Ventus
References in a balloon
Rest the pointer on a citation, a figure or an equation and its entry appears beside the text, with a button for its DOI or arXiv page. No jumping to the end and back.
The fast PDF editor that does it all
Its own engine draws pages faster than the one inside Chrome, so big maps and long manuals open in under half a second. Edit text, sign, fill in forms, scan, compare and convert, in a native app for Windows, macOS and Linux.
Heavy PDFs, sharp in 0.23 s · 16 languages · works offline
Heavy files open like light ones
Big maps, plans and scanned books are where most PDF apps make you wait. Ventus draws only what fits on the screen, on every core at once, and sharpens it as you zoom. It also opens 3D PDFs: turn the model, switch its saved views and hide parts.
0.23 s
to open a heavy PDF sharp
0.05 s
to open an ordinary PDF
3D
U3D and PRC models inside the PDF, ready to rotate
From the open command until the whole view is sharp, measured with Ventus’s internal trace on a Windows 11 desktop. Median of 5 runs, November 2026.
Its own engine draws your pages
Most PDF apps use someone else's engine to draw pages. Ventus has its own, written from scratch in Rust. On one CPU core it draws pages faster than PDFium, the engine inside Chrome, at the same quality.
2×
faster on construction drawings
240
of 291 test pages drawn by Ventus's own engine, with PDFium as a fallback for the rest
Time to draw a page, one CPU core (lower is faster)
VentusPDFium
Geometric mean per type over 240 pages of public documents, each drawn at 800 px on one CPU core (best of 5). PDFium = 1. Windows 11, November 2026.
From a scanned page to text you can edit
Open a scan and Ventus recognises its text: every paragraph becomes a block you edit in its own font and in its own place.
Edit the text inside the PDF
Click a line and type. Ventus keeps the paragraph's font, size and colour, so a corrected price or a fixed typo looks like it was always there.
Sign and fill in forms
Type or draw your signature, or sign with a certificate or a USB token. A trusted timestamp keeps a signature valid for years.
Scans you can search
Ventus straightens scanned pages, cleans up the paper and recognises the text. Search a scan, copy from it, or scan straight from your scanner.
Convert in both directions
Save a PDF as Word, Excel, PowerPoint or images, and turn documents, web pages, photos and scans into PDF.
Made for reading, not just for editing
Three tools of its own for long documents, papers and manuals.
A notebook beside the PDF
A ruled page that never ends, next to the document. Write and sketch with the pen while you read; the PDF stays untouched and the notes come back when you reopen it.
Fit to the text
Double-click a column with the middle button, or press Ctrl+3, and Ventus zooms so that column fills the window. Two-column papers become easy to read.
The rest of the toolbox
Combine and split
Join files, take pages out and put them in order by dragging.
Compare two versions
Every change between two documents, scans included.
Redact for good
Remove text and images from the file, not just cover them.
Passwords and permissions
Protect a PDF with AES-256 and choose what others may do.
Comments and markup
Highlights, notes, stamps and drawings that other readers see.
PDF/A for archives
Check a file and convert it for long-term storage.
Accessibility checker
Find and fix what trips up a screen reader.
Read aloud
Listen to any document with the voices of your system.
Built properly, from scratch
Ventus is not a web page in a window. Every part was written for it.
Native, not wrapped
Rust compiled for Windows, macOS and Linux. No Electron, no web view.
Your files stay yours
Everything runs on your computer. No account, no uploads, no tracking.
Its own engine
Pages are drawn by an engine written for Ventus, faster than the one inside Chrome.
In your language
16 languages, right-to-left included, picked automatically.
Pay once, keep it
No subscription and no renewals. Launch-day downloads are free for good.
Familiar from day one
Menus, shortcuts and tools where you expect them, like the editors you already know.
Ventus next to the usual names
Approximate single-user prices of widely used paid PDF editors, taken from their websites, November 2026.
| Ventus next to the usual names | Ventus | Subscription editor | Yearly-plan editor | Licensed editor |
|---|---|---|---|---|
| How you pay | Once | Subscription | Subscription or licence | Licence |
| Price | 10 € | from about 20 € a month | from about 130 € a year | from about 68 € |
| Windows | Yes | Yes | Yes | Yes |
| macOS | Yes | Yes | Yes | No |
| Linux | Yes | No | No | No |
| Edit text, sign, OCR, convert | Yes | Yes | Yes | Yes |
None of those programs is related to Ventus.
A native app, in your language
Ventus is written in Rust and draws its own interface, so large PDFs open fast and everything works offline. It speaks 16 languages, right-to-left ones included.
- Windows 10 and 11
- macOS 11 or later, Apple Silicon and Intel
- Linux: .deb, AppImage and Flatpak
Pay once and keep it
No subscription and no account. Download Ventus on launch day and it's yours for free.
Launch day
Free
Everyone who downloads Ventus in the first 24 hours keeps it for good, with every feature.
After that
10 €
Paid once. Every feature, no subscription.
Launch date coming soon
Download Ventus
One installer per system. The same Ventus on all three.
Questions
Is it really a single payment?
Yes. You pay 10 € once and Ventus is yours. There is no subscription and no account to create.
What do I get if I download it on launch day?
Ventus with every feature, free and for good. It counts for everyone who downloads it in the first 24 hours after launch.
Do my documents leave my computer?
No. Ventus opens and edits your files on your computer. It only goes online when you ask it to, for example to timestamp a signature, open a web page as a PDF or use an AI assistant with your own key.
Which languages does it speak?
Arabic, Basque, Catalan, Chinese, Dutch, English, French, Galician, German, Italian, Japanese, Korean, Polish, Portuguese, Russian and Spanish.
Which systems does it run on?
Windows 10 and 11, macOS 11 or later on Apple Silicon and Intel, and 64-bit Linux as a .deb, an AppImage or a Flatpak.
Open your heaviest PDF with Ventus
No account and no subscription. Windows, macOS and Linux.
Download Ventus