Your file stays on this device

Privacy Trendalyzer tools run in the tab you already have open. The file you pick is not uploaded to any external processing server. Image: Trendalyzer

Two rules, not a slogan

The claim User data never leaves the device. Workers only serve static files. A tool that needs a server is out of scope on cost grounds. Image: Trendalyzer

What counts as user data

What stays Document contents Spreadsheets and tables Filenames and form inputs Everything you provide stays on your device. None of these items leave this tab. Image: Trendalyzer

Tested, not merely claimed

Verification A unique sentinel is planted in every tool test. If that string appears in any network request, the build goes red. Image: Trendalyzer

Page loads are still ordinary

Hosting The host may see IP addresses and requested URLs, as any static site does. That is separate from the file you select inside a tool. Image: Trendalyzer

Ads are allowed, files are not

Later File contents Signed hosts only Signed, allowlisted third-party hosts may load later. They are not allowed to receive the file you chose. Image: Trendalyzer

Verified product standards

7 / 8 Every tool runs in current browsers and is verified with automated tests to ensure no user data leaves your device. How we review tools Image: Trendalyzer Trendalyzer is a static site of browser tools. For every supported workflow, the file or text you supply is read, transformed, and written back in your own browser. That payload is not posted to any external processing server. The distinction matters. Visiting any website still produces ordinary request logs at the host: IP address, user agent, and the URL you asked for. That is not the same as uploading a PDF, a spreadsheet, or a pasted table. The product rule is about the latter. Each interactive tool is covered by an automated browser test. The test seeds a unique sentinel into the input, runs the workflow, and fails the build if that sentinel appears in any request body or query string. Advertising hosts, if they are ever enabled, must be listed in a signed allowlist and must not receive user input. Tools are built with zero external data transfer and verified against rigorous privacy standards.

Read the policy, then try a tool

Next The about page states the claim in prose. The privacy policy covers hosting logs. The tools themselves are the proof. Image: Trendalyzer About Trendalyzer

Check the source, then make the call.

Reporting notes This visual briefing was reviewed by Trendalyzer desk. Full links, image credits, and editorial notes are available on the source page. Open sources and credits Read the full article Open the related page Published Aug 16, 2026 · Trendalyzer