Create a legally-binding electronic signature and add it to contracts, agreements, PDF forms, and other documents – regardless of your location. Collect and track signatures with ease using any device.
Drop document here to upload
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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
Note: Integration described on this webpage may temporarily not be available.
Last updated on
Sep 20, 2025
Upload a document
Generate your customized signature
Adjust the size and placement of your signature
Download, share, print, or fax your signed document
Every eSignature tool you need – inside a powerful PDF software
eSignature solution
Document tracking
Enhanced productivity
Custom branding
Security & compliance
eSign documents and collect signatures
Easily fill, edit, and sign your PDF documents in a single application, on any device.
Type, draw, or use a signature converter to create an eSignature from a picture of your handwritten autograph.
Create fillable PDFs and send them for signature to one or multiple recipients.
Set signer roles and customize a signing order.
Get visibility into the signing process
Receive instant alerts once signatures are in place.
Specify CC’d recipients and set actions upon document completion.
Monitor changes in your documents with audit trails.
Speed up your approval workflows
Send documents for signature faster by sharing them via short links.
Simplify data and signature collection by posting fillable PDF forms online.
Collect payments along with signed documents.
Showcase your branding when requesting signatures
Display your logo on signature invites, user notifications, and in the eSignature editor.
Customize an email message for your eSignature invites.
Redirect signers to your website once they complete your document.
Maintain industry-leading security and compliance
Authenticate signers via a password.
Make your document workflows compliant with industry-specific regulations, including HIPAA.
Secure the authenticity of a document with a unique ID.
Set an expiration date for your document.
Join the world’s largest companies
Employees at these companies use our products.
How to Add a Signature to PDF (and Send it Out for Signature)
Watch the video guide to learn more about pdfFiller's online Signature feature
pdfFiller scores top ratings in multiple categories on G2
4.6/5
— from 710 reviews
5.0
Sloppy Documents No More!
It's extremely easy to use and affordable. Worth every penny for our Real Estate team. We go through a ton of documents and PDFfiller keeps us looking professional and not sloppy like some agents we do business with. Professionalism is everything in our line of work.
The ease of use and the finished product! We get contracts from agents who *don't* use PDFfiller and it's hard to take them seriously. Their documents look very unprofessional.
Nothing. It's easy to use and produces perfect results every time. PDFfiller enables us to take pride in our work- which is a direct reflection of our brand as a Real Estate team.
Mariah W.
5.0
What do you like best?
I enjoy PDF Filler because it is not as expensive as Adobe Pro, and it allows me to quickly edit, sign, and return any PDF document I would normally need to print out, and scan back to myself.
What do you dislike?
One dislike I have is the fact I need to download everything. It would be really helpful if everything would be automatically saved on something like a onedrive (cloud storage), where it would be automatically saved. This way, I can have a local folder on my computer without needing to go into the webpage and click download
What problems is the product solving and how is that benefiting you?
I no longer need to waste paper to download a form, and fill it out. Normally I would need to do this, then scan it back to myself. now I can upload, edit, and sign the form which saves a lot of time.
Brandon Hogg
Sign any document using pdfFiller’s eSignature service without hassle
Add your virtual signature in just a few simple steps – without a scanner or printer.
Upload
Upload your document to pdfFiller and open it in the editor.
Sign
Generate and save your electronic signature using the method you find most convenient.
Tweak
Resize your signature and adjust its placement on a document.
Retrieve
Save a signed, printable document on your device in the format you need or share it via email, a link, or SMS. You can also instantly export the document to the cloud.
Upload document
Why choose pdfFiller for eSignature and PDF editing?
Cross-platform solution
Upload your document to pdfFiller and open it in the editor.
Unlimited document storage
Generate and save your electronic signature using the method you find most convenient.
Widely recognized ease of use
Resize your signature and adjust its placement on a document.
Reusable templates & forms library
Save a signed, printable document on your device in the format you need or share it via email, a link, or SMS. You can also instantly export the document to the cloud.
The benefits of electronic signatures
Bid farewell to pens, printers, and paper forms.
Efficiency
Enjoy quick document signing and sending and reclaim hours spent on paperwork.
Accessibility
Sign documents from anywhere in the world. Speed up business transactions and close deals even while on the go.
Cost savings
Eliminate the need for paper, printing, scanning, and postage to significantly cut your operational costs.
Security
Protect your transactions with advanced encryption and audit trails. Electronic signatures ensure a higher level of security than traditional signatures.
Legality
Electronic signatures are legally recognized in most countries around the world, providing the same legal standing as a handwritten signature.
Sustainability
By eliminating the need for paper, electronic signatures contribute to environmental sustainability.
