Firmar PDF

Dibuja tu firma y colócala donde quieras.

Suelta tu archivo aquí

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Formatos: PDF

Página

Posición

Dibuja tu firma

Gratis · Sin registro · En la mayoría de herramientas tu archivo no sale de tu dispositivo

Esta herramienta funciona completamente en tu navegador: tu archivo nunca se sube.

Cómo funciona

Subir

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Preguntas frecuentes

Is Firmar PDF free?

Yes. Firmar PDF is completely free with no sign-up, no watermark and no daily limit. There is no paid tier — every tool on iAdorePDF is free to use as often as you like.

Is Firmar PDF safe and private?

Yes. Firmar PDF runs entirely inside your browser, so your file is never uploaded to any server. Nothing leaves your device, which makes it safe for confidential documents.

Do I need to install any software?

No. Firmar PDF works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.

Does Firmar PDF work on a phone?

Yes. Firmar PDF is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.

Is an electronic signature made here legally valid?

A drawn signature placed on a PDF is widely accepted for everyday agreements in many countries, but rules differ by jurisdiction and document type. For contracts with strict legal requirements, check what your local law demands.

How do I use Firmar PDF?

Open the page, drop your file into the upload box (or tap Select file), choose your options, then press the start button. Your result downloads straight to your device.

Is there a file size limit?

There is no server limit because the work happens on your own device. The practical ceiling is your device memory; files up to about 100 MB are comfortable on most phones and much larger on a computer.

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