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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
Based on 12500+ reviews
Last updated on Jan 16, 2026

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pdfFiller scores top ratings on review platforms

Users Most Likely To Recommend - Summer 2025
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I love the program. I could wish it had some other features for editing the existing documents but for what I generally need (real estate forms) it is fantastic!
Robert M
What do you like best?
Ability to add notes to PDFs for my clients. It really does help answer questions for them much faster and help them understand the document better.
What do you dislike?
I wish I could merge and rearrange documents without it costing more to upgrade to do so. Would also be nice if If could set two password when securing a file. One for client and my master password
What problems are you solving with the product? What benefits have you realized?
Being able to mark up pdf documents for my clients that otherwise I could not. I like the pen option to call out important numbers for them to review. Being able to highlight where there signature is needed is an added plus
Consultant in Financial Services
What do you like best?
I utilize the feature for certificates of insurance. It’s very nice to have the mobile app to be able to use that when I’m on the go .
What do you dislike?
The way it saves documents or re-saves them or use as a template is very confusing . And not all of the options on the desktop version are also available on the mobile version .
What problems are you solving with the product? What benefits have you realized?
Certificates of insurance
Joseph Rex
I was having more problem with another program, and came across this one, and it seemed so much more simple. I was able to understand this tutorial better than another program, and took care of my needs.
Twana
What do you like best? Editing, merging and marking-up PDF documents and particularly drawings (I am an architect) is easy to do on the program. Editing, deleting selected pages and merging are the most common features that I use, and this is easily done on pdfFiller. It would be helpful if the program has better ways to draw lines and circles, etc., as these are basic needs when marking-up drawings. These features need to be improved. What do you dislike? Drawing features are not user friendly and need to be improved. Highlighting, which is available on pdfFiller, can only be done in straight lines and not at an angle or in curved shapes. This needs to be improved. What problems is the product solving and how is that benefiting you? Editing and merging PDF documents, marking-up PDF drawings. These are my most critical needs for document review and pdfFiller allows me to do all of this easily.
Verified User in Construction
Quick, easy, and efficient Amazing Makes building and filling out forms a breeze. The automation is great in making sure all information is included and correct. I have had no bad experiences with this software thus far.
Alex B.
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