ZS CAD is a free drawing tool for engineers and traders. Drop in ready symbols, snap clean lines on a real millimetre grid, and turn the drawing straight into a BOQ and quotation.
Everything you need to produce a clean technical drawing and hand it to a customer or contractor.
Line, polyline, rectangle, circle, arc and text on a millimetre grid with grid snap, ortho and endpoint/midpoint object snap. Type an exact length and press Enter.
Switch on a 30° iso grid, cycle isoplanes (Top / Right / Left) and draw iso-circles — the same isometric workflow you know from desktop CAD.
Ready symbols for water treatment, electrical and mechanical, plus general drafting marks. Every symbol auto-tags itself (P-1, MGF-2, RO-1).
Draw anything once, save it as a block, and reuse it forever. Your library stays in your browser, ready on your next drawing.
Organise pipe, equipment, text and dimensions on separate layers with solid, dashed, center and hidden line types. Toggle any layer on or off.
Count symbols into a Bill of Quantities automatically, add your rates once, and generate a GST quotation as PDF or a WhatsApp message.
Choose an industry and the palette shows only what you need. Bring your own company name — every drawing carries your title block.
Tank · Pump · MGF · ACF · RO · UV · Softener · Dosing
MCB · Motor · Transformer · Relay · Switch · Fuse · Earth
Flange · Elbow · Tee · Reducer · Valve · Bearing · Gear
Arrows · Boxes · North arrow · Note flags · Detail marks
Pick your industry and drop equipment onto the sheet. Each part is tagged automatically.
Join parts with snapped lines on the PIPE layer and add dimensions where sizes matter.
ZS CAD counts every symbol and totals pipe length into a ready Bill of Quantities.
Add rates, apply GST, and export a PDF or share the quote on WhatsApp in seconds.
Yes. ZS CAD runs free in your web browser. There is nothing to install and no login needed to start drawing.
No. ZS CAD is a standalone drawing tool — you draw entirely inside it. It also exports DXF, so your drawing opens in desktop CAD programs when you need it.
Yes. Turn on isometric mode for a 30° grid, switch isoplanes between Top, Right and Left, and draw iso-circles — the same isometric drafting workflow you know from desktop CAD.
Water treatment, electrical and mechanical/piping come built in, along with general drafting symbols. You can also save your own custom blocks for anything else.
Yes. ZS CAD counts the symbols in your drawing to build a Bill of Quantities, then lets you add rates to generate a GST quotation you can export as PDF or send on WhatsApp.
Yes. It is touch-friendly — draw with one finger, pinch to zoom — so it works on phones and tablets as well as desktops.
No sign-up, no install. Start your first P&ID or isometric drawing right now.
Start drawing — free