Lock PDF on Linux 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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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:
Excellent, Excellent tool for business traveler and mobile home office. Just used it to sign documents while traveling and found it very usefully for my purpose.
Can't be any happier with the ease of operation and format.
Love it.
Pete
2017-05-02
No encuentro como ver siempre la página en Español, en ingles se me dificulta mucho aún y no puedo hacer uso de todas las herramientas
2020-03-27
What do you like best?
I love that this is a user friendly and cost efficient alternative to PDF editing. I have found that it can do everything (and more) than other services can. It is easy to use and excellent solution for our company
What do you dislike?
The SINGLE thing that I am not a fan of is the fact that encrypted pdfs can be sent but NOT returned encrypted. Sometimes I will send a form to an employee and need the PDF to be encrypted returned back to me and there is no option for that.
What problems are you solving with the product? What benefits have you realized?
The encrypted services have been a burden but the benefits are abundant. It is a great tool and I love that I can send our employees forms to fill out and they can receive/return them from their phones.
I love that this is a user friendly and cost efficient alternative to PDF editing. I have found that it can do everything (and more) than other services can. It is easy to use and excellent solution for our company
What do you dislike?
The SINGLE thing that I am not a fan of is the fact that encrypted pdfs can be sent but NOT returned encrypted. Sometimes I will send a form to an employee and need the PDF to be encrypted returned back to me and there is no option for that.
What problems are you solving with the product? What benefits have you realized?
The encrypted services have been a burden but the benefits are abundant. It is a great tool and I love that I can send our employees forms to fill out and they can receive/return them from their phones.
2019-02-25
Great program and awesome customer service
This program did above and beyond what I needed to accomplish for my pdf files that I needed to urgently edit. Signed up for the free trial and had no issues cancelling the subscription service when contacting the customer service for assistance. Should my work orientate around paper work and documents, I would most definitely pay for this service with peace of mind knowing that this service values it's customers.
2019-05-19
Quick on the go use
This software allows for quick on the go use with only my cellphone.
No need to print, fill out, scan and email.
There are several applications I have not used with this software
2022-07-08
Excellent Service
I did the 30 day trial period and was very satisfied with the process.I used the product for about 10 different documents within a 2 day period. I forgot about the trial period and was charged for an annual subscription and was emailed the confirmation. I went online and requested to cancel the subscription due to not needing the product and received the cancellation with 5 minutes, very satisfied.
2021-05-27
This website has helped me with filling in many forms. It is one of the easiest to learn and use, plus has so many great features that are user friendly.
2021-04-06
What do you like best?
The ease of converting documents to pdf to fill out online.
What do you dislike?
Download to my documents is not always simple. However usually can manage.
Recommendations to others considering the product:
Do it. Wonderful tool for business.
What problems are you solving with the product? What benefits have you realized?
I receive documents often from vendors, customers and regulators that require downloading and filling out. PDFfiller makes this so simple. Download, send to pdfFiller and fill out (often sign), done.
2020-08-12
Relatively easy to use and work with…
Relatively easy to use and work with files. Although, it takes a bit of effort for age challenged individuals.
2020-07-15
Lock PDF on Linux Feature
Protect your sensitive documents with the Lock PDF feature on Linux. This tool offers a simple and effective way to secure your PDF files from unauthorized access. By locking your PDFs, you can ensure that only authorized users can view, edit, or share your important information.
Key Features
Set password protection to control access
Restrict printing and copying of content
User-friendly interface for quick action
Compatible with various Linux distributions
Maintain document integrity
Potential Use Cases and Benefits
Share confidential reports with team members securely
Protect financial documents from unauthorized access
Lock personal files before sharing via email
Ensure compliance with data protection regulations
Safeguard intellectual property in business presentations
Locking PDFs on your Linux system addresses the growing concern of data security. By implementing this feature, you prevent unauthorized access, maintain confidentiality, and protect your valuable documents. As you navigate the digital landscape, securing your PDFs becomes not just important, but essential.
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
How do I protect a file with a password?
Go to File > Info > Protect Document > Encrypt with Password.
How do I password protect a file in Linux?
How to Password-Protect Files on Linux Open the terminal. Use the cd command and ls command to navigate to the directory containing the file you want to password-protect. Once inside the directory, run the following command to encrypt your file: gpg -c filename.
How to encrypt a file Linux?
That's it. Open a terminal window and generate a GPG key. ... Change into the directory housing the file. ... Encrypt the file. ... Configure the password cache agent. ... the required software. ... Open the Nautilus file manager. ... Select your encryption method. ... Decrypt the file.
Which utility can be used to password protect file in Linux?
GPG. GPG, or GNU Privacy Guard, is a free and open-source encryption tool that uses OpenPGP standard. It's a widely used tool that offers both symmetric and asymmetric encryption. With GPG, you can encrypt files with a password or a public key.
How to lock a file in Linux with password?
How to Password-Protect Files and Folders on Linux Step 1: EncFS. ... Step 2: Create a folder for EncFS. Step 3: Set up EncFS. ... Step 4: Move files into the encrypted folder. Step 5: Unmount the encrypted folder. ... Step 6: Access your files.
How do I encrypt a PDF in Ubuntu?
How to password-protect a PDF file on Ubuntu sudo apt-get pdftk. pdftk output user_pw pdftk input.pdf output output.pdf user_pw 1234.
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