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Free Business Tools for Indian SMBs

6 powerful tools — completely free, no login required. Built specifically for Indian GST-registered businesses.

All Free Tools

No signup. No login. Just open and use. 100% free, always.

No Login Required Free Forever Works on Mobile

GST Calculator

Calculate GST on any amount. Add GST to a price or remove it. Get CGST + SGST (intrastate) or IGST (interstate) breakdown instantly.

Add GSTRemove GSTCGST/SGST splitIGSTAll GST ratesInstant results

Invoice Calculator

Add multiple items, set GST rates per item, apply discount, and see the complete invoice breakdown — taxable amount, taxes, and final total.

Multi-itemPer-item GSTDiscountSubtotalGST breakupGrand total

GSTIN Validator

Validate any GSTIN number instantly. Checks format validity and decodes embedded information like state code, PAN, entity type, and more.

Format checkState decodePAN extractEntity typeRegistration yearCheck digit

HSN/SAC Code Finder

Search for HSN codes by product name or SAC codes by service name. Find the right code with applicable GST rate for your invoices.

HSN searchSAC searchGST rateCategory filterExport listCommon codes

Quick Bill Generator

Create a professional bill or invoice instantly without login. Enter your details, add items, and print or download as PDF. Perfect for quick billing.

No loginPDF downloadPrint readyGST invoiceCustom logoProfessional look

Full Billing Software

Want more? Create a free account and get access to full GST invoicing, inventory management, customer ledger, 16 templates, and more.

16 templatesGST reportsInventoryMulti-userPDF exportFree plan

Why use RCS Book Tools?

No Login Needed

All tools work without creating an account.

Mobile Friendly

Works perfectly on phone, tablet, and desktop.

Instant Results

Real-time calculations as you type.

100% Free

Always free, no hidden charges ever.

Need full GST billing software?

Create a free account for complete invoicing, inventory, customer management, 16 templates, and business reports.

Get Full Software Free