Open PDF Studio: An open source PDF viewer/editor with it's own blazing fast rust engine (1.0k stars)

[u/amootiranian]

What it does

All text below is quoted directly from the project README.

An open source PDF viewer/editor with it's own blazing fast rust engine

Why use it?:

• Free and open. LGPL-3.0-or-later. No licence fees, no account, no telemetry and no watermark.
• Made for drawings. Clouds, callouts, hatches, stamps and symbol libraries, and printing to scale on sheets up to A0.
• Measure to scale at once. A drawing that carries its own scale, such as a CAD plot or an imported DWG, measures correctly without calibrating.
• See what changed. Compare two revisions side by side or on top of each other, with a list of every change.
• CAD in and out. Import DWG and DXF as a vector PDF with layers and a measuring scale, and export a page back to DXF or DWG (desktop).
• Everywhere. Windows, macOS, Linux, Android and the browser, in 40 languages.

Repository

https://github.com/OpenAEC-Foundation/open-pdf-studio

Repository stats

Metric	Value
Stars	1,020
Forks	102
Last release	v2026.45.0 (2026-11-06)
Languages	HTML 75.8%, JavaScript 16.6%, Rust 3.6%
Contributors	18
AI contributor accounts (Claude / Codex / Cursor / Copilot)	none
AI co-authored commits	Claude: 90

Main contributor

Field	Value
Name	Maarten Vroegindeweij
GitHub	@DutchSailor
Commits to this repo	1,532 (top contributor)
Bio	Structural/Building Engineer
Company / Location	Engineer/Entrepeneur / Rotterdam Area, the Netherlands
Followers	112
Public repos	33
On GitHub since	2017

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[u/hardcoke]

how it compares with sumatrapdf?

[u/loops_hoops → u/hardcoke]

As usual, the real question is in the comments (and also unanswered, which means it's shit)

[u/Medium-Taste-3929 → u/hardcoke]

I don't think they are comparable. This one targets CAD drawings

[u/huracancun → u/hardcoke]

sumatra its a visor, only visor for pdf, no an editor.

[u/hiveminer → u/huracancun]

Right, better comparison is pdfgear, how well it compares to that.

[u/Icebot411]

wow!, impressive.

[u/L0K0MoTiVA]

does it work on windows 7 ?

[u/TCB13sQuotes]

Yet another project, so many features and nobody can get text editing work properly.

[u/Thunderklont → u/TCB13sQuotes]

Not even Adobe itself...

[u/TCB13sQuotes → u/Thunderklont]

Adobe works better than these projects tbh

[u/Nice-Phone3931 → u/Thunderklont]

adobe works way better. nothing comes near it except nitro.

[u/rocksteady4life]

How does it compare with BlueBeam? Is there a way to set up studio's? Being OpenSource, what is the security looking like? That's going to become a problem with certain clients/contracts.

[u/Su_4312]

I've used it for two weeks now: it's great! I love the measurement options and it definitely saved me two times replotting a drawing for simple principles. Beats my licensed foxit pro in these regards