Sign PDF Online

Fill a PDF with text, dates, checkmarks, and your own drawn or uploaded signature. Everything runs locally in your browser, without signup, watermark, paid e-signature APIs, identity checks, certificates, or document storage.

Browser-native

PDF bytes stay on your device.

No watermark

Export a clean edited PDF.

No e-sign API

No paid signing workflow.

Quality preserved

Pages are not rasterized.

Upload a PDF to preview pages and place annotations.

How to fill and sign a PDF

  1. 1Choose a PDF from your device.
  2. 2Add text, dates, checkmarks, or a drawn or uploaded signature where needed.
  3. 3Review the annotations on the PDF preview.
  4. 4Export the edited PDF locally in your browser.

Related PDF tools

Flatten PDFFinalize fields, markups, and visible signatures after editing. Unlock PDFRemove a known open password before filling your own PDF. Add Page Numbers to PDFNumber document pages before sharing or filing. Watermark PDFStamp draft, confidential, or approval marks onto pages. PDF MergerCombine multiple PDFs before filling and signing. PDF SplitterExtract only the pages you need to fill. Crop PDFTrim scanner borders or excess margins. Remove PDF MetadataStrip common document metadata before sharing.

Frequently asked questions

Is this a legally managed e-signature workflow?

No. This is a practical self-sign and PDF filling utility. It does not send signature requests, verify identity, issue certificates, or manage signing evidence.

Are my PDF or signature uploaded to Convertr?

No. The MVP runs in your browser with pdf.js and pdf-lib. PDF bytes, document text, filenames, form values, signature image data, and annotation coordinates are not sent to Convertr analytics.

Does signing rasterize or reduce PDF quality?

No. The export writes annotations onto the existing PDF pages with pdf-lib. It does not rasterize pages, downsample images, reduce resolution, or add a watermark.

Can I add dates and checkmarks too?

Yes. Choose Text, Date, Checkmark, or Signature, then click the page preview where the mark should appear.

What if my PDF is encrypted or malformed?

Browser libraries may reject encrypted, malformed, or unusual PDFs. Unlock the PDF first if you know the password and are authorized to modify it.