Agregar Firma a PDF
Carga un PDF, dibuja, escribe o sube una firma visual, posiciónala en una página y descarga un PDF con un sello de firma visible. Esto no es una firma digital criptográfica.
PDF document
Draw inside the box with mouse or touch.
Placement preview
This adds a visual signature representation only. It is not a certificate-based digital signature.
Drop a PDF to choose a page and place the signature.
How to add a visual signature to a PDF
Load a PDF, create a drawn, typed, or uploaded visual signature, choose a page and position, then download a PDF with a visible signature stamp.
Visual signature only
This tool adds a visible representation of a signature. It does not apply a cryptographic digital signature, certificate signature, qualified signature, or identity proof.
Local PDF editing
For compatible, unencrypted PDFs, the browser appends a stamp annotation with a custom appearance stream. The original PDF bytes stay on your device.
Compatibility notes
- Encrypted PDFs are not supported.
- Some PDFs with compressed or indirect page annotation structures may not be editable without a full PDF library.
- PNG uploads are embedded through a browser-generated image; transparent pixels may render on a light background.
Processing notes
The PDF and signature are processed locally in your browser and are never uploaded.
Preguntas frecuentes
Is this a digital signature?
No. It only adds a visual signature mark and does not use certificates or cryptographic signing.
What PDFs are supported?
The local editor supports compatible, unencrypted PDFs whose page dictionaries can be inspected in the browser.
Can I add more than one signature?
You can run the downloaded PDF through the tool again to add another visual signature.