Tools
Find the right tool
Jump into a tool category, browse popular and recently added tools, or follow a cross-product workflow.
Financial Calculators
EMI, SIP, FD, tax and more
BrowseBills & Invoices
GST invoices, receipts and Indian bill formats
BrowseStamp Tools & Templates
Seals, templates and stamp image tools
BrowseSignature Tools
Draw, type, sign PDF and documents
Browse
Discovery
Popular tools
- EMI CalculatorMonthly loan EMI, interest and repayment schedule
- GST InvoiceRule 46–style tax invoice with CGST/SGST or IGST
- Gold Rate TodayIndicative India gold prices in INR per gram
- Rent ReceiptHRA-ready rent receipts with landlord details
- Sign PDF OnlinePlace signatures and dates on a PDF in your browser
- Create StampDesign a company seal or status stamp
- SIP CalculatorMutual fund SIP maturity and wealth estimate
- Draw SignatureHandwritten signature PNG — free, no signup
New & notable
Recently added
- Sign Documents OnlineSign Word and document files in the browser
- Stamp PDFPlace a seal image on a PDF privately
- Balance Transfer CalculatorCompare switching a loan to a new lender
- Freelancer InvoiceSimple invoice for independent professionals
- Stamp How-to GuidesShort task-focused stamp maker instructions
- APR CalculatorTrue cost of a loan including fees
Workflows
Tools that work together
Move from one real Nelstack tool to the next — bills, signatures, stamps and calculators in a single flow.
Business document workflow
Create a bill, sign the PDF, then place a stamp — all in the browser.
Personal finance workflow
Check rates, plan EMI, then compare the true cost of a loan.
HRA proof workflow
Estimate exemption, generate a rent receipt, and add a signature.