Switch from SmallPDF to pdfFiller for a Modify Digital Signature PDF Solution For Free

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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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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Video Review on How to Modify Digital Signature PDF - SmallPDF

Our user reviews speak for themselves

Read more or give pdfFiller a try to experience the benefits for yourself
5.0
What do you like best?
completing documents accurately and neatly
What do you dislike?
some documents not being available through PDF
What problems are you solving with the product? What benefits have you realized?
The time it takes completing documents
User in Construction
4.0
had a few problems with text had a few problems with text, once I got hang of it, it was OK, tried to add "auto-fill" for signature of doc, having troubles.
Jay Keating

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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.
What if I have more questions?
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If you received a PDF digitally signed by others, you can sign it, but can't edit it. While signing a PDF, if the signer chooses to lock the document after signing, the document becomes read-only for everyone, including the signer.
Upload PDFs to Make it Writable. Upload the PDF files you want to make it writable to PDF element. Select the Writable File Format. Click on the “Convert” tab, you will see there are many options for conversion. Convert PDF to Writable File.
Simply upload the PDF, click on the signature field, and select the option to delete the signature. Smallpdf's drop-down list of tools also includes other PDF management services, making it a comprehensive platform for PDF-free editing.
If a digital signature isn't valid, there can be many causes. For example, the sender's certificate may have expired, it may have been revoked by the certificate authority (CA), or the server that verifies the certificate might be unavailable. Notify the message sender of the problem.
How to Edit a Signed PDF Open your PDF in PDF Pro. Press the Print button or [ctrl + p] from your keyboard. Select PDF Pro Virtual Printer from the dropdown (if not default). Press Ok. Name your PDF, then press Save. Make your edits (access editing tools from the Edit tab or the Edit section of the Home tab.
5 Steps for Validating Digital Signatures In a PDF Open the digitally signed PDF that you need to validate using Power PDF. Locate the digital signature object within the document. Right click or command-click on the signature object. Select "Verify Signature" from the context menu.
If you still can't sign PDF, check your software's version history. You may be using an old version of your PDF reader that doesn't support e-signatures, even though the newer versions do. Check your PDF software's settings for an auto-update function or visit the developer's website to download the latest version.
Open the PDF document and select Sign from the top tools bar. Alternatively, from the All tools menu, select Fill & Sign. Create your signature and initials if not already done.
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