Lock PDF and Merge PDF for Desktop Kostenlos

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Discover the simplicity of processing PDFs online

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Upload your document in seconds
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Fill out, edit, or eSign your PDF hassle-free
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Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
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Every PDF tool you need to get documents
done paper-free

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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.

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:
What do you like best?
Ease of use, reasonable price and continued improvements in the software.
What do you dislike?
Sometimes have trouble "erasing" things on pdfs.
Recommendations to others considering the product:
This is a no-brainer as far as I'm concerned!
What problems are you solving with the product? What benefits have you realized?
All-in-one problem solver to save documents in different formats, send documents to be signed and have the ease of an eFax at a reasonable price.
Mary Pat Whaley, FACMPE, CPC
2018-01-02
What do you like best?
I love the template feature. Working for multiple physicians practices and several providers, it's so nice to be able change the provider name so easily and even organize my documents into folders that I can access no matter where I am!
What do you dislike?
I don't have any complaints. I love the features.
What problems are you solving with the product? What benefits have you realized?
I am able to be sufficient and quickly prepare forms from anywhere I may be.
User in Hospital & Health Care
2019-05-30
A time saver A great way to fill, edit and sign PDF documents easily and on the go. Create professional-looking documents even if you are out of the office. Affordable and efficient. It includes many customizable templates for different purposes and the Drag and Drop feature makes it easy to use. Compatible with a variety of formats. None, really. It takes some getting used to after using tools such as Adobe, but overall it's pretty intuitive.
Verified Reviewer
2018-03-21
got the form filled out and signature… got the form filled out and signature done. Much better than using a typewriter (who has one of them?) or handwriting it.
Thomas Bryant
2022-05-19
How often does one get 5 star support? How often does one get 5 star support? Unfortunately the answer is not often at all. But today was different. I got 5 Star Customer Support from Kara on Team PDFFiller. More importantly Kara was patient and guided me to work through the problem with my login issue. Success all the way around. Happy customer is a loyal customer. Thank you Kara.
David Colon
2021-12-01
Easy for On the Go Editing This works great for creating editable PDFs & exporting them to clients. Can send for signatures and edit details for initial, etc. I don't dislike it but it could offer more features for the price.
Jenna W.
2021-07-23
What do you like best? The tools are easy to find in PDF filler. What do you dislike? It is sometimes difficult to execute certain tasks when the pre-highlighted boxes appear. What problems are you solving with the product? What benefits have you realized? I have learned how to use it better, which has negated some of the issues. It is a helpful tool for a job that requires me to fill out many PDF documents.
User in Construction
2021-04-13
Top notch company to work with. Software was easy to use, and they were fast to respond with customer support. Definitely will use in the future if I have more needs to use this type of software.
Ronald M
2020-11-10
Perfect for merging multiple JPG images into a compact PDF This app / web page allowed me to easily merge six JPG image files (each 2550x3300 pixels, some included photos) into a single compressed PDF document that was small enough (7MB) to be easily shared as an email attachment. Did exactly the job I wanted it to!
jeremy
2025-07-02

Lock PDF and Merge PDF for Desktop: Simplify Your Document Management

Managing PDF files can be challenging. Lock PDF and Merge PDF for Desktop helps you secure and unite your documents effectively. You can keep sensitive information safe while organizing your files into one seamless document.

Key Features

Password protection for individual PDF files
Merge multiple PDFs into one document
User-friendly interface for easy navigation
Quick access to essential functions
Compatibility with various PDF formats

Potential Use Cases and Benefits

Secure personal documents, including tax returns and contracts
Combine project reports for easy sharing with colleagues
Organize event materials for a streamlined presentation
Protect sensitive company information from unauthorized access
Simplify PDF management for students and researchers

By using Lock PDF and Merge PDF for Desktop, you can solve the common problem of handling multiple PDF files. Instead of searching through numerous documents, you can merge them into one for simplicity. Additionally, locking your PDFs ensures that only authorized individuals can view them, giving you peace of mind in an increasingly digital world.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

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
Open the app, and choose To merge or Split. If you just need to merge two documents without changing the order of any pages, choose To merge. Click Add PDFs, and select however many you want to merge. Once your documents are in order, hit Merge, and name and save the new merged PDF.
Run the tool, click on Add files / Add Folder option to insert PDFs & enter the password. Click on the Merge option and hit the Next button. Choose the desired Merge option and select the destination path.
Open the app, and choose To merge or Split. If you just need to merge two documents without changing the order of any pages, choose To merge. Click Add PDFs, and select however many you want to merge. Once your documents are in order, hit Merge, and name and save the new merged PDF.

How to Lock PDF and Merge PDF for Desktop - video instructions

#1 usability according to G2

Try the PDF solution that respects your time.
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