Switch from SmallPDF to pdfFiller for a Add Signature PDF Solution Gratuito

Use pdfFiller instead of SmallPDF to fill out forms and edit PDF documents online. Get a comprehensive PDF toolkit at the most competitive price.
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Fill out, edit, or eSign your PDF hassle-free
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Switch from SmallPDF 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 SmallPDF

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.

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Save up to 40 hours per month with paper-free processes
Make quick changes to your PDFs even while on the go
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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
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Our user reviews speak for themselves

Read more or give pdfFiller a try to experience the benefits for yourself
4.0
I had some trouble learning to use it and directions aren't consistent. Your Help area tends to be more sales pitch on what can be done in a field with no directions. I'm very grateful for availability of the service though I'll drop it once I have my house sold in a few months
Dayna B
5.0
What do you like best?
I have tried many signing apps and software and this one is by far the best in terms of ease, flexibility and speedy workflow.
What do you dislike?
Maybe it is just something I am not figuring out...but the orange box prompts on some documents get more in the way sometimes than help.
Recommendations to others considering the product:
Keep up the good work!
What problems are you solving with the product? What benefits have you realized?
Signing of all contracts, invoices, and P&Ls. I love the ease of storing documents I most commonly use to transmit has and easy to clients with a simply date update.
Christopher Emerson

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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
Sign PDFs for free with eSignature. Create a free eSignature account. Select “Start now”. Upload a PDF document that you want to sign. Check the “I'm the only signer” box. Click “Sign.” Drag and drop your signature from the left-hand navigation panel. Click Finish.
To add a digital signature to a PDF in Acrobat, users can take the following steps: Open the PDF document in Adobe Acrobat. Click on the Tools tab in the top menu bar and select Fill & Sign. Click Sign Yourself > Add Signature. Drag and resize the signature so it appropriately fits in the document.
After uploading your document and signing in to Acrobat online, you can add your signature to a PDF by following these steps: Select Add signature in the Sign panel. In the signature panel that opens, click Image, then Select image to browse for an image of your handwritten signature.
Questions? We have answers. Select Add signature in the Sign panel. In the signature panel that opens, click Image, then Select image to browse for an image of your handwritten signature. Drag your new electronic signature into a signature field or anywhere on the PDF. Download or share your signed document.
Steps to sign a PDF Open the PDF document or form that you want to sign. Click the Sign icon in the toolbar. The Fill & Sign tool is displayed. The form fields are detected automatically. Click the Sign icon in the toolbar, and then choose whether you want to add your signature or just initials.
How to sign a PDF Create a free eSignature account. Select “Start now”. Upload a PDF document that you want to sign. Check the “I'm the only signer” box. Click “Sign.” Drag and drop your signature from the left-hand navigation panel. Click Finish.
See how to sign a PDF Open the PDF document and select Sign from the top tools bar. Create your signature and initials if not already done. From the Sign panel, select your signature, move over to the field where you want to add it, and then click to place the signature. The form fields are detected automatically.
Using an electronic signature to sign a PDF or fill out a PDF form allows you to sign remotely, on any device.
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