Why can't I fill and sign my PDF?

Make sure that the security settings allow form filling. (See File > Properties > Security.) Sometimes form creators forget to convert their PDFs to interactive forms, or they intentionally design a form you can only fill in by hand. If you can't type in the form fields, then the fields are probably not interactive.

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Add Formula Field Button to PDF For Sign in Dropbox For Free

Based on 12500+ reviews

Last updated on Jan 16, 2026

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pdfFiller scores top ratings on review platforms

This is only my second time but I do like how easy it is to type directly on the file. Just waiting to make sure they received it on the other end. Thanks

Sonya H

Less than satisfactory. I filled in a document. Made a mistake with one numeral and have yet to be able to \correct it. I 've being trying for 2 hours mwith no luck

Anonymous Customer

Only day 1, but so far so good. Love that all my files are stored in one place to access from any computer! Easy to use and email files. Great investment so far!

Naomi P

What do you like best?
Easy to use, and safe for signatures, recommend this product
What do you dislike?
Love this product, there has not been any issues
What problems are you solving with the product? What benefits have you realized?
Electronic signatures on HIPPA related forms

Administrator in Health, Wellness and Fitness

Great to mark up documents. I like this software and they have a money back guarantee of 100 days I believe. I use this product to mark up documents and sign. I like to keep everything that I do 100% electronic, so with products like this, I am able to do so. I haven't found anything wrong with this software. It is great for any industry who deals with electronic PDF files.

Leticia G.

10/10 -- doesn't get better! The product was flawless and exactly what I needed. They are the best! I had some issues that required customer service and they went above and beyond to assist me. Thanks, Sam! Highly reccomend.

Michelle Giangrande

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