Civil engineering and construction software, free in your browser

CivilOS is one platform covering the work a civil engineering office actually does: drafting, modelling, measurement, cost and site control. Every tool below runs in a browser tab — nothing to install, no licence — and they share one project, so a wall you draw becomes a quantity, a rate and a bill without being re-entered.

It is built around Indian practice — IS codes, the CPWD DSR, State PWD schedules of rates and the NBC — while remaining suitable for international standards and projects.

The whole platform

Civil engineering softwareEvery module of the platform on one page: drafting, BIM, plans, quantities, IS-code BOQ, planning, site and GIS. AEC softwareArchitecture, engineering and construction on one project — design, model, estimate, plan and inspect with a team workspace. Construction management softwareCPM programme and task desk, 250 QA/QC checklists, offline site audits and the running account bill. AI civil engineerConstruction questions answered with the IS code, edition and clause cited — and a plain word when no Indian standard applies.

Drafting

CAD software2D drafting with a real command line, snaps, dimensions, layers, blocks and DXF export — in a browser tab. MEP drafting softwareElectrical, plumbing, HVAC and fire symbols on discipline layers, drafted over your plan. DWG viewer onlineOpen a DWG or DXF as AutoCAD shows it, measure it, calibrate a PDF, and take the quantities off it. AutoCAD alternativeWhat IndoCAD has and what it does not — the whole list, so you can decide in a minute.

Modelling

BIM softwareRevit-style authoring: levels, walls, hosted doors and windows, schedules and IFC4 exchange. 3D building design softwareModel the building and its site in 3D, X-ray the structure, walk in at eye level, export GLB. Revit alternativeWhat Indo-Revit has and what it does not: hosted openings, schedules, sheets and IFC4; no .rvt or families.

Design

Architecture softwareConcept floor plans for any building type, room-by-room areas, sheets and DXF. Interior design softwareWalk the building at eye level, place furniture, choose finishes, edit openings and cost the interior. Space planning softwareOne sentence about the plot and the rooms becomes a dimensioned, audited layout on NBC guidance. Lighting design softwareLux by point calculation and radiosity, uniformity and glare, IES/LDT files and a printable lux report.

Structures

Structural detailing softwareColumn, beam and footing schedules, reinforcement quantities and IS-code bar bending. Bar bending schedule softwareIS 2502 / SP 34 cutting lengths and laps, every row carrying its own formula, into Excel. PEB design softwarePre-engineered shed concept: portal frame section, column grid, elevation, indicative tonnage and DXF.

Cost

Estimation softwareQuantities from drawings into an IS-code BOQ, priced from a real schedule of rates. Cost estimation softwareCPWD DSR 2023, State PWD SOR and market rates, with transparent rate analysis. BOQ softwareBill of quantities with hierarchy, revisions, sanctioned estimate and RA bill formats. Quantity surveying softwareTake-off from a drawing, a linked measurement book and a checkable abstract. Measurement book softwareA linked MB workbook from the drawing set, IS 1200 modes, pre-inspection checks, abstract and RA bill. Quantity takeoff softwareAI reads a PDF into measurement rows; a DWG or DXF is measured exactly with no AI; one click to the BOQ. Rate analysis softwareLabour, material and plant build-ups with overhead and profit, on CPWD DSR 2023 or your State schedule. RA bill softwareThe 13-column running account bill, the deviation statement and 10CC price variation, in Excel.

Planning

Construction planning softwareCPM with WBS, FS/SS/FF/SF links and lag, baseline and a critical path you can read.

Site

GIS softwareDraw a plot on a live satellite map — area, FAR, GeoJSON, KML and DXF out. DPR & MIS softwareDaily progress report, physical & financial MIS, fund forecast — one site or fifty. Tender estimation softwareRate analysis, vendor quotation comparison, overheads & profit, the priced BOQ — and bid evaluation. Site audit & QA/QC appIS-code checklists, photos, GPS, NCRs and signed reports — offline first.

Who uses which tool

If you are a…	Start with
Civil engineer costing a job	Estimation, BOQ, Cost estimation
Draughtsman producing a plan	CAD, Architecture
Architect at concept stage	Architecture, 3D building design
BIM coordinator exchanging IFC	BIM
Quantity surveyor	Quantity surveying, BBS
Planning engineer	Construction planning
Site or quality engineer	Site audit & QA/QC, GIS
MEP draughtsman	MEP drafting
Contractor or PMC running sites	Construction management, DPR & MIS, Site audit & QA/QC, Measurement book, Tender estimation
Interior designer	Interior design, Space planning
Anyone sent a DWG	DWG viewer online, AutoCAD alternative
RCC detailer	Structural detailing, BBS

What CivilOS is not

Being clear about this saves everybody time. CivilOS does no structural analysis or design — there is no frame solver and no member check. It performs no MEP sizing or load calculation. It has no clash detection, no 4D or 5D simulation and no point clouds. Its CAD writes DXF, not DWG, and runs no LISP or scripts. Where a tool is limited, each page below says so in its own words.

Open CivilOS — free, no installation →