Show HN: Aircad – Professional drafting and 3D modeling in the browser

New Aircad is open to everyone Draft, model, and document. Together. Precision 2D drafting and 3D modeling, with multiplayer editing and an AI agent that drafts, models, and renders alongside you. Start for Free See what's inside Read the docs Woven Grove Pavilion - Aircad aircad.com/f/woven-grove-pavilion 9:41 No installs Open a browser and start drawing, always on the latest version. Pro 2D & 3D drafting Precision drafting and solid modeling in one app. Version history Every change is on record. Opens your DWGs With their layouts, blocks, and dimensions. 01 / Drafting & 3D Pro 2D & pro 3D in one app. 2D drafting and 3D solid modeling in one fast, beautiful workspace, from a command line that takes the shortcuts you already know. Browse every command Copperlight Library - Aircad aircad.com/f/copperlight-library Familiar drafting tools Trim, split, extend, stretch, arcs, hatches, blocks, and layers, with command line precision and snaps. NURBS-based solid modeling Booleans, fillets, shells, lofts, and sweeps. Push/pull modeling Pick a face and push or pull it with precision. Block libraries built in Doors, windows, furniture, and plumbing in Imperial and Metric, plus your team’s own blocks, shared in one place. 02 / AI Powerful AI on your terms. Ask a question or describe an edit in plain words, and the agent works right in your drawing. How the agent works UP 12′-10″ HALL BEDROOM 2 STUDY BEDROOM 3 UP 12′-10″ HALL BEDROOM 2 STUDY BEDROOM 3 Does this stair meet code? Checking the stair against the IRC Floor to floor is 9′-4″ (112″) over 14 risers: 8″ each, over the 7¾″ limit. Treads are 11″ (10″ minimum). 112 ÷ 7.75 = 14.45, so 15 risers at 7.47″. With the top landing fixed, the new tread goes at the bottom, so check the bottom landing (36″ minimum) and headroom (6′-8″ minimum). Read the file overview Read the file Open in Scripts No. Its 14 risers are 8″ each (9′-4″ floor to floor), and the IRC allows 7¾″. The 11″ treads pass. 15 risers at 7.47″ would pass. Keeping the top landing where it is, the run grows one tread at the bottom: the bottom landing stays 3′-4″ deep and headroom is 6′-11″. Want me to make that change? Yes, fix it. Draft: Creates 1 line on layer Stairs. Reshapes 3 lines. Edits 1 dimension. Open in Scripts I added the 15th riser, lengthened the guard, handrail, and arrow, and updated the run’s dimension to 12′-10″. Apply this change? Apply Enter Discard Esc Or say what to change Auto Does this stair meet code? Checking the stair against the IRC Floor to floor is 9′-4″ (112″) over 14 risers: 8″ each, over the 7¾″ limit. Treads are 11″ (10″ minimum). 112 ÷ 7.75 = 14.45, so 15 risers at 7.47″. With the top landing fixed, the new tread goes at the bottom, so check the bottom landing (36″ minimum) and headroom (6′-8″ minimum). Read the file overview Read the file Open in Scripts No. Its 14 risers are 8″ each (9′-4″ floor to floor), and the IRC allows 7¾″. The 11″ treads pass. 15 risers at 7.47″ would pass. Keeping the top landing where it is, the run grows one tread at the bottom: the bottom landing stays 3′-4″ deep and headroom is 6′-11″. Want me to make that change? Yes, fix it. Draft: Creates 1 line on layer Stairs. Reshapes 3 lines. Edits 1 dimension. Open in Scripts I added the 15th riser, lengthened the guard, handrail, and arrow, and updated the run’s dimension to 12′-10″. Apply this change? Apply Enter Discard Esc Or say what to change Auto Your choice of model Auto Claude GPT Gemini DeepSeek GLM and more Help with the whole job It drafts, models, and writes commands, and renders your model as an image or right in a viewport. Nothing changes without your OK Every change arrives as a draft, highlighted in the drawing, for you to apply or discard. Right where you work Ask from the command line or the Agents panel, with your choice of model. Threads are saved with the file, private to you. Entirely optional Everything in Aircad works without it. Use it as much or as little as you like. 03 / Collaboration Always up to date. Every change on record. One source of truth for every drawing. No emailed copies, no files checked out, no “final_v3.” Every edit is kept with who made it and when. Sharing and comments in the docs Multiplayer editing Share a link and everyone works in the same file, so there's never a stale copy, and you can see who's working where. Always the latest revision Everyone edits the same file at once, and each change shows up for everyone as it's made. Comments on the drawing Feedback stays pinned to the spot it's about, not lost in email, so the context is kept as the drawing changes. Review is built in Comments, redlines, and marked-up PDFs are part of Aircad. No separate review subscription required. Control who can edit Share with a link, and decide who can edit and who can only view. Mounting Plate MC AR 160 90 Ø24 M MC Maya Chen · 2m Can the bore go to Ø32 for the larger bearing? AR Alex Rivera · now Opening it up now. Maya Chen Alex Rivera 2 A clear record of every change. Every file keeps unlimited version history, so nothing is lost and any change can be traced back. A complete audit trail Every edit is kept with who made it and when, in an activity feed for the file. Compare any two versions See what was added, changed, and deleted, tinted right in the drawing. Fork and edit Experiment on a fork from any point in the history. The original stays as it was. Restore earlier work Bring back an earlier version whenever you need it. Mounting Plate All changes saved Version history Rev A From Alex · Yesterday, 16:42 Bolt pattern You · Today, 10:18 Rev B To Alex · Today, 11:06 Current version You · Today, 11:32 Rev A Rev B 5 added 2 changed 1 removed 160 90 Ø32 4× Ø6 on Ø56 Your current drawing stays intact while you compare. Restore earlier work 04 / Documentation Document everything, beautifully. A drawing set is only as good as its annotation. Dimensions, GD&T, leaders, text, and tables, on layouts with viewports at any scale that print exactly as they look. Annotation in the docs Kitchen Faucet - Aircad aircad.com/f/kitchen-faucet Every dimension type Linear, angular, radius, diameter, arc length, ordinate, baseline, and continue. Each follows the geometry it measures, so it stays right as the design changes. GD&T and leaders Feature control frames on their own or on a leader, and leaders for notes and callouts. Text, tables, and title blocks Styled text, tables for schedules and parts lists, and title blocks with attributes. Styles keep a whole set consistent. Beautiful view styles Sections with hatching, hidden line from the model, line weights, shadows, and physically based materials, with a print preview that matches the PDF. 05 / Import & export Bring your files. Take them anywhere. Open DWG and DXF with their layouts, blocks, and dimensions, and bring in Rhino, STEP, glTF, and SVG. Send drawings back as DWG, DXF, or PDF, and models as STL or OBJ. What each format brings in .dwg AutoCAD drawing Import · Export .dxf Drawing exchange Import · Export .pdf Drawing set Export .3dm Rhino model Import .step Solid exchange Import .gltf Scene + materials Import .svg Vector artwork Import .stl · .obj Meshes Import · Export Performance Serious CAD performance. 250,000+ entities in one file. Keep the whole model in one place instead of splitting it across files to keep your CAD responsive. Bundled Tower - Aircad aircad.com/f/bundled-tower 108 floors. 38,510 editable solids. Big models stay smooth Pan, zoom, and orbit stay fluid with thousands of solids on screen, and repeated parts and blocks barely add to the load. Edits stay quick Changing one part updates just that part, so a big file feels as quick as a small one. Heavy work runs in the background Booleans, edge fillets, lofts, sweeps, a