Tools
Find the right tool
Jump into a tool category, browse popular and recently added tools, or follow a cross-product workflow.
Common workflows
- HRA claim → rent receipt → online signature → income tax / HRA calculators
- Mutual fund planning → SIP → step-up SIP → goal SIP → mutual fund returns
- Invoice → GST calculator → stamp or sign the PDF
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
BrowseWhistle
Chrome extension — aliases, fuzzy search, hotkeys
Browse
Discovery
Popular tools & recently added
High-traffic calculators, bills, stamps and signatures — plus the latest additions across Nelstack.
Popular tools
- FinanceEMI CalculatorMonthly loan EMI, interest and repayment scheduleOpen
- BillsGST InvoiceRule 46–style tax invoice with CGST/SGST or IGSTOpen
- FinanceGold Rate TodayIndicative India gold prices in INR per gramOpen
- BillsRent ReceiptHRA claim-style rent receipts with landlord detailsOpen
- SignatureSign PDF OnlinePlace signatures and dates on a PDF in your browserOpen
- StampCreate StampDesign a company seal or status stampOpen
- FinanceSIP CalculatorMutual fund SIP maturity and wealth estimateOpen
- FinanceGoal SIP CalculatorMonthly SIP needed to reach a target corpusOpen
- SignatureDraw SignatureHandwritten signature PNG — free, no signupOpen
Recently added
- WhistleNewWhistle - Bookmark Launcher and ManagerChrome extension with aliases, fuzzy search and pinned hotkeysOpen
- FinanceNewOld Gold Exchange CalculatorEstimate old gold credit, making, GST and cash for new jewelleryOpen
- FinanceNewGoal SIP CalculatorReverse-calculate monthly SIP for any target corpusOpen
- FinanceNewInflation CalculatorFuture cost of today's expenses for goal planningOpen
- FinanceNewFinancial Goal PlannerPlan multiple goals with inflation-adjusted SIPOpen
- SignatureNewSign Documents OnlineSign Word and document files in the browserOpen
- StampNewStamp PDFPlace a seal image on a PDF privatelyOpen
- FinanceNewBalance Transfer CalculatorCompare switching a loan to a new lenderOpen
- BillsNewFreelancer InvoiceSimple invoice for independent professionalsOpen
- StampNewStamp How-to GuidesShort task-focused stamp maker instructionsOpen
- FinanceNewAPR CalculatorTrue cost of a loan including feesOpen
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, design a seal, then stamp the document — 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.