Every architect and engineer knows this: you open a 220 MB construction drawing in Adobe Acrobat or Apple Preview — and you wait. And wait. Switching pages takes seconds, zooming takes longer. And if the file has 50+ layers? The app simply freezes.
At Noir architects — an architecture studio in Vilnius — we deal with this every single day. We design buildings where each PDF has dozens of drawings: plans, elevations, sections, structural, MEP. All of it exported from ArchiCAD, Revit, or AutoCAD into PDF — and then the suffering begins.
Who We Are
Noir architects is a working architecture studio based in Vilnius, Lithuania. We design residential, commercial, and mixed-use buildings — the kind of projects where a single set of construction drawings can run hundreds of pages and span dozens of disciplines.
We are not a software company. We are not a startup. We are a small team of practising architects who, after years of fighting the same daily friction, decided to build a tool we couldn't find on the market.
Everything you'll read below is grounded in real project work — drawings we open every morning, files we exchange with structural engineers and contractors, the moments where the wait time on a single PDF eats half a coffee break.
The Problem: PDF Wasn't Built for Drawings
The PDF format was created in 1993 — primarily as a way to print and share documents reliably across different operating systems. It works wonderfully for a 10-page contract, a sales presentation, or an annual report.
But when an architecture firm exports a project from ArchiCAD, Revit, or AutoCAD, the resulting PDF is something completely different:
- Large files — a full set of construction drawings can weigh 50–220 MB, sometimes more on complex projects
- Hundreds of pages — a full project set with elevations, sections, details, and specifications
- Dozens of layers — electrical, plumbing, structural, finishes — each a world of its own
- Vector graphics — thousands — sometimes tens of thousands — of lines, curves, dimensions, and text elements packed into a single page
The format was never designed to render this kind of complexity in real time. And most PDF viewers were never built with this use case in mind.
The Current Landscape
Before we built Ncored, we used the same tools every architect uses. Each one is excellent at what it was designed for, and each has earned its place on millions of professional desktops. But none of them were built specifically for opening very heavy construction drawings quickly.
Adobe Acrobat® is the industry standard for PDF — and for good reason. It handles complex graphic design work, advanced form creation, digital signatures, and document collaboration with a depth no other tool matches. Almost every business workflow on the planet touches it at some point. Its strengths are reliability, ubiquity, and a feature set built over three decades of development. Where it was never optimised is real-time rendering of high-density vector construction drawings.
Bluebeam Revu® is a deeply respected name in the AEC industry. It's the collaboration standard for many large architecture and construction firms — especially for markup, RFIs, punch lists, and Studio Sessions. Many of our friends in larger firms swear by it. Its focus is collaboration and review, not raw rendering speed on heavy single files.
Foxit PDF Editor is a strong general-purpose PDF tool with a more lightweight footprint than Acrobat. It's a popular choice for teams that want Acrobat-style editing without the overhead.
Apple Preview ships free on every Mac and is a wonderful viewer for everyday files. For a contract, an invoice, or a one-page exhibit, it's hard to beat. For a 220 MB drawing set with hundreds of vector layers, it simply wasn't engineered for that load.
| Tool | Designed for | Where it shines | Where it slows down |
|---|---|---|---|
| N Ncored | Heavy construction drawings, fast opening | Instant scrolling, fast first paint, native macOS + Windows | Not a digital signature or full forms platform |
| Adobe Acrobat® | Documents, signatures, graphic design, forms | Universal standard, 30+ years of development, unmatched feature depth | Heavy vector drawings, very large files |
| Bluebeam Revu® | AEC collaboration, markup, RFIs | Studio Sessions, punch lists, team review | Raw opening speed on single heavy files |
| Foxit PDF Editor | General-purpose PDF editing | Lighter than Acrobat with similar features | Same architectural limits on heavy drawings |
| Apple Preview | Everyday document viewing | Free, fast on simple files, ships on every Mac | Was never engineered for vector PDFs of this density |
Each of these tools is genuinely good at what it does. The question we kept asking ourselves was different.
What if a PDF viewer were built specifically for the moment an architect double-clicks a heavy drawing?
Why an Architecture Studio Built a PDF Tool
At our office, we tried everything. We tested combinations. We adjusted settings. We bought more RAM. We upgraded laptops. The fundamental experience — open a heavy drawing, wait, scroll, wait again — never went away.
Eventually we did the math. Up to ten minutes per architect, every working day, lost to a viewer simply being slow. Across a year, that adds up to entire work weeks. Across a small team, it adds up to months.
Architects should be designing. Engineers should be solving. Construction managers should be coordinating. Nobody should be sitting still, watching a progress bar, waiting for vector layers to finish loading.
That's how Ncored was born — not as a startup pitch, not as a product strategy, but as a tool we needed for ourselves. We hired a small engineering team, focused them on one specific problem, and started building.
What Ncored Does Differently
We're not trying to be a universal PDF tool. We're trying to be the best possible viewer for one specific moment: opening a very large construction drawing on a working machine.
We focused our engineering on three outcomes — not features, not settings, just three things that had to feel right.
We also made deliberate choices about what not to build — at least for now. Ncored is not a digital signature platform. It is not a forms engine. It does not ship a thousand markup tools you'll never use. We focus on the things AEC professionals open a PDF viewer for ten times a day, and we try to make those things feel instant.
The trade-off is honest: if you need every feature in Adobe Acrobat, Ncored isn't for you. If you spend half your day waiting for drawings to open, it might be.
How to Evaluate a PDF Viewer for AEC Work
If you work with large drawings every day, here's a simple test you can run on any PDF viewer — including ours.
Five small tests, less than five minutes. If your current tool fails on more than one of them, the cost in lost time is real — and likely larger than you realise.
A Note on Comparisons
When we talk publicly about how Ncored compares to other PDF tools, we try to follow two rules.
First, we acknowledge what other tools do well. Adobe Acrobat® is excellent for documents, graphic design workflows, and digital signatures. Bluebeam Revu® is well established in AEC for collaboration. Foxit and Apple Preview each have clear use cases. The honest answer to “which PDF tool should I use?” is “it depends on what you're doing.”
Second, when we report numbers, we report the methodology behind them. Our internal benchmarks compare opening times on a 220 MB construction drawing PDF, measured on an M4 Pro MacBook Pro in at launch. On that test, Ncored reached first paint in roughly 0.8 seconds. Results on your hardware and your specific files will vary, sometimes substantially.
Try It Yourself
The best way to find out whether Ncored fits your workflow is to open one of your own drawings in it. The trial is fourteen days, every feature included, and you sign in with your email — no credit card needed to start.
If it doesn't open your largest file faster than what you're using today, we'd love to know. Honest feedback is how this product gets better.
