Monstera PDF Editor

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Monstera PDF Editor is a free, open-source PDF editing application for Windows 10 and 11, developed by Tenslor for professionals, businesses, and individuals who need comprehensive document management capabilities without subscription costs. The application provides more than 150 professional tools for editing existing PDF text and objects, creating and filling forms, permanently redacting sensitive information, adding signatures, organizing pages, comparing documents, and converting files between formats. Monstera also includes OCR in 14 languages and an integrated AI Assistant supporting 10 AI providers for document analysis, summarization, and information extraction. Designed with privacy and security in mind, Monstera processes standard PDF operations locally and uses Windows AppContainer isolation to help protect the system when handling documents. The application requires no subscriptions, accounts, or watermarks. It is licensed under GNU AGPL-3.0, with publicly available source code on GitHub. Monstera PDF Editor is available exclusively through the Microsoft Store.