10 Best Free tool Websites for Architecture Site Analysis in 2026

Every architecture student has been there. Your site analysis submission is in two days. You need solar data, wind direction, contour lines, and a base map and you have no idea which tools to use or where to start.

The problem isn't skill. It's that nobody tells you about the right websites.

This guide covers 10 free tools that working architects and architecture students across India and globally are using right now for climate analysis, solar studies, GIS mapping, shadow simulations, terrain data, and urban context without paying for a single licence.

We've updated this list for 2026, adding newer tools that many students are still unaware of, and kept the trusted classics that haven't lost their edge.

Quick comparison - what each tool does:

1. Climate Consultant — Turn Raw Climate Data Into Design Decisions

URL: energy-design-tools.sbse.org

Best for: Passive design strategy, climate zone analysis, architecture thesis

Cost: Free desktop download

If you're designing in Mumbai, Chennai, Ahmedabad, or Delhi cities with completely different climate profiles, Climate Consultant is the one tool that tells you exactly how to respond to each. It was developed by UCLA and it translates standard EPW weather files into visual, actionable passive design strategies.

Upload your site's climate file and the tool generates a psychrometric chart showing which strategies — cross-ventilation, thermal mass, shading, evaporative cooling  will deliver comfort and for how many hours. That's the kind of data that separates a strong site analysis from a generic one.

What you get:

• Psychrometric charts with comfort zone overlays
• Monthly wind rose diagrams
• Recommended passive design strategies ranked by effectiveness
• Seasonal temperature and humidity breakdowns

Practical use: Architecture students preparing passive design sections for their thesis or jury presentations use this to show they've made climate-responsive decisions not just aesthetic ones.

💡Tip: Focus on the psychrometric chart first. It shows how many hours per year each passive strategy will work for your specific location. If you're in a composite climate like Delhi, you'll see that you need strategies for both hot-dry summers and cool winters not just one.

If you want to go deeper into how climate data connects with actual design decisions, Kaarwan's climate analysis for passive design strategies guide explains the process step by step.

2. Sun Path Tool by Andrew Marsh — The Simplest Solar Diagram on the Internet

URL: andrewmarsh.com/software/app-sunpath

Best for: Solar orientation, facade design, overhang calculation

Cost: Free, browser-based, no login needed

This is probably the most-used free solar tool in architecture education globally. You enter your site's latitude, pick a date, and instantly get a 2D or 3D sun path diagram showing solar angles, azimuth positions, and altitude at every hour of the day.

No installation. No account. Works on mobile.

What makes it genuinely useful not just academically interesting is how directly it connects to design decisions. A 10 AM December sun angle tells you exactly how deep your overhang needs to be to shade a south-facing window. A 3D chart overlay lets you check whether the building next door will block your winter sun.

What you get:

• 2D equirectangular and 3D stereographic sun path charts
• Customisable date and time
• Solar azimuth, altitude, and hour angle data
• Shadow angle information for overhang design

💡Tip: Compare the June 21 and December 21 sun paths side by side before you finalise your building orientation. The difference in solar altitude can be 40-50 degrees that's the difference between a building that stays cool in summer and one that overheats by 11am.

3. Shadowmap — See Exactly What Gets Sun and What Doesn't

URL: shadowmap.org

Best for: Overshadowing analysis, planning submissions, solar validation

Cost: Free, browser-based

This is the tool most students don't know about and the one that impresses juries the most.

Shadowmap shows you real-time 3D shadows cast by your building and everything around it, for any location on Earth, at any date and time. Set it to your site's coordinates, pick December 21st at 10am, and immediately see how much of your site is in shadow and from what.

That's information you simply cannot get from a sun path diagram. Sun paths show angles. Shadowmap shows actual impact.

Where it's especially useful:

• Urban infill sites where surrounding buildings affect daylight
• Sites with specific right-to-light or overshadowing regulations
• Thesis projects where you need to prove your building won't cast excessive shadows on neighbours
• Any design where the outdoor space quality depends on sun access

💡Tip: Planning authorities in many cities — including those following NBC (National Building Code) guidelines — test overshadowing at 9am, 12pm, and 3pm on the winter solstice. Run Shadowmap at those three times on December 21 and you'll have exactly the evidence you need.

