Free Online Tools for Small Business India — GST, Invoice, QR Code
Run your small business smarter with free tools built for Indian entrepreneurs. Generate GST-compliant invoices, calculate GST accurately, create salary slips, produce UPI QR codes, generate barcodes, draft NDAs, and track profits — all completely free, with no sign-up, and 100% private in your browser.
Why Indian Small Businesses Choose OptiDrop
Running a small business in India comes with unique challenges — from GST compliance and invoicing to managing payroll and generating payment QR codes. Most business software requires expensive subscriptions, and free alternatives often compromise on privacy by uploading your sensitive financial data to their servers.
OptiDrop provides professional-grade business tools that are specifically designed for Indian businesses, completely free, and process everything locally in your browser. Your GST numbers, invoice amounts, salary details, and financial calculations never leave your device. Whether you are a shop owner, freelancer, startup founder, or service provider, these tools help you handle day-to-day business operations without the cost or privacy risks of cloud-based software.
Essential Business Tools
GST Calculator
Calculate GST amounts accurately for any Indian tax rate. Supports CGST, SGST, and IGST calculations with both inclusive and exclusive modes. Add or remove GST from any amount instantly. Covers all standard GST slabs: 0%, 5%, 12%, 18%, and 28%.
Invoice Generator
Create professional, GST-compliant invoices in minutes. Add your business details, GSTIN, client information, line items with HSN/SAC codes, and GST breakdowns (CGST/SGST/IGST). Download as a polished PDF ready for your records and GST filing.
Quotation Generator
Generate professional quotations and price estimates for your clients. Add product or service descriptions, quantities, unit prices, and tax calculations. Download as a clean PDF or share digitally. Perfect for service businesses, contractors, and retailers.
Salary Slip Generator
Generate professional salary slips for your employees. Includes Indian salary components: Basic, HRA, DA, Conveyance, Medical Allowance, PF deduction, Professional Tax, and TDS. Download as a formatted PDF payslip for each employee.
Barcode Generator
Create barcodes for products, inventory, and retail. Supports Code 128, Code 39, EAN-13, UPC-A, and other common formats. Download as high-resolution PNG images for printing on product labels, packaging, and inventory tags.
NDA Generator
Draft a Non-Disclosure Agreement for business partnerships, client projects, and employee onboarding. Customize parties, confidentiality terms, duration, and jurisdiction. Download as a professional PDF ready for signing.
Profit Calculator
Calculate profit margins, markup percentages, and break-even points for your products and services. Input cost price, selling price, and quantity to get instant profit calculations. Essential for pricing decisions and financial planning.
UPI QR Code Generator
Generate UPI payment QR codes for your business. Enter your UPI ID, business name, and optional fixed amount. Download as a high-resolution image to print on your shop counter, invoices, or share digitally for instant payments.
Receipt Generator
Create professional payment receipts for your customers. Add your business details, customer information, item descriptions, amounts, and payment method. Download as a clean PDF receipt for your records and customer copies.
GST-Compliant Invoicing Made Simple
Since the introduction of GST in India, every registered business must issue GST-compliant invoices. This means including your GSTIN, the recipient's GSTIN (for B2B), HSN or SAC codes for goods and services, and a clear breakdown of CGST/SGST or IGST depending on whether the transaction is intra-state or inter-state.
The OptiDrop Invoice Generator handles all of this automatically. You enter your business details once, add line items with HSN codes and applicable tax rates, and the generator calculates the correct GST breakdown. The resulting PDF invoice includes every field required for GST compliance and filing.
- GSTIN fields for supplier and recipient
- HSN/SAC code support for every line item
- CGST/SGST/IGST automatic calculation based on transaction type
- Invoice numbering with customizable prefix and sequence
- PDF download ready for GST filing and record-keeping
A Complete Business Toolkit
OptiDrop provides a complete workflow for small business operations. Start by creating a quotation for a potential client using the Quotation Generator. Once they agree, generate a GST-compliant invoice with the Invoice Generator. When payment comes in, issue a receipt using the Receipt Generator. At the end of the month, generate salary slips for your employees. Throughout, use the GST Calculator to verify tax amounts and the Profit Calculator to track your margins.
Every document you create can be downloaded as a professional PDF, ready for printing, emailing, or filing. And because everything runs in your browser, you can use these tools from your shop, office, or home — even on your phone.
Your Business Data Stays Private
Financial data is among the most sensitive information a business handles. Your GST numbers, invoice amounts, employee salaries, and profit margins should not be stored on someone else's server. OptiDrop processes everything locally in your browser — your data never leaves your device.
- GSTIN numbers stay on your device. Your tax registration details are never transmitted to any server.
- Invoice data is local. All invoice details, client information, and financial amounts are processed entirely in your browser.
- Salary information is private. Employee salary details, PF numbers, and PAN information never leave your browser.
- No accounts to hack. Since there are no user accounts or databases, there is nothing for attackers to target.
Frequently Asked Questions
Start Using These Tools for Your Business
No sign-up. No downloads. No hidden costs. Pick any tool above and start using it immediately. Your business data stays on your device.
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