Enjoy straightforward eSignature workflows without compromising data security
Regulates the use and holding of personal data belonging to EU residents.
SOC 2 Type II Certified
Guarantees the security of your data & the privacy of your clients.
PCI DSS certification
Safeguards credit/debit card data for every monetary transaction a customer makes.
HIPAA compliance
Protects the private health information of your patients.
CCPA compliance
Enhances the protection of personal data and the privacy of California residents.
Lock Required Field PDF Feature
The Lock Required Field PDF feature provides users with the flexibility to control form submission in PDF documents. This feature ensures critical fields are completed before a user can submit a form. By implementing this functionality, you increase the integrity of the information collected.
Key Features
Set mandatory fields that must be filled out before submission
Prevent form submission if required fields are blank
Enhance data accuracy and validity
Easy integration with existing PDF forms
User-friendly interface for setting field requirements
Potential Use Cases and Benefits
Ideal for businesses collecting customer information, ensuring that all necessary data is gathered
Useful for compliance forms that require mandatory disclosures before submission
Supports educational institutions in gathering complete application details
Enhances customer experience by reducing back-and-forth for missing information
This feature addresses the common challenge of incomplete submissions. By locking required fields, you minimize errors and streamline the collection process. With accurate data in hand, you can make informed decisions, improve efficiency, and enhance overall service delivery.
Instructions and Help about Lock Required Field Pdf For Free
Lock Required Field PDF: full-featured PDF editor
The Portable Document Format or PDF is a popular file format used for business documents because you can access them from any device. You can open it on any computer or phone — it will appear same.
Data security is one of the main reasons why do professionals in business choose PDF files to share and store data. That’s why it is essential to get a secure editor, especially when working online. PDF files are not only password-protected, but analytics provided by an editing service allows document owners to identify those who’ve accessed their documents and track any and all potential security breaches.
pdfFiller is an online document creating and editing tool that lets you create, modify, sign, and send PDF directly from your internet browser. Thanks to the numerous integrations with the most popular CRM tools, you can upload an information from any system and continue where you left off. Once you’ve finished editing a document, send it to recipients to complete and get a notification when it’s completed.
Use powerful editing tools to type in text, annotate and highlight. Add fillable fields and send for signing. Change a page order. Add images into your PDF and edit its layout. Ask other people to fill out the document and request an attachment. Once a document is completed, download it to your device or save it to the third-party integration cloud.
Get your documents completed in four simple steps:
01
Browse for your document through the pdfFiller's uploader.
02
To edit the content of your document, click the 'Tools' tab and follow the instructions.
03
Add input fields if you need any: pdfFiller supports text, checkboxes, radio buttons, dropdown lists etc.
04
When finished editing, click the 'Done' button and save or email your document.
How to Use the Lock Required Field Pdf Feature
The Lock Required Field Pdf feature in pdfFiller allows you to lock specific fields in a PDF document, ensuring that they cannot be edited or modified by anyone else. This feature is especially useful when you need to share a document with others but want to restrict certain fields from being changed.
01
Open the PDF document in pdfFiller.
02
Click on the 'Lock' icon in the toolbar.
03
Select the field(s) you want to lock by clicking on them.
04
Once the field(s) are selected, click on the 'Lock' button in the pop-up window.
05
A confirmation message will appear, indicating that the field(s) have been locked successfully.
06
Save the document to apply the changes.
By following these simple steps, you can easily lock required fields in your PDF document using the Lock Required Field Pdf feature in pdfFiller. This feature provides an added layer of security and ensures that your important information remains intact and unaltered.
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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.
1 Answer. You can apply password security to your form: Bring up the document properties dialog (Ctrl-D or Cmd-D), then go to the “Security” tab and select to add “Password Security”. This will bring you to this dialog: Select to add a password to “Restrict editing...” and then select the restrictions you want to apply ...
How do I lock certain fields in PDF?
Check Advanced>Security>Show Security Properties for the list of what you can specifically restrict on an individual PDF. You can specifically Restrict 'Filling of Form Fields' on the PDF, and have the security model be a password. The rep knows the password that makes the form editable, but the client doesn't.
How do I lock a fillable field in PDF?
1 Answer. You can apply password security to your form: Bring up the document properties dialog (Ctrl-D or Cmd-D), then go to the “Security” tab and select to add “Password Security”. This will bring you to this dialog: Select to add a password to “Restrict editing...” and then select the restrictions you want to apply ...
How do you lock objects in PDF?
Lock and unlock objects Or, right-click the object and select Lock from the context menu. On Windows, right-click the object and select Lock from the context menu.
Ready to try pdfFiller's? Lock Required Field Pdf
Upload a document and create your digital autograph now.
