Lock PDF and Add Watermark to PDF for Mac Gratis

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Última actualización el Dec 12, 2023

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
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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:
I was given forms from the VA but they were copied crooked and there was very little space to write. I am glad that I found your site. I was able to get the forms complete them and turn them in nice and neat.
Jacquelyn S
2017-08-15
I write reports for evaluations. Litigation has mandated that these reports be quite extensive. Handwriting them took hours. Scanning the forms into a pdf and allowing me to edit them is immeasurably helpful to maintaining my sanity.
Chuck B
2018-03-04
I have had trouble finding documents and sending them in the past, it seems as though this site is easier to use today. I'm not the most tech savvy person in the world so I am learning sometimes the hard way! Definitely easier yesterday: to find documents to fill out and send. Makes billing a breeze!
Gavriella V
2019-10-30
The best PDF converter Excellent. My current job is as freelance translator, and sometimes my customers send me the documents in PDF. for me, it's easier to work with WORD format. You can convert any type of file into editable one. In case of scanned PDF, it doesn't work.
Verified Reviewer
2019-03-12
A Superb App to Create Fillable PDF Forms The most easiest app to create fillable pdf forms in the most efficient way. Furthermore, editing an existing pdf is so much easier with super features such as text editing, adding watermark, merging and splitting pdf files, etc. This is a paid application. Editor interface is not that simple and you need more time to learn for the beginne
Zulkamal Z.
2018-11-29
interesting...I am a sponsor for a nonprofit addiction recovery program and this would help me lead my sponsees through their step work and writing assignments.
Greg H
2023-02-09
Good Product I need a pdf editor and I use this product because it is a cheaper alternative I like and need a product that allows me to edit and mark a pdf file. The Editing feature on this product was hard for me to master
David L.
2023-01-13
What do you like best? It is much easier to use than Adobe Acrobat. Much more intuitive functions and file management. It has saved me a ton of time with the cloud storage of documents. I have used effectively for construction related documents. What do you dislike? Very rarely I have needed to use another platform because some municipalities require it but 98% of what I need to do is supported. What problems are you solving with the product? What benefits have you realized? Remote completion of forms and extracting text from PDF documents mostly.
James Worrell
2021-02-16
Took some time to get used to it's… Took some time to get used to it's quirks after years of using Adobe Acrobat. But, I have actually found it easier to use and can do more .
K. McCarthy
2021-01-19

Lock PDF and Add Watermark to PDF for Mac

Protect your important documents with our Lock PDF and Add Watermark to PDF feature for Mac. This tool allows you to secure your files effortlessly and ensures that your content stays safe.

Key Features

Easily lock PDF files with a password for added security.
Add customizable watermarks to prevent unauthorized use.
User-friendly interface designed for efficient workflow.
Compatible with various PDF formats to suit your needs.
Quick processing time, allowing for immediate document protection.

Potential Use Cases and Benefits

Safeguard confidential information for business reports.
Deter unauthorized copying of creative work.
Enhance brand visibility with watermarked files.
Secure sensitive student documents for educational purposes.
Maintain control over proprietary information.

This feature effectively solves your document security concerns by providing a simple way to lock files and add visible watermarks. When you use this tool, you can share your documents confidently, knowing they remain protected from unauthorized access and misuse. With the added ability to customize watermarks, you enhance your document's credibility while discouraging unauthorized duplication.

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
Folders can't be directly encrypted in macOS, but you can put them in password-protected containers. This has the effect of protecting your folders and the files they contain with a password. You can password-protect folders on macOS using the built-in Disk Utility application or a third-party tool called Encrypt.
In the Preview app on your Mac, open the PDF that you want to password-protect. Choose File > Export, then select Encrypt. You can also enter a new name for the PDF if you want to create a pass worded copy and keep the original PDF unencrypted. Type a password, then retype it to verify the password. Click Save.

How to Lock PDF and Add Watermark to PDF for Mac - video instructions

#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