Last updated on
Sep 20, 2025
Unlock PDF and Lock PDF for Mobile 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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Fill out, edit, or eSign your PDF hassle-free
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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:
I enjoy the simplicity but am annoyed that you can't use certain features without paying a higher price. $80/year is pretty high for a basic subscription.
2017-04-26
So far, I really like PDFfiller and have used it to edit several documents that I needed to revised for others but previously could only leave comments for users. Using PDFfiller has made me so much more productive.
2017-11-07
I own a few franchise restaurants and have to use this product about once a week and it makes my time with documents way faster and easier. I don't have to download a document, scan it, sign it, and then rescan it and then send it. I can do it all electronically thanks the PDFfiller.
2019-05-20
Not sure yet why the W2 would not send to IRS. the button was not lit up after I completed all of my information into the W2 forms. I doubt that I will be able to afford your product due to it billing annually. Also, the price is too high for my budget. -EPOC Bookings
2020-04-03
What do you like best?
I like the fact that live Customer service is always there to guide you if there's a problem.
What do you dislike?
The only thing I dislike if when a large corporation wants a form filled out and you use PDF Filler they come back and tell you their shop uses Adobe Acrobat and to please fill out the form once again using Adobe.
Recommendations to others considering the product:
I'd recommend it
What problems are you solving with the product? What benefits have you realized?
It has saved me many hours of editing and signing contracts and agreements
I like the fact that live Customer service is always there to guide you if there's a problem.
What do you dislike?
The only thing I dislike if when a large corporation wants a form filled out and you use PDF Filler they come back and tell you their shop uses Adobe Acrobat and to please fill out the form once again using Adobe.
Recommendations to others considering the product:
I'd recommend it
What problems are you solving with the product? What benefits have you realized?
It has saved me many hours of editing and signing contracts and agreements
2020-01-09
What do you like best?
The support team is very helpful and responds quickly.
What do you dislike?
The product was excellent our company is too small to make proper use of their services. I would have appreciated being able to purchase the service to use on an as-need basis.
What problems are you solving with the product? What benefits have you realized?
This product allowed me to make pdf forms that could be filled out online/electronically rather than printed, manually filled out and scanned.
The support team is very helpful and responds quickly.
What do you dislike?
The product was excellent our company is too small to make proper use of their services. I would have appreciated being able to purchase the service to use on an as-need basis.
What problems are you solving with the product? What benefits have you realized?
This product allowed me to make pdf forms that could be filled out online/electronically rather than printed, manually filled out and scanned.
2020-01-17
Blogger - PDF Filler
Online use without having to download anything onto your computer. If you are a blogger you have too much on your desktop already!
Easy to use. No need to have other software to fill-in your PDFs (contracts, flyers, etc.). This can be used online on any computer. You can even have docs e-signed. There's also a free trial.
I do not have anything bad to say about it. It was easy to use. I will continue to use and refer people to it.
2020-01-07
It was easy to navigate and find the forms that i needed and fill them out without confusion. I was able to fill iin information and send to my email with ease.
2024-09-02
I really enjoy how user friendly the program is. If I had any complaints, it would be that I have to change the size of the font if I am updating a previous document that I edit.
2024-09-01
Unlock PDF and Lock PDF for Mobile
Manage your PDF files with ease using our Unlock PDF and Lock PDF features designed for mobile. Now, you can access, edit, and protect your documents on the go.
Key Features
Unlock PDF files for instant access to the content you need
Lock PDF files to protect sensitive information with a password
User-friendly interface designed for a seamless mobile experience
Compatibility with various types of PDF documents
Fast processing time for both unlocking and locking functions
Potential Use Cases and Benefits
Unlock important documents for quick edits or reviews
Lock files before sharing them to ensure privacy and security
Convenience for professionals needing quick access to paperwork on the move
Safeguarding personal information in sensitive documents
Simplifying document management while traveling or working remotely
By providing these features, you can confidently handle your PDF files anywhere. Whether you're unlocking a file to make important changes or locking it to maintain privacy, our solution addresses your needs effectively. Take control of your documents and enjoy peace of mind knowing your information is secure.
How to Use the Unlock PDF and Lock PDF for Mobile Feature
Unlock PDF and Lock PDF for Mobile is a convenient feature of the pdfFiller product that allows you to easily unlock and lock PDF files on your mobile device. Follow these simple steps to make the most of this feature:
01
Open the pdfFiller app on your mobile device.
02
Sign in to your pdfFiller account. If you don't have an account, you can create one for free.
03
Once you're signed in, tap on the 'Unlock PDF' or 'Lock PDF' option, depending on what you want to do with your PDF file.
04
If you selected 'Unlock PDF', you will be prompted to upload the PDF file you want to unlock. Tap on the 'Upload' button and select the PDF file from your device's storage.
05
After the PDF file is uploaded, pdfFiller will automatically unlock it for you. You can now make any necessary edits or changes to the unlocked PDF file.
06
If you selected 'Lock PDF', you will be prompted to upload the PDF file you want to lock. Tap on the 'Upload' button and select the PDF file from your device's storage.
07
After the PDF file is uploaded, pdfFiller will lock it for you, ensuring that no further changes can be made to the file.
08
Once you have unlocked or locked the PDF file, you can save it to your device or share it with others via email, messaging apps, or cloud storage services.
09
To access your unlocked or locked PDF files later, simply open the pdfFiller app and navigate to the 'Unlocked PDFs' or 'Locked PDFs' section, depending on the action you performed.
10
From the 'Unlocked PDFs' or 'Locked PDFs' section, you can easily manage and organize your files, rename them, delete them, or perform other actions as needed.
With the Unlock PDF and Lock PDF for Mobile feature, you have the flexibility to unlock and lock PDF files on the go, making it easier than ever to manage and secure your important documents.
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 can I open password-protected PDF file in Mobile?
Now, Open your file explorer, the default one or ES and navigate to the password encrypted PDF file you intend to open. Here select the Open with Drive PDF Viewer option as shown in the above image. Here, enter the password given to you for the PDF file and tap on the Open button.
How can I remove password from my mobile?
Unlock your mobile device.
Open Settings.
Tap the Lock Screen or Lock Screen and Security option.
Tap Screen Lock Type.
Under the Biometrics section, disable all options.
How do I password protect a PDF on Android?
Start by downloading the app from Google Play. Next, open it > password protection > import the PDF from your device memory. If you don't see any directory, clear the app data and try again. Now, you'll see two password option owner password and user passwords.
How can remove password from PDF file in Mobile?
Download and install PDF Utilities from Google Play.
Make sure that you've already downloaded the PDF file of which you want to remove the password.
Open the PDF Utilities app and tap Select next to Select PDF.
Once you've located your file, select it and tap Start.
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