Switch from Nitro to pdfFiller for a Modify Mandatory Field Contract Solution For Free

Use pdfFiller instead of Nitro to fill out forms and edit PDF documents online. Get a comprehensive PDF toolkit at the most competitive price.
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

Switch from Nitro to pdfFiller in 4 simple steps

1
Sign up for free using your email, Google, or Facebook account.
2
Upload a PDF from your device or cloud storage, check the online library for the form you need, or create a document from scratch.
3
Edit, annotate, redact, or eSign your PDF online in seconds.
4
Share your document, download it in your preferred format, or save it as a template.

Experience effortless PDF management with the best alternative to Nitro

Create and edit PDFs

Create and edit PDFs

Instantly customize your PDFs any way you want, or start fresh with a new document.
Fill out PDF forms

Fill out PDF forms

Stop spending hours doing forms by hand. Complete your tax reporting and other paperwork fast and error-free.
Build fillable documents

Build fillable documents

Add fillable fields to your PDFs and share your forms with ease to collect accurate data.
Save reusable templates

Save reusable templates

Reclaim working hours by generating new documents with reusable pre-made templates.
Get eSignatures done

Get eSignatures done

Forget about printing and mailing documents for signature. Sign your PDFs or request signatures in a few clicks.
Convert files

Convert files

Say goodbye to unreliable third-party file converters. Save your files in various formats right in pdfFiller.
Securely store documents

Securely store documents

Keep all your documents in one place without exposing your sensitive data.
Organize your PDFs

Organize your PDFs

Merge, split, and rearrange the pages of your PDFs in any order.

Customer trust proven by figures

pdfFiller is proud of its massive user base and is committed to delivering the greatest possible experience and value to each customer.
740K
active users
239
countries
75K
new subscribers per month
105K
user reviews on trusted platforms
420
fortune 500 companies
4.6/5
average user rating

Get started with
an all‑in‑one PDF software

Save up to 40 hours per month with paper-free processes
Make quick changes to your PDFs even while on the go
Streamline approvals, teamwork, and document sharing
Decoration
G2 Badge
G2 recognizes pdfFiller as one of the best tools to power your paperless office
4.6/5
— from 710 reviews
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025
Best Support - Summer 2025
Easiest Setup- Summer 2025

Video Review on How to Modify Mandatory Field Contract - Nitro

Our user reviews speak for themselves

Read more or give pdfFiller a try to experience the benefits for yourself
5.0
Needed an online PDF editor for contracts, works better than expected! I can sign and edit PDF files anytime, anywhere. The availability of it from any device, anywhere. All the platforms are great both the web and local apps. Sometimes it's laggy because it runs online but I suppose that's the tradeoff of having it available everywhere.
Verified Reviewer
5.0
What do you like best? pdfFiller is very easy to use. No experience needed and provided a simple and worry free solution for one of my customers. I have started using it for o create and make changes to forms, contracts, shipping documents and much more. All of my customers are impressed with the fast turn around and the add on service I can provide them with. The program has paid for itself on many occasions. What do you dislike? When uploading some new documents it is not always to change the text to fit my needs. What problems are you solving with the product? What benefits have you realized? I have customers that do not have the employees on hand to make last minute changes to shipping documents. I am able to do this for them and ease their issues at the last minute. This allows me to build stronger relationships/
Cindy Wilson

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
Step 1: Load the PDF File. Open your pre-existing PDF form in PDF element, or you can choose to open an existing form template. Step 2: Recognize Form Fields Automatically. Step 3: Fill and Save the Form.
Part 2. How to Remove Fillable Fields with Adobe Acrobat Open the PDF in Acrobat. Run Adobe Acrobat and, using the Open option, open your PDF file in it. Go to Tools and select Prepare Form. Click the Tools tab from the top left and scroll down. Click to select a field, right-click, and select delete.
Welcome to nitro. Today we'll go through a brief overview on editing text in nitro pro. Let's getMoreWelcome to nitro. Today we'll go through a brief overview on editing text in nitro pro. Let's get started with nitro pro's editing tool moving and editing.
Click Configure next to the field configuration you wish to edit. You will see “Required” next to fields that have already been marked required. Click Optional to remove this requirement. To make an optional, visible field required, simply find the field and click Required.
How to Remove Fillable Fields from PDF with Nitro PDF Download and Nitro PDF on your computer, then find the PDF file and open it with this software. Once imported, click "Form" > "Text Fields". Right-click on it, and hit "Edit" > "Delete". At last, click "File" > "Save" to export the edited PDF document.
Click on the Forms tab, and in the Fields group, do one of the following: Click the field type that corresponds to the field you want to edit—for example, if you want to edit a text field, click the Text Field tool. Click Select Fields. Double-click the field to begin editing it.
To edit a single form field, double-click it or right-click it and choose Properties. To edit multiple form fields, select the fields that you want to edit, right-click one of the selected fields, and choose Properties.
Select File > Get Info. Locate the "Open With" section and select your preferred application. Click the "Change All" button to set the application as default.
Join 64+ million people using paperless workflows to drive productivity and cut costs