Privacy Policy

Last Updated: May 30, 2026

At Zylo Tools ("we," "our," or "us"), we are deeply committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains in detail what information we collect, how we use it, how we protect it, and what rights you have regarding your data when you use our website at zylotools.com (the "Service").

By using Zylo Tools, you agree to the collection and use of information in accordance with this Privacy Policy. If you do not agree with any part of this policy, please discontinue use of our website.

1. Browser-Based File Processing

The core principle of Zylo Tools is that your files are processed entirely within your web browser. This is the most important privacy feature of our platform:

• PDF Tools: When you merge, compress, split, or convert PDF files using our tools, all processing occurs locally on your device using JavaScript libraries (pdf-lib, pdf.js). Your PDF documents are never uploaded to any server.
• Image Tools: Image compression, resizing, and format conversion (JPG, PNG, WebP) are performed using the HTML5 Canvas API directly in your browser. Your images never leave your device.
• AI Writing Tools: Our grammar checker, text humanizer, paragraph rewriter, and summarizer tools use browser-based JavaScript algorithms. No text is sent to any external API or server.
• Calculators & Converters: All calculations and conversions are performed using client-side JavaScript. No input data is transmitted or stored.

This means that the vast majority of data you provide to our tools (documents, images, text, numbers) never leaves your device and is never accessible to us or any third party.

2. Information We Collect

While our tools process data locally, we do collect certain limited information to operate and improve our website:

2.1 Automatically Collected Information

• Log Data: When you visit our website, our servers may automatically record information such as your IP address, browser type, operating system, referring URL, pages visited, and the date and time of your visit.
• Device Information: We collect information about the device you use to access our website, including device type (desktop, mobile, tablet), screen resolution, and browser version.
• Usage Data: We collect information about how you interact with our website, including which tools you use, how long you spend on each page, and navigation patterns.

2.2 Information You Provide Voluntarily

• Contact Form: If you contact us through our contact form, we collect your name, email address, and message content to respond to your inquiry.
• Feedback: Any feedback, suggestions, or bug reports you submit are stored to help us improve our services.

2.3 Information We Do NOT Collect

• We do NOT collect, access, or store any files you process using our tools (PDFs, images, documents)
• We do NOT collect text you enter into our AI writing tools
• We do NOT collect calculation inputs or results
• We do NOT require account registration or login
• We do NOT collect payment information (all tools are free)

3. Cookies and Tracking Technologies

We use cookies and similar tracking technologies to enhance your experience on our website:

3.1 Essential Cookies

These cookies are necessary for the website to function properly:

• Theme Preference: Stores your choice of light or dark mode (localStorage)
• Language Preference: Stores your selected language (localStorage)
• Recent Tools: Stores a list of recently used tools for quick access (localStorage)
• Favorites: Stores your favorited tools (localStorage)

3.2 Analytics Cookies

We use Google Analytics to understand how visitors interact with our website. Google Analytics collects information such as:

• Pages visited and time spent on each page
• Traffic sources (how you found our website)
• Geographic location (country/city level, not precise)
• Device and browser information

Google Analytics uses cookies to distinguish unique users and sessions. You can opt out of Google Analytics by installing the Google Analytics Opt-out Browser Add-on.

3.3 Advertising Cookies

We use Google AdSense to display advertisements on our website. Google AdSense and its partners may use cookies and web beacons to serve ads based on your prior visits to our website or other websites. These advertising cookies may collect:

• Information about your browsing activity across websites
• Demographic information (age range, gender, interests)
• Ad interaction data (impressions, clicks)

You can manage your ad personalization preferences through Google Ads Settings. You may also opt out of personalized advertising by visiting www.aboutads.info/choices.

4. How We Use Your Information

We use the collected information for the following purposes:

• Service Improvement: To understand usage patterns and improve our tools, features, and user experience
• Communication: To respond to your inquiries, feedback, and support requests
• Analytics: To analyze website traffic, identify popular tools, and understand user behavior
• Advertising: To display relevant advertisements through Google AdSense, which supports our ability to offer all tools for free
• Security: To detect and prevent abuse, fraud, or technical issues
• Legal Compliance: To comply with applicable laws and regulations

5. Third-Party Services

We use the following third-party services that may collect data:

• Google Analytics: Website traffic analysis and user behavior insights. Google Privacy Policy
• Google AdSense: Advertisement display and revenue generation. How Google uses information
• Google Fonts: Web font delivery. Google may log font requests.
• Unpkg CDN: Delivery of open-source JavaScript libraries (pdf-lib). No personal data is collected by this CDN beyond standard server logs.

Each third-party service operates under its own privacy policy. We encourage you to review their policies to understand how they handle your data.

6. Data Retention

• Files & Tool Data: Not retained at all — processed in your browser and discarded when you close the page
• Analytics Data: Retained according to Google Analytics default retention period (26 months)
• Contact Form Submissions: Retained for up to 12 months to address your inquiry and for reference
• Local Storage Data: Stored on your device indefinitely until you clear your browser data

7. Data Security

We implement appropriate technical and organizational measures to protect your information:

• HTTPS encryption for all website communications
• Browser-based processing ensures files never transit through our servers
• No user accounts or databases storing personal information
• Regular security reviews of our code and infrastructure
• CDN-level DDoS protection and security headers (X-Content-Type-Options, X-Frame-Options, Referrer-Policy)

8. Your Rights

Depending on your jurisdiction, you may have the following rights regarding your personal information:

• Right to Access: You may request information about what data we have collected about you
• Right to Deletion: You may request that we delete any personal data we hold about you
• Right to Opt-Out: You may opt out of personalized advertising and analytics tracking
• Right to Correction: You may request correction of inaccurate personal data
• Right to Data Portability: You may request a copy of your data in a structured format

To exercise any of these rights, please contact us at contact@zylotools.com. We will respond to your request within 30 days.

9. Children's Privacy

Our website is not directed to children under the age of 13. We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided us with personal information, please contact us and we will take steps to delete such information.

10. International Users

Zylo Tools is accessible worldwide. If you are accessing our website from outside the jurisdiction where our servers are located, please be aware that your information may be transferred to, stored, and processed in a different jurisdiction. By using our website, you consent to such transfers.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technologies, legal requirements, or other factors. We will notify users of significant changes by updating the "Last Updated" date at the top of this page. We encourage you to review this Privacy Policy periodically.

12. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:

• Email: contact@zylotools.com
• General Contact: Contact Page