6 Free Browser Tools Every Architect Should Bookmark in 2026
There's a category of work that sits awkwardly between "too small for the big software" and "too important for guesswork": the quick lot check before a client meeting, the takeoff for a variation, the model a consultant sent that you just need to look at. Firing up (or licensing) heavyweight desktop software for these jobs is overkill; doing them by hand is how errors creep in.
Browsers quietly became capable of professional-grade AEC work — parsing BIM models, rendering drawing sets, running geometry — and a set of free tools now covers this middle ground. The six below share three traits worth caring about: no installation (they run on any machine, including the locked-down laptop at the client's office), no account (open the page, start working), and no upload (files are processed locally in your browser, which means confidential project information never touches a third-party server — a bigger deal than most people realise, and worth reading about in its own right).
They also cover the project lifecycle in a neat sequence, which is how they're ordered here.
1. Site Feasibility Calculator — before you commit to the land
The job: answer "what can legally be built on this lot?" in minutes. Draw the plot boundary, enter the zoning parameters — setbacks, site occupancy percentage, floor-to-lot-area ratio, height limit — and the tool draws the buildable envelope and reports allowable footprint, maximum floor area, and implied storeys. One click exports a PDF feasibility report.
Who reaches for it: architects screening sites, developers comparing candidate lots, and anyone about to buy property who'd rather learn the constraints before the purchase than after.
2. SpaceFlow — turning the brief into a program
The job: convert a client's wish list into a structured space program with areas and adjacency relationships, then see it as a live bubble diagram. Spaces cluster and separate according to the relationships you define, so the building's organisational logic emerges before any floor plan exists — while changes are still free.
Who reaches for it: architects at brief stage, and students learning why programming comes before sketching.
3. AnchorMind — thinking before drawing
The job: visual brainstorming built with design work in mind. Map a client brief, untangle a concept, structure a presentation narrative, or plan a project's moving parts as a radial mind map with dependencies — the kind of thinking that otherwise lives on a whiteboard that gets erased.
Who reaches for it: anyone at the fuzzy front end of a project, where the ideas are still forming and the worst thing you can do is commit to geometry too early.
4. Simple QTO Tool — quantities without the licence
The job: digital takeoff on PDF drawings. Calibrate the scale against a known dimension, then measure linear runs, areas, and counts directly on the sheet — every measurement stays as a visible markup and feeds a live schedule. Add unit rates for a quick estimate, then export the bill of quantities as PDF or CSV.
Who reaches for it: small practices and contractors pricing work, site engineers measuring variations, QS students — anyone who needs a defensible takeoff without a takeoff-software budget.
5. BIM Model Viewer — open any IFC, anywhere
The job: open an IFC model — the vendor-neutral BIM format — with nothing installed. Navigate the 3D model, browse the spatial tree, click elements to read their properties, and cut live sections. Most "can you check the model?" questions get answered here without a Revit or Navisworks licence in sight.
Who reaches for it: project managers, clients, site teams, and reviewers who receive IFC deliverables but don't author models — plus BIM folk who need a viewer on a machine that isn't theirs.
6. Taskboard — running the team without another subscription
The job: Kanban boards and Gantt timelines shaped for design and construction workflows — deliverables moving through drafting, checking, and issue. No login, no per-seat pricing: the board saves to a JSON file you keep, share, and version like any other project file.
Who reaches for it: team leads who want visible workflow without procuring (and paying monthly for) yet another SaaS platform — and without putting the team's programme of work on someone else's analytics dashboard.
Pro tip: The JSON save file is more powerful than it looks. Because the board is a plain file, you can keep it in the project folder under your existing naming conventions, snapshot it at each reporting period, and diff versions to see exactly what moved — a lightweight audit trail that subscription boards charge enterprise tiers for.
The pattern worth noticing
Individually, these are handy bookmarks. Together they make a quiet argument: a meaningful slice of professional AEC work — feasibility, programming, ideation, takeoff, model review, coordination — no longer requires installed software, licences, or handing your files to a server. The browser you already have is enough, and the files never leave your machine.
Bookmark the suite once and you'll be surprised how often it's the fastest path from question to answer:
Explore all six tools → — free, no accounts, no uploads. Just open and work.