Every tool listed below runs entirely inside your browser — no data ever leaves your machine. Click any card to launch instantly, or download the ZIP bundle to run offline forever.
All tools run 100% in your browser. Data never touches any server.
India's most comprehensive browser-based GST compliance workspace. Reconcile purchase registers against GSTR-2B with the Anand Reco Engine, auto-classify sales data for GSTR-1 table preparation, and manage E-Way Bills — all processed client-side with SheetJS. No internet, no uploads, no risk.
Compare Old vs New Tax Regime instantly. Handles salary, house property, capital gains, NPS, 80C/80D deductions with real-time advisory. FY 2025-26 IT Act 2025 ready. Exports dynamic Excel calculators.
Extract tables from bank statements or ledger PDFs and export to XLSX — entirely locally. Features 6 anomaly intelligence checks: balance verification, Z-score outliers, date gaps, totals validation, and more.
Standard merge, Portal-Ready compliance engine, password decrypter, index/manifest generator, and scanning advisor. Handles GST (5/10MB) & Income Tax portal file limits automatically.
A dedicated portal for CA candidates. Contains the Articleship CV Builder, study planning trackers, and career resources. All tools run client-side with no login required.
Create a professional Chartered Accountancy articleship CV with photo crop, live preview, and instant PDF export — entirely in-browser. Templates tailored for ICAI CA students.
The next wave of CA OS tools — already in active development.
India's open legal & tax research platform — search judgments, case laws, acts, rules, and CBDT/CBIC circulars for free. Simple social login, AI-powered discovery.
AI-assisted audit automation for workpapers, checklist management, sampling calculations, and risk scoring — designed to run on your firm's own hardware.
A complete Income Tax filing and planning dashboard — ITR auto-selection, computation, advance tax planner, and form 26AS reconciliation tool.
Download the ZIP packages, double-click index.html, and run fully offline — no server, no internet, no dependencies.
Beyond free tools — fully custom digital workspaces designed around your firm's unique way of working.
Digitise your firm's entire workflow. Custom dashboards, client portals, internal task systems, approval flows, and billing — set up by us, owned by you.
Deploy secure Large Language Models inside your firm's own hardware or private cloud. Summarise notices, draft tax replies, and search precedents — with zero data leaving your office.
Every free tool in the CA OS suite runs 100% client-side in your browser. No file is ever transmitted to a server. No analytics on your client data. You can inspect the source code yourself — it's all open.
View Source on GitHub