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OpenAEC-Foundation

OpenAEC-Foundation/open-pdf-studio

A free, open-source PDF viewer, editor and annotator for Windows, macOS, Linux and Android, built with Tauri 2 and SolidJS.

Open-source alternative to:Adobe AcrobatBluebeam Revu

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What is it?

Open PDF Studio is a native desktop PDF editor aimed at people who work with drawings and markups. It covers annotation and markup tools such as highlights, shapes, stamps, signatures and redaction, along with measurement tools for distance, area and perimeter with scale calibration.

It also handles CAD work: DWG and DXF files can be imported as vector PDFs with layers and measuring scales, and pages can be exported back to DXF or DWG. Other features include OCR for scanned pages, digital signature validation, side-by-side PDF comparison, form filling, page management, and printing with scale control.

The app is built on Tauri 2 with a Rust backend, SolidJS for the interface, and a multi-process PDFium worker pool for rendering. It exposes a local MCP connection so a local AI assistant can operate the app. The project is licensed under LGPL-3.0.

Key features

  • 01Annotation tools including highlights, shapes, hatch fills, stamps and sticky notes
  • 02Distance, area and perimeter measurement with scale calibration
  • 03Import DWG and DXF as vector PDFs with layers; export pages back to DXF or DWG
  • 04Digital signature validation and PDF revision comparison
  • 05OCR for making scanned pages searchable
  • 06Page management, watermarks, forms and printing with scale options

Use cases

  • Marking up architectural or engineering drawings and taking off quantities
  • Comparing two revisions of a contract or drawing set
  • Making scanned documents searchable with OCR
  • Editing and signing PDFs without a paid subscription

Quick start

  1. 1

    Download the latest release from the releases page

Things to know

  • The license is listed as NOASSERTION in the metadata, though the README states LGPL-3.0, so verify the license before relying on it.
  • OCR is desktop only; the Android build ships without OCR.
  • Some features, such as DWG/DXF import and export and the MCP AI connection, add complexity beyond a basic PDF viewer.

Topics

#pdf#pdf-editor#pdf-annotation#cad#desktop-app#tauri#rust#bim#aec#construction

FAQ

What is open-pdf-studio?
A free, open-source PDF viewer, editor and annotator for Windows, macOS, Linux and Android, built with Tauri 2 and SolidJS. Open PDF Studio is a native desktop PDF editor aimed at people who work with drawings and markups. It covers annotation and markup tools such as highlights, shapes, stamps, signatures and redaction, along with measurement tools for distance, area and perimeter with scale calibration.
Is open-pdf-studio free to use? What license does it have?
open-pdf-studio is open source under the Other license. Check the license terms before using it in commercial products.
Is open-pdf-studio still maintained?
Actively maintained. The last commit to open-pdf-studio was on Oct 19, 2026.
What can I use open-pdf-studio for?
Marking up architectural or engineering drawings and taking off quantities Comparing two revisions of a contract or drawing set Making scanned documents searchable with OCR Editing and signing PDFs without a paid subscription
How do I install open-pdf-studio?
Download the latest release from the releases page
Where can I get open-pdf-studio?
The source code and installation instructions are on GitHub: https://github.com/OpenAEC-Foundation/open-pdf-studio

Summary generated by AI from the project's README. GitHub stats refresh daily.

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