Can you recommend a form builder with PDF support?

Yes — here are a few solid form builders that support PDF-related workflows, depending on what you mean by “PDF support”:

Best all-around options

• Jotform
  Strong choice if you want to build forms and generate PDFs from submissions, or let users upload PDFs. It also supports PDF form filling and document generation.

• Cognito Forms
  Good for form-to-PDF generation, especially for applications, invoices, waivers, and structured documents. More advanced than many basic form tools.

• Formstack
  Great for businesses that need PDF generation, workflow automation, and compliance. Good if you need to route submissions and create documents.

Simpler / lighter options

• Typeform
  Excellent for user experience, but PDF support is more limited and often depends on integrations.

• Google Forms + add-ons
  Can work if you only need basic forms and then export/convert responses, but it’s not ideal for native PDF workflows.

If you specifically need fillable PDFs

• Adobe Acrobat / Adobe Forms
  Best if you want to create or work directly with fillable PDF forms rather than web forms.

Quick recommendation

• If you want the easiest “web form + PDF generation” combo: Jotform
• If you need more structured business documents: Cognito Forms
• If you need enterprise workflows: Formstack

If you want, I can also recommend the best option based on your use case — e.g. invoice forms, intake forms, applications, waivers, or fillable PDFs.