Describe your work. Let AI build the invoice. Export a polished PDF — instantly. No account, no templates, no fees.
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Describe your project — AI fills everything in. Or fill manually. Export PDF when ready.
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Describe your project in plain English. AI generates professional line items, descriptions, and payment terms in under 3 seconds.
Export pixel-perfect, professional PDFs directly in your browser. No server, no watermarks, no email required.
InvoiceFlyer is free to use, forever. No limits, no sign-up, no hidden fees. If it helps your work, a coffee keeps us going.
InvoiceFlyer is and always will be free. If it saves you time, a coffee helps keep the lights on.
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The five elements every invoice needs — and the one mistake that delays 80% of payments.
A practical framework for setting rates, writing estimates, and never second-guessing your prices again.
Stop spending 20 minutes on invoice formatting. Here's how AI collapses that to seconds.
An invoice is a legally recognized commercial document sent by a seller to a buyer, itemizing goods or services provided and requesting payment. It is the foundation of every business transaction — whether you're a freelancer billing a client, a contractor submitting work, or a small business selling a product.
Invoices serve multiple purposes: they create a paper trail for accounting, establish a legal record of the agreement, trigger payment obligations, and serve as evidence in case of disputes. In many countries, maintaining proper invoices is a legal requirement for tax compliance.
Unlike a receipt (which confirms payment has been made), an invoice is sent before payment — it is a formal request for funds owed.
Types of Invoices
The most common type — used for one-time services or product sales.
Sent on a regular schedule for ongoing retainer or subscription work.
A preliminary bill sent before work begins, estimating the final cost.
Issued when a refund or discount is applied after the original invoice.
Include your full name or business name, address, email, and phone number. This identifies you as the seller and gives the client all they need to process the payment.
The client's name, company, billing address, and email. Many companies' accounts payable systems require a physical address to register a vendor before payment can be made.
Use a sequential numbering system (INV-001, INV-002). This makes tracking, accounting, and following up on unpaid invoices significantly easier for both parties.
Always specify exact calendar dates. "Net 30" means payment is due 30 days after the issue date. Never write "payment due upon receipt" — it's vague and delays payment.
Break down every deliverable into clear line items with description, quantity, unit price, and total. The more specific your descriptions, the fewer questions you'll get before payment.
Add applicable VAT, GST, or sales tax as a separate line. Show subtotal, tax amount, and grand total clearly. Ambiguous totals are one of the most common causes of delayed payments.
Tell the client exactly how to pay — bank details, PayPal, or a payment link. Export as a locked PDF so the formatting stays professional and the document can't be edited.
A unique sequential identifier for tracking and reference.
Specific calendar dates — never vague terms like "upon receipt."
Name, address, email, phone. Required for vendor registration.
Client name, company name, and billing address.
Description, quantity, unit price, and line total for each item.
Subtotal, applicable tax rate, and the final total due.
How and where to send payment — bank, PayPal, card link.
Optional but effective: "1.5% monthly fee on overdue balances."
Every day you delay invoicing is a day added to your payment timeline. Send the invoice the same day you deliver the work.
"Design work — $2,000" invites questions. "Homepage UI design, 3 concepts, 2 revision rounds — $2,000" closes them. Specificity speeds up approvals.
"Payment due upon receipt" is legally and psychologically weak. Always specify the exact date payment is expected.
Many companies cannot process a payment to a vendor without a physical address on record. Include all contact details, every time.
Most late payments are administrative oversights, not refusals. A polite but direct follow-up within 24 hours of the due date resolves the majority of cases.
Yes — completely free, forever. No account required, no usage limits, no hidden fees. You can generate and export unlimited PDF invoices at no cost. If it helps your business, you can optionally support us with a coffee, but it's never required.
No. All invoice data is processed entirely in your browser. Nothing is transmitted to our servers. Your client details, line items, and financial information never leave your device — the PDF is generated locally and downloaded directly to your computer.
Type a plain-English description of your work — "website redesign for a law firm, 5 pages, $3,500" — and the AI extracts structured invoice data: professional line items, descriptions, quantities, and payment terms. It uses LLaMA 3.3 via Groq's API, so results appear in under 3 seconds. You review and adjust before exporting.
InvoiceFlyer generates standard commercial invoices that contain all elements required for business use in most countries. However, specific legal requirements vary by jurisdiction — some countries require VAT registration numbers, specific wording, or official stamps. We recommend checking your local tax authority's requirements for your specific situation.
USD, EUR, GBP, CAD, and AUD are supported with a currency selector in the generator. The selected currency symbol appears on all line items and totals in the PDF export. More currencies can be added — let us know what you need.
Yes — InvoiceFlyer is designed for freelancers, contractors, consultants, and small businesses. It works for any type of service or product-based business. The AI auto-fill understands industry-specific work across design, development, construction, photography, consulting, and dozens of other fields.