Best Free PDF Readers and Editors – Alternatives to Adobe Acrobat

Best Free PDF Readers and Editors in 2025 – Alternatives to Adobe Acrobat

The most famous program for reading the popular PDF format is, of course, Adobe Acrobat – a paid multifunctional application from Adobe Systems. However, not everyone needs advanced features, and many users prefer free PDF readers and editors that are lightweight, fast, and easy to use. In this guide, we review the best free PDF software for Windows, Mac, and Linux in 2025.

What is a PDF File?

A Portable Document Format (PDF) is a universal file format that preserves text, images, hyperlinks, interactive buttons, forms, embedded fonts, and even videos within a single document. PDF files are widely used for sharing reports, eBooks, manuals, contracts, and other digital documents. The advantage of PDFs is that they look the same on any device or operating system.

How to Choose the Best PDF Reader?

Choosing the right PDF viewer depends on your needs. Do you simply need a lightweight PDF reader for quick document viewing, or do you require advanced features such as PDF editing, annotations, or digital signing? Below, we’ve listed the top free PDF readers and editors available in 2025, highlighting their features and benefits.

1. Sumatra PDF

Sumatra PDF is an open-source PDF reader available in both portable and desktop versions. With a tiny 64-bit installer of just 6 MB, Sumatra PDF is one of the fastest PDF viewers on the market. It supports multiple formats including PDF, MOBI, FB2, EPUB, CHM, XPS, and DjVu.

Although Sumatra PDF lacks editing, commenting, or signing capabilities, it excels in speed and simplicity. It supports tabs, multiple viewing modes, and keyboard shortcuts, making it ideal for users who need a minimalistic yet efficient reader.

2. PDF-XChange Editor

PDF-XChange Editor is a powerful and feature-rich alternative to Adobe Acrobat. It allows you to view, create, edit, sign, and annotate PDF documents. One of its standout features is built-in Optical Character Recognition (OCR), which enables you to convert scanned documents into searchable and editable text.

You can add notes, highlight text, insert audio files, and attach documents. The free version includes most features, but saving edited files will include a watermark. To remove watermarks and unlock premium tools, you can upgrade to the paid version.

3. Nitro PDF Reader

Nitro PDF Reader is part of the Nitro Productivity Suite and is free for personal use. It includes essential features such as form filling, digital signing via QuickSign, adding annotations, and converting PDF files to plain text or images. Its clean interface resembles Microsoft Office, making it user-friendly and familiar for Windows users.

4. Foxit Reader

Foxit Reader has long been one of the best alternatives to Adobe Reader. It supports viewing, creating, editing, printing, and exporting/importing PDF files. Known for its fast performance and small size, Foxit Reader offers an intuitive interface with multiple editing tabs.

It supports digital signatures, form processing, and cloud integration via its ConnectedPDF feature, introduced in 2016. It’s ideal for both individuals and businesses looking for a powerful free PDF editor.

5. STDU Viewer

STDU Viewer is a versatile program supporting PDF, DjVu, MOBI, EPUB, FB2, and TXT formats. It’s designed for users who often work with multiple documents simultaneously. It allows tabbed browsing, navigation panels, bookmarks, and page comparison by splitting the screen.

STDU Viewer includes useful features like adjustable brightness and contrast, color inversion to reduce eye strain, and compatibility with touch-screen devices. It also supports printing of most protected PDF files.

6. Evince

Evince is a lightweight open-source PDF viewer initially developed for Linux (GNOME desktop environment), but now available for Windows. It provides a clean, customizable interface with search functions and different viewing modes.

Evince supports autoscrolling for effortless reading, and if OCR data is embedded, users can select and copy text from scanned PDFs.

7. Using Your Web Browser

Modern browsers like Google Chrome, Microsoft Edge, and Firefox have built-in PDF viewers. You can simply drag and drop a PDF file into the browser window to view it. Although browser-based PDF readers lack advanced features such as editing or annotation, they are perfect for quick access.

Browser PDF viewers include basic tools like zooming, searching, printing, and saving, making them a convenient option for everyday tasks.

Conclusion

While Adobe Acrobat remains the industry standard, free PDF readers like Sumatra PDF, Foxit Reader, Nitro PDF, and PDF-XChange Editor provide powerful alternatives for most users. Whether you want a simple viewer or a multifunctional editor with OCR and annotations, there’s a tool for every need. For casual users, a browser-based PDF reader may be all that’s required.