Free online PDF tool

Fill and sign a PDF online

Upload your PDF and start immediately. Fill existing form fields or add text, dates, checkmarks, drawings, signatures, and initials exactly where they belong.

Fill & Sign workspace Open full screen

How it works

  1. Upload one PDF.
  2. Fill existing fields or add text, dates, marks, drawings, signatures, and initials.
  3. Review each page and download the completed PDF.

Your document stays temporary. Files are uploaded over HTTPS so SuperTool can prepare your download. Working copies and results are removed with the live session; do not upload a document you are not authorized to process.

Frequently asked questions

What if my PDF does not have fillable fields?

Add free-position text, dates, checkmarks, X marks, drawings, signatures, or initials anywhere on the page.

Can I use it on my phone?

Yes. The editor supports narrow screens, touch placement, page navigation, zoom, and download.

Can I use an encrypted PDF?

Save an unlocked copy first. The editor rejects encrypted PDFs rather than retaining or transmitting a password.

I only need a signature. Is there a simpler tool?

Yes. Use Sign a PDF for a focused signature-only workflow.