Download forms from third party is not useful with provider business names. Recommendations to others considering the product: Good for business especially with email and fax service is free. What problems are you solving with the product? What benefits have you realized? Leases, company business editing.
User in Financial Services
2020-11-05

pdfFiller — a simple tool to Merge and Lock PDF

If you have ever encountered issues with trying to Merge and Lock PDF using the online solutions only, you're not the only one. Hours were spent switching back and forth between multiple solutions. Use pdfFiller to get things done better and automate such processes.

Why pdfFiller? It's a professional, online PDF editing tool that actually works from the cloud. Just open a browser, log in to your account, pick a form template, and Merge and Lock PDF in no time. Done online, the process of editing files in PDF is simple and fast, smooth actually. An advanced set of tools allows you to do what you need and more. Here are the most helpful tools you can use with your documents on pdfFiller:

01
design. Certify forms or agreements straight from your device
02
Extensive export. Send a document by email or fax, transfer it to the cloud, or download in one of the available formats: PDF, DOCX, XLSX, PPTX, and JPG
03
Templates. Create reusable forms and fill them out as many times as you need
04
Fillable fields. Insert to let others to type information
05
Layout management features. Rotate, add, or delete form pages to make it work for your particular situation
06
Watermarks. Protect your template

pdfFiller is not only handy but keeps the data protected. Your information is stored and transferred among the web servers strictly following the GDPR standards, and encrypted. Thanks to the two-factor authorization, you don't need to go another day with your data exposed to unwanted third parties.

Value your time and get started with pdfFiller for a more streamlined approach to how to Merge and Lock PDF.

Merge and Lock PDF Feature

The Merge and Lock PDF feature simplifies your document management. With this tool, you can easily combine multiple PDF files into one secure document. This feature ensures your files are organized, accessible, and protected.

Key Features

Combine multiple PDF files into one document
Lock merged PDFs with a password for security
Preserve original formatting and quality
User-friendly interface for effortless merging
Quick processing time for efficient workflow

Potential Use Cases and Benefits

Organizing documents for presentations or meetings
Creating a secure document for sensitive information
Simplifying the sharing of related files with colleagues
Streamlining archives for easy retrieval and management
Enhancing collaboration on projects by merging contributions

This feature addresses common issues, such as difficulty in managing multiple files or securing sensitive information. By allowing you to merge and lock your PDFs, you can keep your documents organized, while also safeguarding your data. Experience the convenience of having everything in one secured file, making your life easier.

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