Freelancers often need to generator invoices for their customers, some may have accounting, personal finance and billing solutions, others use invoice templates to generate invoices for their provided services.

However, an invoice generator app can save them time, and enables freelancers to keep track of their paid and unpaid invoices, regular customers, and issue legal and highly customizable invoices with no time.

This not only saves time, but it also ensures that the invoices are professional-looking and include all the necessary details such as the freelancer's contact information, description of the services, costs, and payment terms.

Moreover, many invoice generator apps also have additional features like tracking payments, which can be incredibly beneficial for freelancers to manage their finances.

If you are a freelancer, a coder, developer, SEO consultant or even an agency, this list is for you.

1. InvoiceLion

InvoiceLion is a free and open-source self-hosted invoicing software that enables anyone to create and export unlimited invoices with ease.

It is written using PHP and can be easily installed and run on any PHP-supported server.

  • Freelancers
  • Small businesses
  • Web Agencies
GitHub - gitter-badger/InvoiceLion: Free and open-source invoicing software
Free and open-source invoicing software. Contribute to gitter-badger/InvoiceLion development by creating an account on GitHub.

2. Manta

Manta is a free and open-source desktop app to create beautiful invoices. It supports multiple languages out-of-the-box including RTL languages.

However, it is important to note that the project did not receive any update for years.

Features

  • 🎚 Flexible form. You can turn on/off field and save as default setting.
  • πŸ— Drag & drop for reordering items. This makes editing easier.
  • πŸ“ Use SVGs for logo for better printing.
  • 🎨 Custom designed & highly customizable templates.
  • 🏷 Custom statuses for invoices.
  • πŸ“Š Export PDF for print or email.
  • πŸ”’Complete Privacy. You financial data stays where it belongs.
  • πŸ’― Totally Free.

Platforms

  • Windows
  • Linux: Ubuntu, Fedora, Debian, Arch, Linux Mint.
  • macOS
GitHub - hql287/Manta: πŸŽ‰ Flexible invoicing desktop app with beautiful & customizable templates.
πŸŽ‰ Flexible invoicing desktop app with beautiful & customizable templates. - hql287/Manta

3. Crater

Crater is a beautifully crafted web-based invoicing solution that can generate highly customizable invoices, keep track of your exported invoices, customers and many more.

You can view all of its amazing features in our post here.

Crater: Free Self-hosted personal Invoicing and expanse manager
Personal Invoicing is a tiresome work, especially when you have to do it for many clients. At the end, you will choose from a long list of personal finance and invoicing software to facilitate your work. Our topic of the day, Crater, is an addition to our collection of personal

4. Invoice Generator

The Invoice Generator is a React open-source project that allows for the addition of itemized items, configuration of quantities, prices, tax rates, and discounts.

It also enables the download of invoices as PDFs to your device, using jspdf-react to convert the data from canvas to PDF.

Features

  • Create, Modify, Delete, and View Invoices: Manage your invoices through a user-friendly interface.
  • Redux Store Integration: Efficient data handling through Redux for application state management.
  • Responsive Layout: Consistent and user-friendly experience across various devices and screen sizes.
  • LocalStorage Integration: Browser's LocalStorage used to store and retrieve data, providing persistence for invoices.
  • Error Handling: Robust error handling for maintaining application stability.
GitHub - Arbtrage/Invoice-Generator: Revolutionize your invoice management with our intuitive web app! Seamlessly create, edit, and view invoices on-the-go. Powered by React and Redux, it ensures a responsive, error-free experience. Embrace efficiency with data persistence through LocalStorage. Elevate your invoicing game today!
Revolutionize your invoice management with our intuitive web app! Seamlessly create, edit, and view invoices on-the-go. Powered by React and Redux, it ensures a responsive, error-free experience. E…

5. Invoice.js

Invoice.js is an open-source tool for generating PDF invoices using JavaScript. It utilizes pdfkit for invoice generation and md5 hashing to consolidate similar products on the invoice. Contributions to the code are welcomed and will be incorporated.

GitHub - snakysnake/invoice-js: Invoice.js: Generate Invoices as PDF using Javascript. Super easy code - open source.
Invoice.js: Generate Invoices as PDF using Javascript. Super easy code - open source. - snakysnake/invoice-js

6. OpenSourceBilling

OpenSourceBilling (OSB) is a free, open-source web application for easy invoice creation, payment receipt, client management, and tracking and reporting.

