Are eSignatures legally binding?

Yes, electronic signatures are legally binding in most countries worldwide, recognized under major regulations including the ESIGN Act in the United States, eIDAS in the European Union, and similar laws across other regions. When properly executed with authentication measures and audit trails, eSignatures carry the same legal weight as handwritten signatures.

How secure is my document after signing?

Your document is well-secured after signing. pdf.net uses HTTPS encryption to keep your signed documents private and protected.

Are there any limitations on the file size?

Yes, there is a 500 MB file size limit to the documents you can upload to pdf.net. If you want to add your electronic signature to PDF files that are larger than 500 MB, we recommend compressing the document first to reduce its size.

Do I need to install any software to use the signature tool?

No, you don’t need to install any software to use our PDF signature tool; you can simply sign PDFs online by uploading your documents and adding your signature.

How do I import my signature into a PDF?

To import your signature into a PDF, simply upload your document to pdf.net, then choose how you’d like to add your signature—draw it with your mouse or touchscreen, type it out, or upload an image of your handwritten signature.

What types of documents can I sign?

You can sign contracts, agreements, forms, invoices, applications, consent forms, and many other types of PDF documents.

Can I sign password-protected PDFs?

If you know the password and the document allows editing, you may be able to sign the PDF. Restrictions depend on the document’s security settings.

Can I upload an image of my handwritten signature?

Yes. If you already have a scanned signature image, you can upload it to your PDF document.

Can I add multiple signatures to a PDF?

No, you can’t add multiple signatures to a PDF at once. If you want to add multiple signatures, you have to repeat the process for adding PDF signatures.

Can I request signatures from others?

Yes, pdf.net lets you request signatures from other people. Simply upload your document, add the required signature fields, and share it with the recipients via email or link. They can sign online from any device, no account or software needed.

Can I use pdf.net on a Mac, Linux, or smartphone?

Yes, you can use pdf.net on a Mac, Linux, or smartphone to sign PDF documents. Our online PDF signer offers the same functionality, regardless of the device type.

What file formats can I sign?

Sign PDF files online by typing, drawing, or uploading a signature. pdf.net also accepts Word documents (DOC, DOCX) and JPG and PNG images, and your file opens in the editor.

Sign PDFs Online Easily

Add your signature to any PDF document in seconds. Our handy PDF signature tool works on any device—no software downloads needed.

Supports PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, JPG, PNG, HEIC, HEIF

Files stay private

I was able to get my documents signed and got it on time and I did it all for free thank you so much.

Laqueen JordanTrustpilot review

When to Use Our PDF Signing Tool

Sign PDF without printing

Return contracts in minutes from wherever you are—no scanner, no delays.

Add a digital signature online

Add a signature to a PDF online—just open, sign, and send.

Sign contracts on mobile

Sign a contract PDF online or draw a signature on mobile; works on any device.

Fill and sign PDFs without an account

Fill and sign a PDF without registering—ideal for forms you need back fast.

All PDF tools in one place

No installs, no app-switching — works on any device

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Convert JPG to PDF

Merge JPEG photos into a single PDF file without losing quality.

Convert PNG to PDF

Combine multiple PNG images into one PDF. Resolution maintained.

Convert PDF to JPG

Turn PDF pages into separate JPEG images. Ready to share or upload.

PDF to Excel

Turn PDF tables into editable spreadsheets ready to use in Excel or Google Sheets.

Convert PDF to PNG

Split PDF pages into separate PNGs. Full resolution preserved.

Convert Markdown to PDF

Paste or upload your .md file and get a formatted PDF in seconds. Tables and code blocks included.

Convert Excel to PDF

Turn XLS & XLSX into a clean, shareable PDF. Formatting intact.

PDF to CSV

Extract table data from PDFs into clean CSV files ready for spreadsheets and data analysis.

PDF to PowerPoint

Get editable PPT & PPTX slides. Keep fonts & layout.

Convert HEIC to PDF

Turn iPhone HEIC photos into a shareable PDF. Opens on any device.

Convert PowerPoint to PDF

Turn PPT & PPTX into a share-ready PDF. Opens on any device.

Bank Statement to Excel

Convert PDF bank statements to editable Excel or CSV files for accounting and analysis.

Change Text

Edit PDF text directly. Change font, size, color.

Compress

Reduce PDF file size with 3 compression levels.

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Spot every change between two PDFs. View side by side or overlay.

Add Image

Add logos, photos & graphics to PDFs. Adjust size and position.

