Invoice

Invoice & Billing Tools

Calxo’s invoice tools cover the documents Indian businesses actually issue day to day: a plain invoice, a GST tax invoice, and the templates that come before and after one. Fill in the fields, watch the preview update, download a print-ready PDF. Nothing is uploaded or stored.

What you can generate here

  • Invoice generator — a full GST or non-GST invoice with line items, tax, and totals
  • GST tax invoice — the compliant format with GSTIN, HSN/SAC codes, and CGST/SGST/IGST split

Why these are different

Most free invoice tools online push you through a sign-up wall before letting you download, or watermark the PDF unless you pay. These run entirely in your browser. Nothing you type ever leaves your device.

Invoice TAX

Tax Invoice Format: GST Tax Invoice Fields, Rules & Free Generator

Complete guide to the GST tax invoice format in India. Mandatory fields, rules for B2B vs B2C, CGST/SGST vs …

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Invoice GST

E-Invoice GST: What It Is, Who Needs It, and How to Generate One

Complete guide to GST e-invoicing in India. Who must generate e-invoices, how to get an IRN, QR code …

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Invoice DEB

Debit Note Template: Free Format & Generator (GST Debit Note India)

Create a GST debit note online. Add the original invoice reference, reason for the increase, and revised …

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Invoice COM

Commercial Invoice: Free Template & Generator for Exports (PDF Download)

Create a commercial invoice for international shipments. Add exporter/importer details, HS codes, declared …

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Invoice BIL

Bill of Supply: Free Format & Generator for GST Composition Dealers

Create a bill of supply for GST-exempt goods or composition scheme sellers. Fill in details, download as PDF. …

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Invoice SER

Service Invoice Template: Free Format for Service Providers (PDF Download)

Create a professional service invoice online. Add services, hourly or project rates, apply GST, and download …

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Invoice REN

Rent Receipt: Free Generator & Format for HRA Tax Exemption (India)

Generate a rent receipt for HRA exemption. Add landlord name, PAN, address, and monthly rent. Download as PDF …

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Invoice PUR

Purchase Order Template: Free PO Format & Generator (PDF Download India)

Create a purchase order online. Add vendor details, line items, delivery terms, and PO number. Download as PDF …

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Invoice PAY

Payment Receipt Template: Free Generator & Format (PDF Download India)

Create a payment receipt online in seconds. Add payment details, mode, and reference. Download as PDF. Free, …

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Invoice DEL

Delivery Challan: Free Format & Generator (GST Delivery Challan India)

Create a delivery challan for goods movement. Add item details, vehicle number, and consignee. Download as …

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Invoice CRE

Credit Note Template: Free Format & Generator (GST Credit Note India)

Create a GST-compliant credit note online. Add the original invoice reference, reason, and adjusted amount. …

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Invoice QUO

Quotation Template: Free Online Quote Generator with GST (PDF & Excel)

Create a business quotation or price quote online. Add line items, apply GST, download as PDF or Excel. Free, …

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Invoice PRO

Proforma Invoice: Free Generator & Template with GST (PDF Download)

Create a proforma invoice online in seconds. Add line items, apply GST or leave it out, download as PDF or …

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Invoice INV

Invoice Template Word: Free .docx Download + Live Generator (India)

Free invoice template for Word. Fill in the live generator and export as an editable .docx, or download a …

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Invoice FRE

Freelancer Invoice Template: Free Generator for Indian Freelancers (PDF)

Free invoice template for freelancers in India. Add your services, apply GST if registered, download a …

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Invoice INV

Invoice Template for Excel: Free Editable .xlsx Download + Live Generator

Free invoice template for Excel. Download a ready-to-edit .xlsx with formulas built in, or use the live …

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Invoice INV

Invoice Generator: Free Online Invoice Maker with GST, PDF Download

Create a professional invoice online in minutes. Add line items, apply CGST/SGST or IGST, get an instant …

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Invoice GST

GST Invoice Template: Free Format with CGST/SGST, IGST & PDF/Excel Download

Free GST invoice template with GSTIN, CGST/SGST or IGST split, and HSN-ready line items. Fill in the live …

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About Calxo. Who runs this site

Calxo (calxo.in) is a free, ad-light calculator platform built for Indian users. Every tool covers EMI, SIP, GST, income tax, FD, PPF, salary, and conversions, using Indian rules, INR, and current tax slabs (not generic global formulas).

Publisher

Calxo is operated by Vignesh Sampath Kumar, an SEO Lead at PipeRocket Digital in Chennai and the founder of EVBlogs.in. Vignesh personally writes and reviews every calculator page.

Editorial standards

  • Formulas verified against RBI, Income Tax Department, CBDT, and GST Council sources
  • Updated the same week tax slabs or rules change
  • No paid placements; no affiliate links inside calculators
  • All calculations run in your browser; inputs are never stored

Contact

Corrections, suggestions, or partnership: avmedianews321@gmail.com

Based in India. Founded 2026.

Disclaimer: Calxo is a calculation tool, not financial, legal, or tax advice. For decisions that affect your money in any meaningful way, talk to a SEBI-registered financial advisor or a Chartered Accountant. We update formulas the same week laws change, but we're not liable for outcomes from calculator outputs. Read our Terms and Privacy Policy.