Free Offline Invoice & Billing Software
for Small Business
Simple. Fast. Offline.
Create professional PDF invoices, manage clients and products, and run your billing entirely offline on Windows & Linux — no subscription, no cloud, no account needed.
Free Invoice Software Features
Everything you need to manage invoices professionally — 100% free, 100% offline
Offline & Secure
Your data never leaves your device. No cloud, no internet required.
Invoice Management
Create, edit, and manage invoices with status tracking and history.
Export to PDF
Generate polished, professional PDF invoices in one click. Share-ready instantly.
Client & Product Tracking
Store clients and products with built-in search, sort, and filter.
Multiple Templates
Classic, Modern, or Minimal — pick a template that fits your brand.
Easy Backup
One-click backup and restore to keep your data safe and portable.
Payment Tracking
Record partial or full payments, track outstanding balances, and download a PDF receipt for every payment.
Role-Based Access
Admin and standard user roles. Restrict deletes, settings, and backup to admins only.
Flexible Line Items
Override the unit price of any line item per invoice, or add one-off custom items on the fly — no product catalogue entry needed.
Custom Quantity Label
Rename the quantity column to match your business — use "Hrs" for services, "Units" for goods, or any label you need.
100% Offline Invoice App — No Internet, Ever
Unlike cloud-based tools, Invoiso is a desktop invoice app that installs directly on your Windows or Linux machine. All your customer data, invoices, and product catalogue live in a local database on your device — no servers, no syncing, no connectivity required.
Perfect for shops with unreliable internet, field workers, or anyone who values complete data privacy. Your business data is yours — not stored in someone else's cloud.
Free Billing Software for Freelancers & Small Business
Built for anyone who needs professional invoicing without the complexity or cost
Freelancers
Send professional invoices to clients without paying a monthly fee. All your client data stays private on your own machine — no cloud storage.
Small Businesses
Manage customers, products, and billing in one place. Works even when your internet is down or unreliable.
Consultants
Track multiple clients and generate branded PDF invoices in seconds. Duplicate recurring invoices with one click for repeat projects.
Shop Owners
Offline billing that works without the internet. Add a UPI QR code to every invoice so customers can pay instantly via GPay or PhonePe.
How to Create Free Invoices with Invoiso
Get started in minutes — no account, no setup, no internet required
Download & Install
Install Invoiso on Windows or Linux. No account or registration required.
Set Up Your Company
Enter your business name, logo, GSTIN, and UPI ID in settings. Takes under a minute.
Create an Invoice
Select a customer, add products, configure tax, and choose a PDF template.
Export & Share
Export a professional PDF with one click and send it to your client instantly.
Why Invoiso Is the Best Free Offline Invoice App
Invoiso is a cross-platform desktop invoicing app built for freelancers and small businesses. Manage customers, products, and invoices seamlessly — entirely offline. Your data never leaves your device, ensuring complete privacy and control.
Free & open source. If Invoiso saves you time, consider supporting its development.
Buy Me a CoffeeInvoiso in Action — Free Invoice Software Screenshots
Explore the intuitive interface designed for seamless invoice management
Invoiso Demo — Free Offline Invoice Software Walkthrough
Full walkthrough of Invoiso — from setup to your first invoice
Why Invoiso Is the Best Free Invoicing Software
How Invoiso compares to Wave, Zoho Invoice, and other cloud-based invoicing tools
| Feature | Invoiso ★ Best | Zoho Invoice | Wave |
|---|---|---|---|
| Price | Free forever | Limited free tier | Free (paid add-ons) |
| Works offline | ✓ | ✗ | ✗ |
| No account required | ✓ | ✗ | ✗ |
| Data stays on your device | ✓ | ✗ | ✗ |
| Linux desktop support | ✓ | ✗ | ✗ |
| UPI QR code on invoice | ✓ | ✗ | ✗ |
| Open source | ✓ | ✗ | ✗ |
| Payment tracking & receipts | ✓ | ✓ | ✓ |
| PDF invoice templates | 3 (Classic, Modern, Minimal) | Multiple | Limited |
Comparison based on publicly available information as of March 2026. Features may vary by plan.
Frequently Asked Questions
Quick answers to the most common questions
Is Invoiso completely free?
Yes — Invoiso is 100% free and open source. No subscriptions, no hidden fees, no premium tiers. Download it and use it indefinitely.
Does Invoiso work without an internet connection?
Absolutely. All your data — customers, products, and invoices — is stored locally on your device. No internet connection is ever required.
Does Invoiso support GST invoicing and UPI QR codes?
Yes to both. Invoiso supports GSTIN fields, HSN codes, and per-item tax rates for GST-ready invoices. You can also add a UPI payment QR code to every PDF — customers can scan and pay via GPay, PhonePe, or Paytm instantly.
Is my data safe? Can I back it up?
Your data never leaves your device — no cloud, no remote servers. Use Settings → Backup to export a database file you can restore at any time.
Can I track payments against an invoice?
Yes. Invoiso has built-in payment tracking. Record partial or full payments against any invoice, and the app automatically calculates the outstanding balance and updates the payment status (Unpaid, Partial, or Paid). You can also download a professional PDF receipt for each payment.
What People Say
Real feedback from real users
Get in Touch
Questions or feedback? We'd love to hear from you.
Typically responds within 24–48 hours