Free open-source web software for signing (alone or with others), organizing (merge, sort, rotate, delete, extract pages, ...), editing metadatas or compressing PDFs.




FeatherPDF Editor is described as 'Discover Feather PDF, the ultimate PDF editor that prioritizes your privacy. Enjoy powerful editing features without data collection and gain lifetime access with a one-time payment' and is a PDF Reader in the office & productivity category. There are more than 100 alternatives to FeatherPDF Editor for a variety of platforms, including Windows, Mac, Linux, Web-based and Android apps. The best FeatherPDF Editor alternative is SumatraPDF, which is both free and Open Source. Other great apps like FeatherPDF Editor are Okular, Foxit PDF Reader, Xournal++ and PDF Arranger.
Free open-source web software for signing (alone or with others), organizing (merge, sort, rotate, delete, extract pages, ...), editing metadatas or compressing PDFs.




Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, share, sync, manage, sign, and more.




Solve your documentation problems with a single platform that integrates all document formats, enhances collaboration, and maintains real-time updates.




Comprehensive suite offering eSign, OCR, multi-platform editing, cloud integration, and robust security. Ideal for professional or personal use, facilitating collaboration while protecting content.




Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.




Document Viewer is a highly customizable document viewer for Android, fork of the last GPL version of EBookDroid .


PDFTK Builder is a free graphical interface to for PDFtk, making it much easier to use. It is a easy to use tool to collate (merge), split, encrypt, decrypt, stamp and rotate (only 90°, 180° or 270°) pdf documents.




Nitro offers comprehensive PDF solutions for editing, creating, and converting, alongside OCR and e-signature tools. Supports Mac, Windows, and iOS, providing a user-friendly interface with industry-standard security features. Ideal as an Adobe Acrobat alternative.




Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions.



Read, annotate, and highlight PDFs, fill interactive forms with saved input, underline or strike through text, manage bookmarks, sync files from cloud services, and share documents. Compatible with Preview and Adobe Acrobat annotations, supporting extensive iOS features.




Comprehensive solution for editing, signing, form filling, OCR scanning, commenting, converting, and redacting PDFs, with AI-driven analysis and content extraction, data export to spreadsheets, text-to-speech, seamless use across desktop and mobile, and batch processing.