It offers features such as recurring invoices, PDF exporting, time tracking, accepting payments via Paypal and credit card, and data import from Freshbooks and Quickbooks. OSB supports multiple languages and currencies, providing flexibility and convenience.

GitHub - vteams/open-source-billing: Open Source Billing a super simple way to create and send invoices and receive payments online.
Open Source Billing a super simple way to create and send invoices and receive payments online. - GitHub - vteams/open-source-billing: Open Source Billing a super simple way to create and send inv…
OpenSourceBilling: Free Libre app to help you Simplify Invoicing and Online Payments
OpenSourceBilling or OSB is a powerful, open source web application for effortlessly creating and sending invoices, receiving payments, managing clients, and tracking and reporting. There’s no need to spend money on these services because OSB provides them all for free and with utmost ease. OSB can generate comprehensive reports

7. ATOS

ATOS is a free self-hosted open-source app that built for freelancers to generate and manager invoices for their clients easily. Moreover, it also allows freelancer developers, designers, seo link builders, to keep track of their customers, tasks and manage projects in productive manner.

Features

  • Client Management: Manage clients and companies from a unified dashboard.
  • Project Management: Track tasks and use ATOS for independent project management.
  • Task Management: Group tasks into collections and bill against billable tasks.
  • Invoicing: Generate detailed invoices from completed tasks.
  • Estimated Taxes: Estimate yearly tax burden with customizable tax files.
  • Reports: Create client reports with customized templates.
  • Open-source AGPL-3.0 License.
GitHub - jbelelieu/atos: Built by freelancer πŸ™‹β€β™‚οΈ, for freelancer πŸ•Ί 🀷 πŸ’ƒπŸΎ - ATOS is a locally hosted application that allows freelancers to easily manage clients/projects, generate invoices against backlogs, and estimate their personal taxes based on their invoiced income.
Built by freelancer πŸ™‹β€β™‚οΈ, for freelancer πŸ•Ί 🀷 πŸ’ƒπŸΎ - ATOS is a locally hosted application that allows freelancers to easily manage clients/projects, generate invoices against backlogs, and estimat…

8. BiznisBox

BiznisBox is a free, open-source web application for small and medium-sized businesses to manage invoices. It integrates with Stripe, PayPal for payments, and Nordigen for bank account data.

BiznisBox: Self-hosted Invoice Management For Small Businesses and Freelancers
BiznisBox is a web application designed to help small and medium-sized businesses manage their invoices. It is a simple and easy-to-use application that allows you to manage your business in one place. It is a free and open source invoice management software. It integrates with Stripe and PayPal for payments.
GitHub - biznisbox/biznisbox: Next generation business management software
Next generation business management software. Contribute to biznisbox/biznisbox development by creating an account on GitHub.

9. Miru

Miru is not just an invoicing app, it is an amazing time-tracker app that enables freelancer developers, coders, pentesters, and devops to bill their clients based on their working hours.

Miru is a feature-rich app that include a client portal, customer management, team management, report page, and integerate with many payment gateways as Stripe.

The app is in active development, so more features are coming in every major upgrade.

GitHub - saeloun/miru-web: Miru | Time Tracking and Invoicing and Employee Benefits. Built using Ruby On Rails and ReactJS
Miru | Time Tracking and Invoicing and Employee Benefits. Built using Ruby On Rails and ReactJS - saeloun/miru-web
Miru is a Self-hosted Time-tracker and Invoicing for Freelancers
Miru is an exceptional open-source web-based tool that has been meticulously designed to seamlessly handle time tracking, invoice management, and accounting tasks for small businesses worldwide. This powerful platform empowers organizations by efficiently streamlining their workflow and boosting productivity. Miru is built using Ruby on Rails and React. Features 1-

10. InvoicePlane

InvoicePlane is a free and open-source self-hosted invoicing solutions for freelancers and SMB agencies.

GitHub - InvoicePlane/InvoicePlane: A self-hosted open source application for managing your invoices, clients and payments.
A self-hosted open source application for managing your invoices, clients and payments. - InvoicePlane/InvoicePlane
InvoicePlane: An open-source, free invoicing system for teams
InvoicePlane is a self-hosted, free, and open-source clients, invoices, and payments management system. It is a simple useful app for freelancers, small and medium-size businesses. The projects got more than 100,000 downloads almost from all countries. If you are a team of two or more two members, InvoicePlane comes

11. React Invoice Generator

React Invoice Generator is an open-source project built as its name suggest using React.js to help developers create clean beautiful invoices with ease.

