Top 20 Free Invoice Generators on GitHub (2026)

I spent a weekend digging through GitHub looking for the best free, open-source invoice generators. Not the ones that say "free" then ask for your credit card. Actual free tools.

I looked at 50+ repositories, sorted by stars, last update, and whether they actually work without signing up. Here's what I found — ranked by what matters to freelancers.

🏆 The Rankings

Rank	Tool	Stars	Type	Best For
1	InvoiceShelf	1,706	Full App	Small businesses
2	Accountill	1,688	Full Stack	MERN stack fans
3	Easy Invoice PDF	887	PDF Generator	Quick PDFs
4	React Invoice Generator	671	React Component	React developers
5	Simple HTML Invoice	1,719	HTML Template	DIY HTML/CSS
6	Pranav's Generator	331	TypeScript	Modern stack
7	React PDF Invoice	291	React + jspdf	PDF export
8	InvoiceGenerator (Python)	181	Python Lib	Python automation
9	PDFKit Invoice	230	Node.js	PDFKit users
10	HTML to PDF	120	Puppeteer	HTML → PDF
🎯 BEST FOR "JUST GIVE ME A PDF NOW"
⭐	PingPaid Invoice Generator	New	Web App	Zero friction

🔍 What I Tested

For each tool, I checked:

• ✅ Does it work without creating an account?
• ✅ Can I download a PDF?
• ✅ Is it actually free (no "trial" bait)?
• ✅ Does it look professional enough to send to clients?
• ✅ Is the code open source?

💡 The Problem With Most "Free" Tools

Here's what I kept running into:

"Free" tools that aren't free: Many repos link to SaaS products with "free tiers" that require signup, email verification, and eventually a credit card. The GitHub repo is just a landing page.

Over-engineered solutions: Some tools need MongoDB, Redis, Docker, and a PhD in DevOps to run locally. Great for learning, terrible for "I need an invoice in 5 minutes."

HTML templates without logic: Beautiful templates, but you still need to manually calculate totals, taxes, and due dates. That's not a tool — that's a prettier spreadsheet.

🚀 What I Actually Use

I ended up building PingPaid because I couldn't find something that hit the sweet spot:

• Zero signup (seriously, none)
• Instant PDF download
• Professional templates
• Late fee calculator (because clients are late)
• Break-even calculator (because math is hard)
• Hourly rate calculator (because undercharging sucks)
• Works on mobile

All the invoice generator code is open source on GitHub too — fork it, customize it, host it yourself. No strings.

📊 Quick Comparison

Feature	InvoiceShelf	Accountill	PingPaid
Sign up required	Yes	Yes	❌ No
Self-hostable	✅	✅	✅ (GitHub Pages)
PDF Export	✅	✅	✅
Mobile friendly	✅	✅	✅
Late fee calc	❌	❌	✅
Hourly rate calc	❌	❌	✅
Break-even calc	❌	❌	✅
Setup time	30 min	30 min	0 min

🛠️ Other Tools Worth Mentioning

Besides invoice generators, I found some solid calculators:

• Accrue.js — Loan/interest calculator (110⭐)
• RoundAndSplit — Tip calculator, iOS/Android (48⭐)
• Tip Calculator App — Frontend Mentor challenge (41⭐)

But honestly? PingPaid's tip calculator, interest calculator, and late fee calculator are simpler and work instantly.

📣 Try It

Open source · No signup · No ads · GitHub

Last updated: June 2026. Star counts are approximate. This is an independent comparison — not sponsored.
Found a tool I missed? Submit a PR.