PDF tools for freelancers: invoices, quotes, and contracts

1 min read·25 July 2026

As a freelancer you work daily with invoices, quotes, and contracts as PDFs. PDFrust helps you present them professionally, sign them, and secure them — all free and without a subscription.

Sign invoices

Add your signature to an invoice PDF via the signature tool. Draw on screen or upload a photo of your signature as PNG. Place it in the right spot and download the signed version.

Merge quotes with attachments

Your quote consists of multiple parts: the quote itself, a product overview, a reference project list. Merge them into one clear PDF document using the merge tool.

Sign PDF

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Secure contracts

Sending a signed contract? You can secure it so the recipient cannot change the content. Use the flatten tool to lock the form, so the filled-in data is permanently set.

Correct invoice format for email

Large PDFs with logos or images can be too large for email. Compress the invoice PDF via PDFrust before sending. You can also adjust the metadata so the PDF title matches the invoice number.