商务工具
发票、二维码和商务效率工具。
Free 商务工具 — browser-based and private
Every tool in 商务工具 runs in your web browser when possible, so files and text stay on your device. Pick a utility below, read the guide on each tool page, and use related links to move between similar features. No account is required to start.
Tools Directory
Business tools cover invoices, QR codes, passwords, and age calculations used by freelancers, retailers, and admin teams. They prioritize straightforward forms and instant downloads over enterprise complexity.
Use them when you need one polished output fast—an invoice PDF, a payment QR, or a secure password—without subscribing to a full platform.
What you can do here
- Branded invoice PDFs with line items
- QR codes for URLs, WiFi, and contacts
- Cryptographically strong password generation
- Exact age and date differences
Frequently Asked Questions
Are invoices legally binding?
A PDF invoice is a professional request for payment. Tax rules vary by country—include required tax IDs and consult an accountant for compliance.