Encrypt PDF and Compress PDF for Android 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
Note: Integration described on this webpage may temporarily not be available.
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Last updated on 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
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:
I am very impressed at the features, especially being able to combine pdf files and edit files. I find navigating to and from the 'My Forms' area a bit clunky. The 'save as' feature takes forever to achieve, too many steps for a file that is already created. For my business, it would be a huge benefit to be able to print out a confirmation page when my faxes have been sent and received. I like to keep such confirmations with the files as proof. All in all, I love the program and am thankful for such a convenient and manageable product.
Edythe W
2016-03-17
Time saving converter. Has made the job ahead a lot easier. Cost will probably stop me from going much beyond the trial as I have not been finding a need on a frequent basis. I will tell others about it's benefits.
Jim H
2019-11-07
It is my alternative for quick editing of pdf documents I edit PDF documents quickly It's software is quite intuitive. It is easy to handle. To fill out forms is great. Also to add the signatures to the documents Once I wrote to technical support and I'm still waiting for an answer. It's the only negative I can say. In the end I solved the problem I had in another way
LIDIA M.
2018-07-10
We have been using pdfFiller over the last few years for thousands of forms for our offices. The platform is easy to use and navigate. The IT tech support is top-notch. IT Support is readily available and solves problems quickly. They communicate well, send helpful how-to videos, and/or change settings in our account to make the platform easier to use. I highly recommend pdfFiller.
Sherry S
2023-08-04
RV Purchase Offer Saving the doc from the pdf fillable to Word and then making any changes, changes spacing and became difficult to navigate the changes when trying to save as.
Paul Spencer
2022-06-11
Kara was VERY helpful Kara was very helpful, especially in suggesting we do a Zoom screen share, which made some problems I was having with navigation and document publishing much clearer. She should get a raise.
George
2021-11-26
I love Pdf Filler. I have tried ten different products similar to Pdf Filler and none of them had the features, functionality, utility, intuitive interface, and price point. I tried ADOBE and absolutely hated every moment. I cannot tell you how happy I am with your product!!! We have streamlined our HR onboarding process and our clinician credentialing process. Thank you!
Danielle E
2021-05-12
What do you like best? The ease of use, the verification of signature and the compatibility on all types of documents What do you dislike? The cost...yearly is pricey considering there are programs that you pay more upfront but it’s a one time fee What problems are you solving with the product? What benefits have you realized? Making my documents fillable for my students while teaching remotely
User in Primary/Secondary Education
2021-02-16
I really like the service a lot. It is user friendly and intuitive. I like that this also comes with Sign Now so that I can have all the forms I need for my business easy and accessible for me to get electronically signed. I would give it 5 starts except in the Sign Now program the program should default to the text box for people to sign and then have the live signature be on a separate tab, so basically reverse what it is now. It is hard for some people to get to the text box for them to type their signature. I use this all the time in my business and I would recommend it.
LynnR
2020-10-18

Encrypt PDF and Compress PDF Features for Android

Protect and optimize your PDFs with our Encrypt PDF and Compress PDF features. These tools enhance your document management on Android devices, ensuring your important files remain secure and efficiently sized.

Key Features

Encrypt PDFs for secure sharing and storage
Compress PDFs to reduce file size without losing quality
User-friendly interface for easy navigation
Compatible with various PDF files
One-tap functionality for quick processing

Potential Use Cases and Benefits

Share sensitive documents securely with encryption
Send large PDFs via email without exceeding file size limits
Store multiple PDFs on your device without using excessive space
Maintain the quality of your documents while making them smaller
Safeguard your files against unauthorized access

With Encrypt PDF and Compress PDF, you can tackle the challenges of managing large and sensitive files. By securing your documents and making them more portable, you can work more efficiently and confidently. Choose these features to enhance your PDF handling on your Android device.

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
Then open the PDF in it, that you want to encrypt. Select the file > security > open password > assign a strong password > click build.
Choose Tools > Protect > More Options > Encrypt with Password. Choose File > Protect Using Password, and then choose Advanced Password Protection from More Options.
Step 1: Download the app from Google Play Store and launch it. Step 2: Choose COMPRESS, tap + button at the bottom right. Step 3: Select a PDF file and wait for it to load. Once completed, it will be automatically saved to your Android phone.
File Locker To lock a file, you will have to simply browse it and long tap on it. This will open a popup menu from which you will have to select the option Lock. You can even batch select files and lock them simultaneously. After you select the lock file option the app will ask for a password to encrypt your files.

How to Encrypt PDF and Compress PDF for Android - 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