4. Ventusky — Watch Wind Move Across Your Site

URL: ventusky.com

Best for: Wind analysis, ventilation strategy, outdoor comfort

Cost: Free, browser-based

Wind data is one of the most neglected parts of student site analysis mainly because it's hard to visualise from static charts. Ventusky solves that completely.

It's an animated weather and climate platform that shows you wind direction, wind speed, temperature, humidity, and rainfall as live overlays on a world map. More importantly, you can scroll through months of historical data to understand how wind behaves across seasons — not just today.

For architecture site analysis, this means you can identify prevailing wind direction, understand seasonal wind shifts, and make informed decisions about where to place openings, screens, and outdoor spaces.

Useful for:

• Natural ventilation and cross-ventilation strategy
• Locating courtyard openings to capture prevailing breeze
• Rooftop terrace and outdoor space planning
• Sites in coastal or valley locations with complex wind behaviour

💡Tip: Switch between the surface layer and the 850 hPa layer in Ventusky. Surface wind shows street-level conditions. The 850 hPa layer (about 1,500m up) shows the regional wind pattern that drives the local microclimate — useful for understanding why a site feels windier than others nearby.

For Indian architecture students understanding how monsoon wind patterns interact with your site orientation is a huge part of passive design in humid climates. Kaarwan's climate analysis 101 guide for architecture students covers this in detail.

5. OpenTopography — Free Terrain Data for Any Site in the World

URL: opentopography.org

Best for: Sloped sites, terrain models, contour generation

Cost: Free with a free account

Getting accurate topographic data used to mean either waiting for a commission survey or manually tracing satellite images. OpenTopography changes that.

It gives you free access to Digital Elevation Models (DEMs) from sources including SRTM, LIDAR, and Copernicus covering most of the planet. Download elevation data for your site and import it directly into SketchUp, Rhino, QGIS, or AutoCAD to generate contour maps and 3D terrain models at schematic stage.

For sites in hilly areas Shimla, Pune, Hyderabad's older neighbourhoods, most of the Northeast this is invaluable. You can model site gradient, understand drainage flow, and make cut-and-fill decisions before a single survey rupee is spent.

What you can download:

• Digital Elevation Models (DEMs) in GeoTIFF or ASCII format
• LIDAR point cloud data for select areas
• Pre-processed contour data for direct CAD import

💡Tip: For academic projects and early feasibility work, the SRTM 30m resolution dataset is usually enough. It's free, globally available, and accurate enough for schematic-level terrain models. If you need finer detail, check if your city's municipal corporation publishes open LIDAR data.

6. QGIS — The Most Powerful Free GIS Tool You're Probably Not Using

URL: qgis.org

Best for: Urban planning, spatial analysis, layered site maps

Cost: Free desktop software

Most architecture students know AutoCAD. Fewer know QGIS — which is a significant missed opportunity, because QGIS does things AutoCAD cannot.

It's a full Geographic Information System platform that lets you import, layer, and analyse spatial data from dozens of sources. Zoning maps, land use classifications, flood zones, vegetation cover, road networks, building footprints, soil types — all in one editable, printable environment.

For complex urban sites or sites with environmental constraints, QGIS is how you understand what you're actually dealing with before you start designing.

What architecture students use it for:

• Mapping flood risk zones and building setback restrictions
• Understanding land use patterns around a site
• Creating layered, publication-quality site analysis maps
• Importing OpenTopography terrain data and overlaying with street context

💡Tip: For Indian sites, combine QGIS with Bhuvan (bhuvan.nrsc.gov.in) — ISRO's free GIS platform. Bhuvan has India-specific data including thematic maps, land use, urban growth, and satellite imagery at better resolution than global datasets for many Indian cities.

If you want to understand how to translate all this GIS data into a structured site analysis process, the step-by-step guide to architectural site analysis data collection on Kaarwan walks through exactly how to organise what you collect.

7. OpenStreetMap — Your Site's Base Map, Ready in 5 Minutes

URL: openstreetmap.org

Best for: Base maps, urban context diagrams, competition boards

Cost: Free

OpenStreetMap is the open-source alternative to Google Maps — and unlike Google Maps, you can actually download the data and edit it.

