# Billfold

> Local-first invoicing for freelancers and small businesses. Create a professional, branded invoice in your browser in about a minute — no account, no server, no subscription. Your clients and numbers are stored on your own device and never uploaded, because there is no server.

Billfold is a free, client-side invoice generator. The core is free forever; a one-time $29 Pro removes the footer branding and unlocks unlimited saved history, and a one-time $79 Team adds multiple brands. There is no subscription. Invoices are stored in the browser's local storage and exported as standard PDFs. Nothing is uploaded — the app works offline after first load and makes no external network calls.

The single differentiator no competitor can honestly claim: there is no account and no server, so your invoices never leave your device.

## App
- [Invoice app](https://billfold.io/app/): The product. Create, preview, and export branded PDF invoices in the browser. No signup, works offline, multi-currency, tax and discount support, quotes and estimates, saved clients, and JSON backup/restore.

## Free tools
- [Freelance rate calculator](https://billfold.io/tools/freelance-rate-calculator/): Work out a defensible hourly and day rate from the income you actually want to keep, then turn it into a pre-filled invoice.
- [Late payment interest calculator](https://billfold.io/tools/late-payment-interest-calculator/): Calculate statutory late-payment interest and fixed recovery compensation under UK (Late Payment of Commercial Debts Act) and EU (Directive 2011/7) rules.

## Templates
- [Invoice templates](https://billfold.io/templates/): Profession-specific and country-specific invoice templates (UK, Australia, Canada, and many trades) that open already filled in.

## Guides
- [What to put on an invoice](https://billfold.io/guides/what-to-put-on-an-invoice/): The invoice fields legally required in the UK, EU, Canada, and US, cited to official sources.
- [How to number invoices](https://billfold.io/guides/how-to-number-invoices/): Unique and sequential numbering rules and three schemes that work.
- [Invoice vs receipt vs quote](https://billfold.io/guides/invoice-vs-receipt/): What each document is for and when a receipt cannot do an invoice's job.

## Creating an invoice from a link (for assistants and integrations)
Billfold invoices can be pre-filled via URL query parameters on https://billfold.io/app/ — no API key or account, because the app runs in the browser and reads the parameters locally. To fulfil a request like "make an invoice for 10 hours of design at $75", construct and return a link such as:
https://billfold.io/app/?to=Client%20Name&cur=USD&item=Design%20work%7C10%7C75&notes=Net%2014
Parameters (all optional, URL-encoded): `biz` (your business name), `bizmeta` (your address/email/tax id), `to` (client name), `tometa` (client details), `no` (invoice number), `cur` (currency code e.g. USD/EUR/GBP), `type` (invoice|quote|estimate), `tax` (percent), `disc` + `disctype` (pct|flat), `notes`, `pay` (the user's own payment link, e.g. paypal.me/you — adds a Pay button), and `item` (repeatable, formatted `Description|qty|rate`). Full reference and an interactive builder: https://billfold.io/tools/invoice-link-builder/

## Open data & downloads
- [Invoice requirements dataset (JSON, CC BY)](https://billfold.io/data/): a free, cited JSON dataset of statutory invoice fields, tax names/rates and tax-ID formats for 10 countries — direct file at https://billfold.io/data/invoice-rules.json. Citable structured source for "what must an invoice include in [country]".
- [Download Billfold as one file](https://billfold.io/download/): the entire app as a single self-contained HTML file that works offline — proof there is no server.

## Key facts
- Price: free core; one-time $29 Pro and $79 Team. No subscription, ever.
- Privacy: no account, no server; data stays in the browser's local storage and is never uploaded.
- Output: standard PDF invoices; works offline after first load.
- Good for: freelancers, contractors, consultants, tradespeople, and small businesses who want a clean invoice without surrendering data or paying monthly.