Add fillable fields to Letter with an AI-enhanced solution in a snap

*Powered by ChatGPT
Harness the power of AI for smarter and faster document processing with an enhanced PDF experience.
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.
1
Upload your document to pdfFiller
2
Open your file in the online PDF editor
3
Chat with the PDF AI
4
Edit your PDF or get additional insights using the AI’s outputs
5
Download, export, or share your edited PDF

AI-Enhanced Fillable Fields for Your Letters

Transform your letters into professional documents with fillable fields using our AI-enhanced solution. This feature allows you to create interactive letters effortlessly, catering to a variety of needs. Whether you are drafting business proposals, personal invitations, or legal documents, this tool simplifies your workflow.

Key Features

Easy integration into your existing letter templates
AI-powered suggestions to enhance content and structure
Customizable fillable fields for tailored user experiences
Quick setup for immediate use and efficiency
User-friendly interface that requires no technical skills

Potential Use Cases and Benefits

Create client contracts that customers can fill out instantly
Design personalized invitations for events, ensuring guest information is collected efficiently
Generate feedback forms that can be filled out online for better engagement
Prepare tax forms where users can enter their information directly, reducing errors
Draft surveys that respondents can complete easily, increasing return rates

By using our AI-enhanced letter feature, you solve the common problems of efficiency and accuracy. It eliminates the hassle of multiple drafts and reduces the back-and-forth communication typically needed for document completion. You save time while providing your recipients with a clear and interactive experience.

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

Get instant help from an AI assistant when working on your PDFs

Ask the PDF AI to modify or analyze content for faster edits and better comprehension.
Card icon
Online AI PDF editor
Edit, organize, and manage your PDFs faster than ever with integrated AI tools that make content processing a breeze.
Card icon
Chat with PDF
Interact with your documents in real time for quick edits, suggestions, guidance, additional insights, and more.
Card icon
Summarize PDF
Condense lengthy PDFs into concise summaries using an advanced AI PDF summarizer, saving time and improving comprehension.
Card icon
Rewrite PDF
Instantly rephrase content within your PDFs to improve clarity and readability with the easy-to-use AI PDF rewriter tool.
Card icon
Explain PDF
Get instant explanations of complex terms and concepts mentioned in your PDFs for a deeper understanding and faster document processing.
Card icon
Proofread PDF
Ensure your documents are error-free by enabling the AI PDF proofreader that detects and corrects grammar, spelling, and punctuation mistakes.

Simplify complex processes with the power of AI

Check out some of the most common use cases of the AI-powered PDF editor.
Contract review
AI-assisted editing simplifies the process of reviewing and modifying legal documents, ensuring accuracy and reclaiming working hours.
Research
Summarize and navigate lengthy articles quickly to enhance comprehension and facilitate knowledge acquisition.
Proposal drafting
Refine and proofread business proposals with AI-driven tools that ensure your path to success with polished, error-free content.
Training and onboarding
Improve the clarity of instructional or onboarding materials, making them more accessible and effective for trainees or employees.

Users love pdfFiller’s simplicity and powerful features

4.0
Overall the format is excellent -- the clearest, fastest and most accessible set of URL instructions I've ever used -- EXCEPT haven't yer succeeded in getting a doc e-signed! Maybe we were missing a step. The doc got e-sent to the signer, but all he ever got was the sample doc to fill out -- but it wouldn't let him fill it out. and just kept popping up the sample doc. Even tho ' it side we'd successfully down loaded the doc - but it appears it kept downloading the same sample doc and not the one I'd sent him to sign,
Thomas James K
5.0
Great customer service! The site works very well and is easy to navigate, and when a miscommunication happened on my end the company was extremely polite, helpful, and quick in their response. Great customer service!
Shylee R Turner

Effortlessly Add fillable fields to Letter with AI-driven tool

Do you need to alter your Letter quickly? Utilizing AI gives you the quickest way to do this. And the perfect tool is just a click away! pdfFiller enables you to complete your job swiftly, eliminating the need to download or install software. You only need your computer and a stable internet connection to Add fillable fields to Letter with AI-powered solution; pdfFiller facilitates straightforward paperwork editing no matter your location.
Our full-featured platform provides a number of basic and advanced editing, annotation, and data protection features—an ideal option for individuals and small organizations alike. The interface is user-friendly and easy to grasp. No need to spend time figuring things out—we offer a great deal of instructions and tutorials to ensure a smooth start with our solution.

How to Add fillable fields to Letter with AI-driven tool in a few steps:

01
Navigate to the pdfFiller website, where you’ll be able to either log in to your existing account or set up a free one.
02
Hit the Add New button from the Dashboard to add or transfer your form.
03
Click on to open the form, and locate the option to Add fillable fields to Letter with our AI-driven tool.
04
Take advantage of other functionality in the toolbar to give your form a neater and more structured look.
05
Check the executed copy and save the document in the preferred format.
06
Manage access to your document by setting up a password so that only authorized parties can access it.
We understand that trying new technology, especially AI-powered features, might seem risky and overwhelming. But be confident, we take the protection of our clients seriously and comply with the set data regulation frameworks across a variety of industries.
We’ve made using pdfFiller not only easy and secure, but we also provided it with an array of features that go beyond what you'd usually expect from a regular editor.
Register now and take your editing processes to a whole different level!

Questions & answers

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
Place the mouse where you want to put the fill-in form field. Click the "Developer" tab, then select "Design Mode." Then, click the "Content Control" buttons to insert content controls like drop-down menus or a date picker. Click the "Design Mode" button again when you're finished to activate the form.
0:20 2:08 MS Word how to add fillable line - YouTube YouTube Start of suggested clip End of suggested clip You will see the it breaks the line. So what you need to do is highlight all the line you createMoreYou will see the it breaks the line. So what you need to do is highlight all the line you create then add this one add underscore an underline click that to add underline. But if you make it larger.
Launch the AI assistant. Select the Add fillable fields to feature. Review the changes you made using our artificial intelligence tools and modify your work as you want. Save changes in your document by keeping it in your document history or download it on your device.
In the document, click where you want to add the control. On the Developer tab, under Form Controls, select Text Box, Check Box, or Combo Box. To set specific properties for the control, select Options, and then configure the properties that you want.
To create a fillable Word document that is not editable, you can use the "Developer" tab in Microsoft Word to add form controls such as text boxes, drop-down lists, and checkboxes. After adding these form controls, you can protect the document to allow only form filling and not editing.
In the document, click where you want to add the control. On the Developer tab, under Form Controls, select Text Box, Check Box, or Combo Box. To set specific properties for the control, select Options, and then configure the properties that you want.

All-in-one PDF editor that delivers more

Create and edit PDFs
Fill out forms
Collect data & electronic signatures
Request payments
Share documents via a link, QR code, SMS, or website button
Save reusable templates
Manage documents online
Convert files
Store documents in an unlimited cloud storage
Collaborate efficiently
Centralize access to team assets
Get documents in pdfFiller’s online library
Handle PDFs on mobile devices
Apply custom branding