For architecture, that means you can pull a clean vector base map of your site and its surroundings — roads, building footprints, land use areas, vegetation patches, plot boundaries, public spaces — and import it into AutoCAD, Illustrator, or Rhino in .DXF or shapefile format.

No more spending two hours tracing a site plan from a screenshot. No more inaccurate building outlines. For early feasibility studies and competition entries especially, this saves significant time and produces far cleaner base geometry.

Works best when:

• Survey drawings aren't yet available
• You're working on an urban context diagram for a presentation
• You need editable building footprints for a masterplan base
• You're preparing a competition entry with tight deadlines

💡Tip: Use Mapshaper (mapshaper.org) to clean up OSM exports before bringing them into CAD. Raw OSM data often includes redundant overlapping geometry that will slow your file and cause import issues. Mapshaper simplifies it in seconds without losing accuracy.

8. Cadmapper — Download Your Site as a Ready-to-Use CAD File

URL: cadmapper.com

Best for: Quick site modelling, massing studies, CAD imports

Cost: Free up to 1 km²

Cadmapper takes OpenStreetMap and OpenTopography data and packages it into a single downloadable CAD file — with building footprints, road centrelines, terrain contours, and 3D geometry — exported directly as .DWG, .DXF, or .SKP.

For a 1 km² area, it's completely free. You select your site on a map, click export, and within a minute you have a 3D site model ready to open in AutoCAD, Revit, or SketchUp. Kaaewa's Sketch Up gives more hands on skills.

For early massing studies and competition entries where approximate geometry is fine, this saves an enormous amount of modelling time. Instead of tracing building outprints from satellite images, you start with real geometry.

Students use it for:

• Setting up site context models quickly for studio projects
• Generating terrain and road geometry for SketchUp massing
• Competition entries where context modelling time is limited
• Urban design and master planning exercises

💡Tip: After importing into SketchUp, use the Sandbox from Scratch tool to smooth the terrain mesh. Cadmapper terrain comes as a triangulated surface — accurate, but visually rough at close range. Smoothing takes two minutes and makes your renders look significantly more professional.

9. Luminocity3D — Understand the Urban Scale Around Your Site

URL: luminocity3d.org

Best for: Masterplanning, urban infill, height strategy

Cost: Free, browser-based

When you're designing a building in a dense urban area, one of the most important things to understand is the scale and density of what surrounds you. Luminocity3D gives you that in 3D.

It visualises building heights, population density, employment distribution, and urban growth patterns across major cities as interactive 3D maps. You can look at your site in context — not just street level, but as part of the wider urban fabric and understand how your building's height and footprint compares to its surroundings.

Useful for:

• Justifying height and massing decisions in design statements
• Understanding development intensity for mixed-use programmes
• Urban design and master planning proposals
• Thesis projects with urban regeneration or infill briefs

💡Tip: Use Luminocity3D alongside your local development plan's height policies. Having a 3D visualisation of surrounding density makes a much stronger argument for or against a particular height strategy than written description alone especially in jury presentations and planning submissions.

10. Aino World — AI Does Your Initial Site Research

URL: aino.world

Best for: Early feasibility, rapid site comparison, AI-assisted insights

Cost: Freemium

This is the newest category of site analysis tool — AI-powered GIS. Instead of manually compiling data layers from multiple sources, Aino World's AI engine pulls together sun exposure, terrain variation, wind behaviour, accessibility, and demographic data automatically, for any location you input.

For architects who need to quickly evaluate multiple potential sites or for students who need to establish site credentials fast before the detailed analysis begins this dramatically reduces the research stage.

It doesn't replace QGIS or Climate Consultant for rigorous analysis. But as a starting point that tells you what a site's main opportunities and constraints are before you've opened a single other tool, it's genuinely useful.

Best used at:

• The very start of a project when you're still evaluating site options
• Urban-scale feasibility studies with multiple potential locations
• Thesis projects where you need to justify site selection with data

💡Tip: Use Aino World to identify your site's biggest challenge in the first five minutes, whether that's poor solar access, high wind exposure, or poor connectivity. Then use the specialist tools (Shadowmap, Ventusky, QGIS) to go deeper on exactly those issues.

The one thing these tools can't do for you

All 10 tools above give you data. What they don't give you is the ability to read that data, connect it to design decisions, and present it clearly those are skills that take practice.