GitHub - tuanpham-dev/react-invoice-generator: React Invoice Generator allows you quickly make invoices and export them as PDF
React Invoice Generator allows you quickly make invoices and export them as PDF - tuanpham-dev/react-invoice-generator

12. QuickBill

QuickBill is a free open-source web-based app that enables anyone to create fancy customizable invoices easily.

However, it is important to note that the project did not receive any update for years, but it is still usable.

GitHub - PunitGr/QuickBill: Create unlimited invoices for free.
Create unlimited invoices for free. Contribute to PunitGr/QuickBill development by creating an account on GitHub.

13. Invoify

Invoify is a robust, web-based invoice generator application, expertly built using cutting-edge technologies such as Next.js 13, TypeScript, React, and the Shadcn UI library. It delivers an unmatched, effortless experience for creating and managing top-tier professional invoices.

GitHub - aliabb01/invoify: An invoice generator app built using Next.js, Typescript, and Shadcn
An invoice generator app built using Next.js, Typescript, and Shadcn - aliabb01/invoify

14. Billing-System

This is a cross-platform Java-based open-source billing system that enables anyone to create PDF invoice with few clicks.

However, It requires some technical knowledge to install and run.

GitHub - AmbalviUsman/Billing-System: A GUI Based Complete Store Billing System in java that generates Invoice of each sale.
A GUI Based Complete Store Billing System in java that generates Invoice of each sale. - AmbalviUsman/Billing-System

15. Invoicr

Invoicr is a free and open-source PHP invoice generator that is capable of churning out HTML, PDF, DOCX, and PNG invoices. It is a simple fuss-free package that will give developers a quick boost with their invoice generation needs.

GitHub - code-boxx/invoicr: Invoicr is a free and open-source PHP invoice generator that is capable of churning out HTML, PDF, DOCX, and PNG invoices.
Invoicr is a free and open-source PHP invoice generator that is capable of churning out HTML, PDF, DOCX, and PNG invoices. - code-boxx/invoicr

16. PDF Invoice Generator

This is a web-based PDF invoice generator that is written using PHP, Nette Framework.

GitHub - contributte/invoice: :memo: PDF invoice generator
:memo: PDF invoice generator . Contribute to contributte/invoice development by creating an account on GitHub.

17. React Invoice

This is a React app that can be easily installed on platforms like Vercel, to create and manage multiple invoices without the need for login or authentications.

GitHub - dev-geddy/react-invoice: Create and manage invoices in browser, print to PDF
Create and manage invoices in browser, print to PDF - dev-geddy/react-invoice

18. HTML Invoice Generator

This is a simple HTML page that enables anyone to create invoices easily offline without the need for a web-server.

It can also be installed on a local or remote server to create and manage invoices.

GitHub - Viaszx/Invoice_Generator: A simple web-based invoice generator.
A simple web-based invoice generator. Contribute to Viaszx/Invoice_Generator development by creating an account on GitHub.

19. Invoice-generator

Invoice-generator is a free self-hosted web app to generate invoices.

Features

  • Generates invoices in PDF format
  • Can Preview invoice before generating it
  • Auto-calculates the expenses of the purchases
  • Auto-saves generated invoices on the cloud
  • Maintains history of all your generated invoices
  • Can edit details of a generated invoice
  • Maintains collection of all your items (helpful in auto-completion)
  • Maintains collection of all your clients (helpful in auto-completion)
  • Can Export/Import an invoice data
GitHub - cherub7/Invoice-generator: A simple web application to generate invoices.
A simple web application to generate invoices. Contribute to cherub7/Invoice-generator development by creating an account on GitHub.

Read More

19 Free open-source self-hosted Invoicing and billing solutions
In a dynamic business environment invoices are created regularly and require custom workflow according to the enterprise business process. Invoice and order management solutions are built to manage billing and invoicing documents generally. Some of them manage orders and post-sale subscription billing. Most of ERP (Enterprise Resources Planning) solutions include
Invoicing - MEDevel.com
Collecting and validating open-source software for healthcare, education, enterprise, development, medical imaging, medical records and digital pathology