Privacy Policy & Data Security Charter
Effective Date: October 2026 • Strict Zero-Server Storage Architecture
1. The 100% Client-Side Privacy Promise
At Quick Free Invoice (quickfreeinvoice.com), we believe that your business transactions, customer billing addresses, pricing structures, and financial revenue figures are private commercial secrets that belong exclusively to you.
Unlike conventional cloud-based accounting and invoicing platforms (which require account registration, collect user databases, and store customer lists on remote cloud servers), Quick Free Invoice is engineered as a 100% client-side web application. When you create an invoice, calculate sales tax, attach your company logo, or export a vector PDF, all mathematical calculations and rendering logic execute directly inside your computer or mobile device's local web browser engine.
We do not operate a backend database. We do not transmit your invoice line items, client email addresses, banking coordinates, or dollar amounts to any remote API or third-party cloud server.
2. Browser Local Storage (localStorage) Architecture
To provide a seamless user experience and prevent data loss when you refresh or close your browser, Quick Free Invoice utilizes your browser's native client-side storage sandboxes (localStorage and session memory).
Below is an exhaustive technical disclosure of all keys utilized by the application:
| Storage Key | Data Category | Purpose & Description | Storage Location |
|---|---|---|---|
| theme | UI Preference | Stores your visual theme preference ('dark' or 'light') to prevent screen flicker upon page load. | Local Browser Device Only |
| qfi_business_profile | Company Information | Saves your company name, email, phone, physical address, and Base64-encoded logo image for fast auto-fill. | Local Browser Device Only |
| qfi_recent_invoices | Draft Cache | Retains up to 15 recent invoice snapshots so you can duplicate or review past bills with 1 click. | Local Browser Device Only |
| qfi_labels_config | Custom Labels & Layout | Saves custom column titles, header alignment options, and currency prefix/suffix layout settings. | Local Browser Device Only |
This data remains isolated inside your browser sandbox under standard Same-Origin Policy (SOP) protections. No other website or domain can read these keys. You can permanently wipe this memory at any time by clicking "Reset All" or clearing your browser cache.
3. Google AdSense & Advertising Disclosures
Quick Free Invoice is maintained as a 100% free tool supported through transparent, non-intrusive contextual advertising delivered by Google AdSense.
Google, as a third-party vendor, uses cookies to serve advertisements on our website:
- Google's use of advertising cookies enables it and its partners to serve ads to our users based on their visits to our site and other destinations across the Internet.
- Users in the European Economic Area (EEA), United Kingdom, and Switzerland are presented with a Google-certified Consent Management Platform (CMP) dialog upon first visiting the site to select their consent preferences for personalized vs. non-personalized advertising.
- You may opt out of personalized advertising by visiting the Google Ad Settings Portal. Alternatively, you can opt out of third-party vendor cookie usage by visiting aboutads.info or youronlinechoices.com.
4. European Union GDPR Compliance (Articles 12–23)
The General Data Protection Regulation (Regulation (EU) 2016/679) establishes strict individual privacy rights. Quick Free Invoice satisfies GDPR requirements by adopting the highest privacy standard possible: Data Protection by Design and by Default (Article 25).
- Right of Access (Article 15): All data you enter is visible directly in the user interface and stored in your device's browser memory.
- Right to Erasure / "Right to Be Forgotten" (Article 17): Because we store no data on remote servers, you can exercise immediate total erasure simply by clearing your browser cache or clicking "Reset All".
- Right to Data Portability (Article 20): You can export your invoice data at any time by downloading vector PDF files or backing up your JSON configuration.
- Zero Data Selling: We do not sell, rent, broker, or monetize user data under any circumstances.
5. California Consumer Privacy Act (CCPA / CPRA) Disclosures
For California residents under the California Consumer Privacy Act (CCPA) and California Privacy Rights Act (CPRA):
- We do not collect personal identifying information (PII) on remote servers.
- We do not sell or share personal information with data brokers or marketing lists.
- We do not collect or process sensitive personal information, biometric identifiers, or precise geolocation coordinates.
- California consumers have the right to equal service and non-discrimination regarding the exercise of privacy rights.
6. Edge Infrastructure & Network Security
Quick Free Invoice is hosted on Cloudflare Pages, leveraging Cloudflare's globally distributed Edge CDN across 275+ global cities:
- Transport Layer Security (TLS 1.3): All static asset deliveries are encrypted using modern cryptographic ciphers with automated HTTPS enforcement and HTTP Strict Transport Security (HSTS).
- Zero Server Attack Surface: Because there are no backend application servers, SQL databases, or server-side session cookies, the application is fundamentally immune to SQL injection, remote code execution (RCE), or unauthorized centralized database leaks.
7. Privacy Office & Contact Information
If you have technical questions or regulatory inquiries regarding our data architecture or privacy practices, please contact our Data Protection Officer directly:
Email: contact@quickfreeinvoice.com
Online Form: Contact & Support Page
Physical Entity: Quick Free Invoice c/o Compile Future Network
Frequently Asked Questions
Everything you need to know about our zero-signup billing engine, client-side privacy, and professional PDF generation.