Your browser is more powerful than you think: Alter PDF in Mozilla Firefox Gratis
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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.

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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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What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
The forms are very easy to fill out. I was unable to comments in a few places where I ran out of room for heirs and needed to include a comment to refer to an additional page.
2018-01-17
I use PDFfiller for so many things. Filling in documents like applications, signing documents without printing them, modifying PDF files. It has been an invaluable tool.
2018-12-07
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?
PDFfiller is a great way for me to pre-fill documents that I use on a regular basis for my clients. By having as many fields clearly completed as possible, transactions that may have been held up due to illegible or missing information can be processed much more quickly. Clients also appreciate not having to do as much work! I also like the fact that I can use a social media signin for PDFfiller instead of having to create a separate user ID and password. It's one less thing that I have to remember.
What do you dislike?
Sometimes, I get frustrated by the "auto-detect" feature that highlights an entire line of a form. I'd rather use the text insertion feature and place text where I want it rather than have to edit the whole line. The other frustrating thing is having to make sure you're logged out on one computer before using it on another device in the office!
Recommendations to others considering the product:
I recommend PDFfiller without hesitation, with one caveat: only one sign-in is allowed at a time per user. If you use multiple computers at your place of employment, make sure you're signed out of PDFfiller on one computer before trying to sign on with the other. It will save you some aggravation. This is especially frustrating if you use the program on a desktop and a laptop and forget to sign out of the desktop computer before bringing the laptop home to work remotely. I did do a lot of research before deciding to invest in PDFfiller, and after my due diligence was hard-pressed to find an option with all of the features that I needed and at a price point that I felt was affordable. For the money, PDFfiller is a great investment for offices looking for ease and convenience with pre-filling forms. The learning curve is not very steep, and there is a lot of functionality for adding features besides text: check/"x" in specific boxes, highlighting, erasing, etc. I have used all of those features with little to no difficulty. Erasing is a bit of a science, with some trial and error involved in determining the exact size of the eraser needed for the job. Being able to move inserted text around easily and increase or decrease the font size as needed is a very helpful feature, especially if you want to call attention to certain pieces of information or make them stand out from the rest of the document. While I have not used the signature feature very often, I have found it to be useful in the rare instances that I have needed it. I have a copy of my signature saved in PDFfiller, which makes it very easy to insert a signature field into documents. Clients also appreciate this feature as well.
What problems are you solving with the product? What benefits have you realized?
PDFfiller is making it a lot easier for me to personalize and email forms to my clients, improving their service experience and saving me time and trouble. It's a huge convenience for me and much appreciated by clients whose handwriting is less than clear! The biggest benefit to me is having a library of frequently used documents that I can pull up on the fly, make adjustments and edits to a few fields, and have a new document ready to go in a matter of minutes. I've also been able to add information in the "white spaces" of forms I have created in the past, to include client-specific text, contact information and other items.
PDFfiller is a great way for me to pre-fill documents that I use on a regular basis for my clients. By having as many fields clearly completed as possible, transactions that may have been held up due to illegible or missing information can be processed much more quickly. Clients also appreciate not having to do as much work! I also like the fact that I can use a social media signin for PDFfiller instead of having to create a separate user ID and password. It's one less thing that I have to remember.
What do you dislike?
Sometimes, I get frustrated by the "auto-detect" feature that highlights an entire line of a form. I'd rather use the text insertion feature and place text where I want it rather than have to edit the whole line. The other frustrating thing is having to make sure you're logged out on one computer before using it on another device in the office!
Recommendations to others considering the product:
I recommend PDFfiller without hesitation, with one caveat: only one sign-in is allowed at a time per user. If you use multiple computers at your place of employment, make sure you're signed out of PDFfiller on one computer before trying to sign on with the other. It will save you some aggravation. This is especially frustrating if you use the program on a desktop and a laptop and forget to sign out of the desktop computer before bringing the laptop home to work remotely. I did do a lot of research before deciding to invest in PDFfiller, and after my due diligence was hard-pressed to find an option with all of the features that I needed and at a price point that I felt was affordable. For the money, PDFfiller is a great investment for offices looking for ease and convenience with pre-filling forms. The learning curve is not very steep, and there is a lot of functionality for adding features besides text: check/"x" in specific boxes, highlighting, erasing, etc. I have used all of those features with little to no difficulty. Erasing is a bit of a science, with some trial and error involved in determining the exact size of the eraser needed for the job. Being able to move inserted text around easily and increase or decrease the font size as needed is a very helpful feature, especially if you want to call attention to certain pieces of information or make them stand out from the rest of the document. While I have not used the signature feature very often, I have found it to be useful in the rare instances that I have needed it. I have a copy of my signature saved in PDFfiller, which makes it very easy to insert a signature field into documents. Clients also appreciate this feature as well.
What problems are you solving with the product? What benefits have you realized?
PDFfiller is making it a lot easier for me to personalize and email forms to my clients, improving their service experience and saving me time and trouble. It's a huge convenience for me and much appreciated by clients whose handwriting is less than clear! The biggest benefit to me is having a library of frequently used documents that I can pull up on the fly, make adjustments and edits to a few fields, and have a new document ready to go in a matter of minutes. I've also been able to add information in the "white spaces" of forms I have created in the past, to include client-specific text, contact information and other items.
2020-02-06
PDF FILLER
I have used this for payroll and accounting documents at work and for personal use as well. I have not had any trouble using it at all.
The ease of use if wonderful. I love how much more professional documents look when using the PDF Filler than hand writing. That is another thing I love about this software - you can do it all on the computer/laptop and just attach to an email if you need to send it to someone or print for the files if that's what is needed.
I don't believe I have anything I don't like about it!! Who like hand writing forms??
2019-04-26
Great customer service
Great customer service! Emailed pdfFiller and received a prompt response from Grace, who managed to resolve the issue within minutes!!
2022-05-22
What do you like best?
How easy it is to access all documents and edit previous documents
What do you dislike?
I wish there were more tools to help edit, such as cropping a document or resizing
What problems are you solving with the product? What benefits have you realized?
It usually takes a while or is difficult to edit a document, but with PdfFiller, it's easier and faster. I can take a form I often use, and instead of entering the information every time, I can change the date
2021-08-04
Never had yo use this before but it was…
Never had yo use this before but it was easy!!! But i only needed to use it one time..But it was good..:)
2020-11-04
where has this been all my life
where has this been all my life. i'm 20 minutes into download, clicked buy, installed laptop & cell. already created two forms & makes my time with older versions of fillable PDF generator programs seem like a million years ago.
2020-09-22
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.
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 edit a PDF in my browser?
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.
Can Firefox handle PDF files?
Firefox includes a built-in PDF viewer to display PDF files inside the browser window.
Can you edit a PDF in Firefox?
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.
How do I change PDF in Firefox?
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
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