Lock PDF and Compress PDF for Desktop For Free

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Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
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Last updated on Nov 13, 2024

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
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025

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:
Like that it remembers where I was in filling in the forms. Filling in was a little awkward on the government forms I was working with. Would help to have a built in tracking mechanism to determine progress.
Ricardo Luis L
2016-05-10
I wish to gain more experience before making a committment, but, thus far, I am finding the product useful. Since writing the above, I have used the PDFfiller to complete a batch of same-format, but different forms, and found it convenient to be able to use the one basic form for each of my projects.
John H
2016-11-07
My first day! As far away from tech savvy as you can get! With help on "Team Viewer" I learned how to solve all the problems I had getting started. I will certainly use tech support again but off to a fun start.
Craig C
2017-03-20
I am am extremely impressed with this service. Very easy to use. I recommend this to any private person and businesses seeking a convenient document fill product.
John W. R
2017-06-06
The service produces a very handsome document, and facilitates changes when necessary. I had a little trouble navigating back and forth between the document and the print function, but that may be attributable to my lack of familiarity with the product.
John R
2017-11-28
This application saves me significant amounts of valuable time in the clinic The most desirable feature of this application is the time that it saves on recurrent clinical and axillary paperwork for my clients The most tedious aspect is searching for past documents which dont seem to search by just part of the title
Kelly D.
2017-10-02
What do you like best? Seamless conversion of files to various file formats. What do you dislike? Lag between switching to different parts of the interface and saving files disrupts the user experience. What problems are you solving with the product? What benefits have you realized? Easy to fill out PDF files. Easy to convert image files to required formats. Safe storage of sensitive personal information in one location.
Adam Greenblatt, MD
2022-02-10
PDF ****** is a valuable tool for my everyday work functions. It saves me so much time. **** did a fantastic job. The discount promotion available also made the basic plan affordable.Great job ****!
Tim
2021-03-04
Highly Recommended The product was exactly what I needed it for a worked flawlessly and when I experienced a technical issue, it was resolved very well. Highly recommended.
Tom Brown
2020-12-03

Lock PDF and Compress PDF for Desktop

Secure and streamline your PDF documents with the Lock PDF and Compress PDF features for Desktop. These tools provide a simple way to protect your sensitive information and optimize file sizes, making it easier to manage your documents.

Key Features

Easily lock PDF files to prevent unauthorized access
Compress PDFs to reduce file size without sacrificing quality
User-friendly interface for quick processing
Support for various PDF formats
Fast and reliable performance

Potential Use Cases and Benefits

Protect confidential business documents by locking them
Share large PDF files effortlessly by compressing them
Prepare documents for presentations or email with reduced file sizes
Ensure important contracts maintain their integrity during sharing

By using the Lock PDF and Compress PDF features, you can address your document security and size challenges. Locking your PDF files gives you peace of mind by restricting access to authorized users only. Compressing files allows for easy sharing, ensuring your documents arrive intact and accessible. With these tools, you can manage your PDFs efficiently while keeping them secure.

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 PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password to Open the Document, then type the password in the corresponding field.
First, open your file in Preview by selecting the file in Finder, hitting Space, and then clicking the Open with Preview button. In Preview, head to File > Export. In the export window, select the Reduce File Size option from the Quartz-Filter drop-down menu and then click the Save button.
Click the “Tool”>”Optimize PDF”. Here, you can choose three options for how to make a PDF smaller to email. Choose between Low, medium, and high compression.
Open the document with pages you want to resize by cropping, and click the Page Thumbnails tab. Resize the panel's width and thumbnail size as needed. To check a page's size, click the thumbnail to display the page.

#1 usability according to G2

Try the PDF solution that respects your time.
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025