Your browser is more powerful than you think: Alter PDF in Mozilla Firefox For Free

Drop document here to upload
Select from device
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.
0
Forms filled
0
Forms signed
0
Forms sent

Discover the simplicity of processing PDFs online

Card illustration
Upload your document in seconds
Card illustration
Fill out, edit, or eSign your PDF hassle-free
Card illustration
Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal

Every PDF tool you need to get documents
done paper-free

Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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:
The stars did not appear on this survey, so nothing is marked; however, this was and still is a great service, and is very much needed as it is a very helpful tool in filling out forms that do allow computer input. :-)
Michelle
2014-07-28
I first tried PDFfiller with a trial subscription and to be honest, I really just wanted it so I could add text to a document and I didn't plan to extend my subscription. But after trying it, I liked it so much, I continued the subscription after the trial and my subscription expires in 2 days and I plan to renew for another year. I'm a freelance paralegal and often need to add text (and complete forms) in .pdf format. The program is also very easy to use and has many great features (like "erase" and different font styles and sizes). My subscription has more than paid for itself and I would - and do - highly recommend PDFfiller to anyone looking for this type of program.
Vanessa
2017-06-02
will cost reasonable to use site and programs and features. I love it to take any document and can make changes or add. its like all in one even the fax number and price which I will use.
Roger O
2017-12-24
Would like to see a better way to organize/save files for easier opening. Would like to see a way to convert files to PDF as well. No need to send a follow-up survey, your system won't allow us to complete it without having a Facebook or Linkedin account...we know our own e-mail address and it won't accept it.
Carolyn Y
2019-01-26
I would've liked a place to find all the PDFfiller features. It was really difficult to make it until I found the think where it places textboxes for me. Overall good experience especially for something I didn't have to pay for!!
Anonymous Customer
2024-09-28
Quick download, easy fillable PDF forms online very practical online fillable forms but using the snail mail from the IRS, i was able to obtain the same forms via mail a week later. I like its free trial but only needed the 2022 W2 form and not the entire services
WarrenD
2023-06-01
Great online pdf editor I love this software and use it frequently. Has a free trial, has many tools, easy to use and has template searching capabilities. If you have the basic plan, customer support could take 24 hours to get to you. If you have the premium plan, customer support answers immediately.
Britany S.
2022-03-31
I really enjoy using PDF filler. I consider my self to not be computer savy at all. I would really like it if there were a webinar to help people like me understand this app.
Tanna W
2021-07-07
Overall I'm satisfied Overall I'm satisfied, however, the edit tool is giving me some trouble. While I can edit, my corrections are not being saved :0(
Andrea Lisbon
2021-01-27

Alter PDF in Mozilla Firefox easily

For many individuals, an internet browser is a primary tool for their work. Most of their routine tasks can be completed fast and easily. However, not so many online solutions can offer quality. And finding a solution that’s worth your time and efforts can be complicated.

pdfFiller is a leading platform for editing, storing, and sharing documents online, without leaving a single browser tab. It combines multiple tools with a user-friendly interface and high-level security measures that can be quickly accessed right from the browser. If you want to Alter PDF in Mozilla Firefox, consider taking advantage of pdfFiller.

pdfFiller is a time saver for individuals and businesses alike. Briefly, time saving equals money saving. Stop using multiple platforms and make the most from one, holistic PDF editor. Choosing pdfFiller equals choosing sleek document workflows and convenience.

01
Sign documents electronically. Put legally-binding electronic signatures to sign papers from anywhere, anytime.
02
Automate documents. Add fillable fields with different validation types to speed up the process of collecting information.
03
Manage records. Merge, split, lock, unlock files in a few clicks.
04
Modify PDFs. Add or change texts, rotate or remove pages, insert watermarks, etc.
05
Export files the smart way. Download samples to your device, send them by email, fax, or even mail.
06
Send requests. Send out documents for signing. Add extra authentication via social media profiles or signers’ photos if needed.

Using pdfFiller, you get all the features you require right away. You also don't need to worry about free space on your hard drive; pdfFiller allows users to Alter PDF in Mozilla Firefox without installing any additional programs. A stable internet connection is enough to start skyrocketing your document management. Go paper free with pdfFiller and improve the way you deal with PDF files!

Alter PDF in Mozilla Firefox

Discover how to efficiently manage and modify your PDF documents directly within Mozilla Firefox. This feature lets you adjust your PDFs without the need for additional software, streamlining your workflow.

Key Features

Edit text and images in PDFs.
Merge multiple PDF files into one.
Split a PDF into smaller files.
Convert PDFs to various formats.
Add comments and annotations.

Potential Use Cases and Benefits

Quickly edit a project proposal without switching apps.
Combine documents for a client report into a single file.
Separate pages from a lengthy PDF for focused discussions.
Share feedback directly on PDF documents for easy collaboration.
Convert a PDF resume into an editable format for job applications.

This feature addresses your need for convenience and efficiency. By allowing you to manipulate PDFs within your browser, you save time and avoid unnecessary downloads. Whether you are preparing documents for work, school, or personal use, Alter PDF in Mozilla Firefox makes your life easier.

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
How to edit a PDF file online: Drag and drop your PDF document into the PDF Editor. Add text, images, shapes or freehand annotations as you wish. You can also edit the size, font, and color of the added content. Click 'Apply' and save the changes and download your edited PDF.
Firefox includes a built-in PDF viewer to display PDF files inside the browser window.
The PDF Viewer in Firefox doesn't allow for editing a PDF file, especially one that is online. To edit a PDF file you would need to download and save the PDF file and then use an external PDF application or editor to edit that file.
PDF file handling options Go to Options > Applications, then find the listing for Portable Document Format (PDF). Under the Action column, you'll see that it's set for Preview in Firefox. Click the drop-down list to select an alternate PDF viewer.

Video instructions on how to Alter PDF on Mozilla Firefox

#1 usability according to G2

Try the PDF solution that respects your time.
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal