Welcome to Nitro’s Free PDF Reader

A free PDF reader for Windows only*

Descárguelo de forma gratuita para crear, revisar, firmar y compartir archivos PDF.

Download Nitro's Free PDF Reader

What can Nitro’s free PDF Reader do for you?

Nitro's free PDF reader is the #1 alternative to Adobe Acrobat Reader. Learn more about what makes it the best free PDF reader on the market.


  • Create PDFs from virtually any Windows application and from over 300 file formats.
  • Simply drag-and-drop files to instantly create a document.
  • Customize your PDFs with tools like custom colors, font embedding, page size, orientation, and output quality. Or, keep it simple with preset options.


  • Add comments, address feedback, highlight, underline, or strike-out text to make collaboration a breeze.
  • Quickly view PDFs, add text, and collaborate—without the learning curve—thanks to the intuitive user interface.
  • When you open a PDF with digital signatures, comments, or bookmarks, the review pane will automatically display, helping you know what to review first.


  • QuickSign any document in seconds without leaving your desk.
  • Simply scan or photograph your signature to create your own unique signature profile.
  • Password-protect your documents to keep signatures safe and secure.


  • All PDFs created with Nitro Reader are 100% compatible with other readers—so you can securely share documents with anyone, anywhere, at any time.
  • Sus compañeros también pueden crear diversos perfiles de QuickSign, lo que facilita enviar y devolver muchas veces el archivo entre equipos o empresas.

Nitro products are feature-rich and extremely user friendly, and we saw a significant impact on user productivity.

—Aiden Curran
IT Service Delivery Manager (Europe 1)

Looking to do more with PDFs? Try Nitro Pro 11 instead!

Scan, edit, convert, and secure your documents like a pro. Say hello to premier PDF performance (with a minor price tag).

Nitro's Free PDF Reader vs. Nitro Pro

Free PDF Reader

Nitro Pro

Ver, imprimir, enviar por correo electrónico y compartir archivos PDF

Convertir archivos a partir de PDF y Word, Excel y PowerPoint de Microsoft, y hacia estos formatos

Marcar, subrayar, tachar y añadir notas en el texto y las páginas

Obtener PDF escaneados que permiten búsquedas y modificaciones con la tecnología OCR

Edit, insert, delete, crop, replace, and reorder pages

Combinar múltiples archivos y tipos de archivo en un solo PDF

Censurar información confidencial de forma permanente y segura

Añadir la firma electrónica a archivos, colaborar en ellos y compartirlos de forma fluida con la integración que ofrece Nitro Cloud

Get the Free Reader » Try Nitro Pro for free »

Need to edit, convert, or combine files?

Learn more about PDF editing »

Swap Nitro Reader for a Free Nitro Pro Trial

With our free 14-day trial of Nitro Pro, you'll be able to read, create, edit, convert, sign, and share PDFs-plus much more.

Once the 14 days are up, you'll still be able to create, view, and share PDFs for free. (Don't worry, this isn't a trap.)

Start Your Trial » No credit card required.