ToolZeno

Privacy Policy

Last updated: August 5, 2026 • Dedicated to client-side data privacy

1. Overview & Core Privacy Commitment

At ToolZeno, we understand that developers, security professionals, designers, data analysts, and creators handle sensitive information—including private API keys, database credentials, confidential PDF documents, source code, personal images, and proprietary spreadsheets. Your privacy is not an afterthought; it is the fundamental architectural pillar of our platform.

Unlike traditional utility portals that transmit your files, code, or tokens to remote servers for processing, ToolZeno operates on a 100% client-side execution model. All computations take place inside your device's browser memory (RAM) and local CPU/GPU cores.

2. The 100% Client-Side Guarantee Across All Tool Categories

No Server Transmission. No Data Uploads. Zero Remote Logs.Every single utility on ToolZeno is engineered to run locally inside your browser sandbox:

Developer & API Tools:JSON, XML, YAML, SQL, cURL, JWT, Regex, Cron, and Diff checkers format and parse code directly inside local Monaco Editor web workers.
Security & Cryptography:Passphrases, HMAC signatures, SSH/PEM certificates, and SHA/MD5 hashes rely exclusively on the browser's native window.crypto Web Cryptography API.
PDF Document Processing:PDF merging, splitting, rotation, page extraction, password protecting, and watermarking execute in-memory using WebAssembly and client-side JavaScript.
Image & EXIF Metadata Tools:Image compression, cropping, resizing, WebP/ICO conversion, and EXIF metadata stripping use client-side HTML5 Canvas and OffscreenCanvas APIs.
Data & Spreadsheet Converters:CSV and Excel to JSON, deduplication, line sorting, and case conversions execute directly on your local CPU without network requests.
SEO, CSS, & Financial Calculators:Schema markup generators, CSS Glassmorphism builders, contrast checkers, and mortgage calculators generate code 100% locally.

3. Information Collection & Storage Policy

ToolZeno does not require user accounts, email registration, passwords, or credit card information. You can use every tool freely and anonymously.

What We DO NOT Collect

We never capture, inspect, log, upload, or store your input strings, uploaded files, API tokens, passwords, photos, PDF pages, or output code. When you close or refresh your browser tab, transient in-memory data is purged automatically by browser garbage collection.

Local Storage Usage

We utilize standard browser localStorage solely to preserve your explicit UI preferences (such as light/dark mode theme selection and active tab configurations). You can clear this data at any time via your browser settings.

4. Cookies & Advertising Placeholders

To keep ToolZeno 100% free and accessible to everyone without paywalls, we display non-intrusive ad placeholders served by Google AdSense and reputable ad partners.

Third-party ad networks may place cookies in your browser to deliver contextual ads based on previous visits to this or other websites. These cookies do not have access to, nor can they inspect, any data, files, or strings entered into ToolZeno's utility inputs. You can manage or disable personalized cookies via your browser privacy settings or Google's Ads Preference Manager.

5. Website Traffic Analytics

We collect anonymized aggregate site metrics (such as page views, visitor count, referral sources, and device types) to evaluate platform performance, optimize page load times, and improve overall UX.

Traffic telemetry strictly records anonymized network headers (with truncated IP addresses) and is completely decoupled from tool interactions.

6. Verifying Privacy & Air-Gapped Execution

We encourage security engineers, developers, and privacy advocates to verify our client-side architecture at any time:

  1. Open your browser Developer Tools (F12 or Cmd+Option+I) and navigate to the Network tab.
  2. Execute any formatting, encryption, image processing, or PDF transformation operation.
  3. Observe that zero outbound XHR/Fetch network requests containing your data payload are transmitted.
  4. You can also disconnect your internet connection entirely after loading the page and continue using the tools offline.

7. Policy Updates

We may periodically update this Privacy Policy as new browser capabilities or tools are introduced. Any revisions will be reflected on this page with an updated "Last updated" date.