Free tools for invoices, salary and loans
GST invoice and payslip generators, a salary calculator, an EMI calculator and a unit converter. They run in your browser: nothing is uploaded and there is no sign-up.
Pick a tool
- GST Invoice GeneratorItems, GST per line, CGST + SGST or IGST, total in words. Print or save as PDF.invoice, GST, bill, PDF
- Payslip GeneratorEarnings, deductions and net pay in words, on a printable salary slip.salary slip, payslip, PDF
- Salary CalculatorEstimate monthly take-home from CTC with basic, HRA, PF and optional ESI.CTC, in-hand, PF, ESI
- EMI CalculatorMonthly EMI, total interest and a full amortisation schedule with a donut chart.loan, EMI, interest
- Unit ConverterLength, weight, temperature, area, volume, speed and data, converted live.convert, metric, units
Need more than a calculator?
The same work, with saved records, reports and sync, in our own apps. On Google Play for Android, and on the web where a web version exists.
Browse all apps
Instobill
Invoice Maker (Zen GST)
Payslip Maker
EmployHub
Calculator Pro
Converter Pro
BudgeTrek
Free tools FAQ
Are these tools really free?
Yes. Every tool is free to use with no sign-up, no watermark and no limit on how often you use it.
Is my data safe?
Everything is calculated in your browser. The values you type are not sent to Zenocta or anyone else, and nothing is stored.
Do the tools work on a phone?
Yes. Each page is built for phones as well as desktops, and the invoice and payslip tools have an Edit tab and a Preview tab you can swipe between.
Where can I get the full apps?
The apps are on Google Play for Android, and several also have a web version. Each tool page links to the matching app.
Want a tool built for your business?
We build custom invoicing, payroll, finance and calculator apps. Book a free consultation and get a scoped, fixed-price proposal within 24 hours.