Free Utility Tools for Indian Sellers & Businesses
Process shipping labels, calculate GST tax splits, generate PDF invoices, and compute marketplace seller margins locally in your browser with zero server uploads.
Available Free Tools 10
Marketplace Shipping Label Cropper
Instantly crop bulky Flipkart, Amazon, and Meesho PDF invoice shipping labels into 4x6 thermal printer stickers or A4 4-in-1 layout completely offline in browser.
GSTIN Format & Checksum Validator
Verify 15-digit GSTIN checksums using official Modulus 36 algorithms offline, extract state jurisdiction codes, PAN numbers, and legal entity types.
E-Way Bill Limit & Validity Calculator
Check mandatory E-Way bill threshold limits for interstate (₹50k) vs intra-state state rules (MH/KA/DL ₹1 Lakh) and calculate distance validity days.
Forward & Reverse GST & CESS Calculator
Calculate CGST, SGST, IGST, Compensation CESS, and extract net base amount from gross tax-inclusive invoices instantly with Indian tax rate splits.
Instant Free GST Invoice Generator
Create professional, GST-compliant PDF cash memos and sales invoices with HSN codes, tax breakdown, bank details, and company branding directly in browser.
E-Commerce Seller Profit & Margin Calculator
Calculate real net profit per order after Amazon/Flipkart/Meesho referral fees, fixed fees, shipping costs, GST tax, TCS/TDS withholding, and return losses.
GST Late Fee & Interest Calculator
Calculate Section 47 return delay late fees (Nil vs Taxable) and Section 50 18% annual interest for GSTR-3B, GSTR-1, CMP-08, and GSTR-9 Annual filings.
HSN / SAC Code & Tax Rate Directory
Search official 5,000+ Indian GST HSN and SAC codes with 0%, 5%, 12%, 18%, 28% tax rate classifications and item descriptions.
GSTIN State Code & Prefix Identifier
Look up official 2-digit Indian GST state codes (e.g. 27 Maharashtra, 07 Delhi) to avoid Place of Supply tax filing mistakes.
ITC Mismatch & Tax Leakage Estimator
Estimate lost Input Tax Credit from non-filing vendors and calculate potential ITC reconciliation savings for GSTR-2B.
Frequently Asked Questions
Everything you need to know about our client-side free tool suite
Are these tools really 100% free and private?
Yes, absolutely! All calculations and PDF/Image operations happen strictly inside your web browser (client-side). No PDF files, customer addresses, or tax numbers ever leave your computer or get saved on any server.
Do I need to sign up or log in to use these tools?
No registration, login, or software installation is required. You can bookmark this page and access any tool instantly.
Which shipping label PDF formats are supported?
Our label cropper supports standard invoice PDF documents generated by Flipkart, Amazon Seller Central, Meesho, and general logistics partners, converting them into 4x6 thermal printer format or A4 4-in-1 layout.
Webmasters & Bloggers: Embed Our Free Tools
Add free GST calculators and GSTIN search widgets to your financial blog or CA website.