Knowing that your site gets four hours of winter sun isn't useful on its own. Knowing how to turn that into a massing decision, a section cut, and a convincing jury slide that's the actual skill.

If you want to get good at that part not just the tools. Kaarwan's Site Analysis and Climate Study masterclass teaches you how working architects actually interpret and apply site data to real design problems. Architecture students across India have used it to level up their thesis and studio submissions.

How to use these tools together — a suggested workflow

Most students pick one tool and stop. The best site analyses layer multiple data sources. Here's a practical order:

Week before submission full site analysis workflow:

Start with Aino World for a rapid overview of your site's main characteristics. This tells you where to focus your detailed research.

Move to Climate Consultant and Ventusky for climate data. Download the EPW file for your city, run it through Climate Consultant, and cross-reference the wind data with Ventusky animations.

Use OpenTopography to get your site's terrain data. Import it into QGIS alongside OpenStreetMap data to build your layered base map.

Run Shadowmap at winter solstice for 9am, 12pm, and 3pm to document solar access. Run the Andrew Marsh Sun Path tool to generate your solar diagrams.

Use Cadmapper to set up your 3D context model in SketchUp for massing studies.

Use Luminocity3D to understand urban density if your project is in a city centre.

You don't need all ten every time. A rural site probably doesn't need Luminocity3D. An urban infill project might not need OpenTopography. Use the ones that are relevant to what your specific site's challenges are.

To understand how to structure all this data into a coherent analysis document, the ultimate site analysis checklist gives you a clear framework for what to include and in what order.

Final thoughts

A strong site analysis isn't about using the most tools. It's about asking the right questions about your site and finding the data that answers them.

These 10 free websites give you access to professional grade information that architects and urban designers use on real projects. The fact that they're free means there's no barrier — the only thing between you and a genuinely rigorous site analysis is knowing they exist and how to use them.

You now know they exist. Use them.

Frequently Asked Questions

1.What are the best free websites for architecture site analysis?

The best free websites for architecture site analysis are Climate Consultant (passive design strategy), Sun Path by Andrew Marsh (solar diagrams), Shadowmap (3D shadow studies), Ventusky (wind and climate), OpenTopography (terrain and elevation), QGIS (GIS platform), OpenStreetMap (base maps), Cadmapper (CAD exports), Luminocity3D (urban density), and Aino World (AI-assisted site research). All are free or have a generous free tier.

2. Which site analysis tool is best for architecture students in India?

For Indian architecture students, the most immediately useful combination is Climate Consultant (download the EPW file for your city from climate.onebuilding.org), QGIS with Bhuvan data for India-specific maps, and the Sun Path tool by Andrew Marsh for solar studies. For cities like Mumbai, Chennai, Delhi, and Ahmedabad, Climate Consultant's passive strategy outputs are directly applicable to the local climate zone.

3. How do I do site analysis for architecture without buying software?

You don't need to buy any software. Use Climate Consultant and Ventusky for climate and wind data, Sun Path by Andrew Marsh or Shadowmap for solar studies, OpenTopography for terrain, QGIS and OpenStreetMap for mapping, and Cadmapper to generate a CAD site model. Every tool listed in this guide is free or has a free tier that covers all typical student and early-professional needs.

4. What is the best tool for shadow analysis in architecture?

Shadowmap (shadowmap.org) is the best free tool for shadow analysis. It shows real-time 3D shadows for any location, date, and time — including surrounding buildings. This makes it significantly more useful for real site conditions than sun path diagrams alone, which only show angles without contextual shadow impact.

5. How do I create a site analysis base map for free?

The fastest way is to use Cadmapper — select your site area, download the .DWG file, and open it in AutoCAD or SketchUp. Alternatively, export your area from OpenStreetMap as a .DXF file and clean it up in Mapshaper before importing. Both methods take under 10 minutes and give you editable vector geometry.

6. What GIS software do architects use?

QGIS is the most widely used free GIS software among architects and urban designers. It handles terrain data, zoning maps, land use layers, and building footprints and exports to formats compatible with AutoCAD and Illustrator. ArcGIS is the industry standard in professional practice but is expensive. For most architecture students and early-career professionals, QGIS provides equivalent functionality at no cost.