Split File

Split PDF into multiple files. Choose any page to divide.

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Drag & drop to reorganize. Delete, duplicate, rotate pages.

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Number pages automatically. Choose position, format, margins.

Annotate

Mark up PDFs: draw, highlight, erase. Multiple colors & line widths.

Rotate Pages

Adjust PDF orientation easily. Choose single, multiple, or all pages.

Bates Numbering

Add Bates numbers automatically. Choose prefix, suffix, and numbering style.

Extract Pages

Select the pages you need and save them as a new PDF.

Unlock PDF

Remove passwords and restrictions with just a few clicks.

Protect PDF

Secure PDF from unauthorized use with a password.

Chat with PDF

Ask AI any questions about your PDF.

PDF Summarizer

Summarize PDFs into key points with AI.

Generate PDF

Describe a doc you need and get a formatted PDF.

How to Sign a PDF File

1
Upload your file
2
Add your electronic signature to it
3
Download the signed file

Why people prefer pdf.net

Simple and easy for daily use
Our online PDF editor features a clean, intuitive, and user-friendly interface designed for amateurs and professionals alike. You can navigate it with ease and edit your PDF file, even if you’ve never done it before.
All‑in‑one PDF editor
Our editor offers a robust and comprehensive set of features that allow you to customize your documents, merge them, sign them, and much more. No need to transfer your files between several applications anymore.
Keeping formatting without issues
No more messy documents and inconsistent formatting across multiple systems or devices. Our online PDF editor is cross-platform compatible and maintains uniformity whether you’re using a PC, MacOS, smartphone, or tablet.

People all over the world trust pdf.net to edit their docs

Very easy to navigate through and use.

Nick ApplebyTrustpilot review

Very easy to navigate through and use.

Nick ApplebyTrustpilot review

The best part I love about this platform is its ability to collaborate and share files on this platform. The security of the files is also enhanced on this platform by its capability to add password which secures the entire content of the files.

Konjengbam Mitindra SinghG2 review

I had a document that I had to send to someone that I couldn't convert and I was able to thanks to pdf.net, I got my certificate. I'll be using them in the future if I need it!

Jamie Sasser-DroneTrustpilot review

Software works very well. Easy to use and renders quickly. A MUST have working with PDF documents.

Fabio TagliasacchiTrustpilot review

Frequently asked questions

Are eSignatures legally binding?: Yes, electronic signatures are legally binding in most countries worldwide, recognized under major regulations including the ESIGN Act in the United States, eIDAS in the European Union, and similar laws across other regions. When properly executed with authentication measures and audit trails, eSignatures carry the same legal weight as handwritten signatures.
How secure is my document after signing?: Your document is well-secured after signing. pdf.net uses HTTPS encryption to keep your signed documents private and protected.
Are there any limitations on the file size?: Yes, there is a 500 MB file size limit to the documents you can upload to pdf.net. If you want to add your electronic signature to PDF files that are larger than 500 MB, we recommend compressing the document first to reduce its size.
Do I need to install any software to use the signature tool?: No, you don’t need to install any software to use our PDF signature tool; you can simply sign PDFs online by uploading your documents and adding your signature.
How do I import my signature into a PDF?: To import your signature into a PDF, simply upload your document to pdf.net, then choose how you’d like to add your signature—draw it with your mouse or touchscreen, type it out, or upload an image of your handwritten signature.
What types of documents can I sign?: You can sign contracts, agreements, forms, invoices, applications, consent forms, and many other types of PDF documents.
Can I sign password-protected PDFs?: If you know the password and the document allows editing, you may be able to sign the PDF. Restrictions depend on the document’s security settings.
Can I upload an image of my handwritten signature?: Yes. If you already have a scanned signature image, you can upload it to your PDF document.
Can I add multiple signatures to a PDF?: No, you can’t add multiple signatures to a PDF at once. If you want to add multiple signatures, you have to repeat the process for adding PDF signatures.
Can I request signatures from others?: Yes, pdf.net lets you request signatures from other people. Simply upload your document, add the required signature fields, and share it with the recipients via email or link. They can sign online from any device, no account or software needed.
Can I use pdf.net on a Mac, Linux, or smartphone?: Yes, you can use pdf.net on a Mac, Linux, or smartphone to sign PDF documents. Our online PDF signer offers the same functionality, regardless of the device type.
What file formats can I sign?: Sign PDF files online by typing, drawing, or uploading a signature. pdf.net also accepts Word documents (DOC, DOCX) and JPG and PNG images, and your file opens in the editor.