Open PDF Studio
Open PDF Studio is a PDF editor and annotator for viewing, marking up, measuring, and organizing PDF documents on macOS.
What is Open PDF Studio?
Open PDF Studio is a desktop PDF editor and annotation app for working with PDF documents, especially technical drawings and other vector-heavy files. It helps users review documents, add comments and markups, measure distances and areas to scale, fill forms, and manage pages in a single workspace. The app includes a broad set of annotation tools such as highlights, shapes, text boxes, stamps, signatures, and image insertion, along with page operations like merge, reorder, extract, rotate, and replace. It also supports redaction, watermarks, headers and footers, image export, printing, and multi-tab document sessions. Open PDF Studio is published by the OpenAEC Foundation ecosystem and is available for macOS alongside other platforms, making it useful for document review, construction drawing workflows, and general PDF editing tasks.
Key features
- Annotate PDFs with highlights, shapes, text boxes, callouts, notes, stamps, and freehand drawing.
- Measure distance, area, and perimeter on drawings with scale calibration and object snapping.
- Fill interactive PDF forms and create form fields such as checkboxes, text fields, and radio buttons.
- Manage pages by inserting, deleting, extracting, replacing, rotating, reordering, and merging PDFs.
- Apply redactions to permanently remove sensitive content from documents.
- Add reusable signatures, watermarks, headers, and footers to PDF files.
- Export pages as PNG or JPEG and print with preview, scaling, and page-range controls.
- Work with multiple PDFs in tabs and restore saved workspace sessions.
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Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
Open PDF Studio is a legitimate PDF editing app. Access to your files is normal for its purpose because it needs to open, edit, save, export, and print documents you choose. If you use features such as redaction or document editing, review the saved result before sharing it so you do not accidentally remove or expose the wrong content. Keep the app only if you use it for PDF work, and store sensitive documents carefully like you would with any editor.
Recommendation: Keep Open PDF Studio if you edit, annotate, measure, or review PDFs on your Mac. If you no longer use it, you can remove it without affecting macOS, though you may lose its saved settings and any app-specific workspace history.
Common paths
/Applications/Open PDF Studio.app
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