SIMPLE BY DESIGN
Your time stays
in your browser.
No account. No uploaded calendar. No advertising scripts.
What this tool does
All date and time calculations happen on your device. We do not send conversion inputs to a calculation API, store them in a database, or use cookies. Copy buttons access your clipboard only when you click them.
Sharing a result
A share link contains the conversion settings after the # character. This URL fragment is not part of the HTTP request sent to the host, but it is visible to anyone you give the link to and may be saved in browser history. Only share times you are comfortable disclosing.
Hosting and network data
Cloudflare serves this website and may process normal connection and request information, such as IP addresses, for delivery and security. This is separate from the conversion itself. See Cloudflare’s privacy policy.
Visit and performance statistics
On our published content pages, one Cloudflare Web Analytics script measures page visits, referring sites, browser/device categories and page performance. This is separate from the optional task-count checkbox below the converter. It does not use an analytics cookie or a persistent visitor ID; the provider processes request metadata, including IP addresses during delivery, under its own policies. Visit records do not identify unique people or prove that a conversion was completed.
The beacon removes query strings and URL fragments from location and referrer fields; conversion settings in share links are not included. Its request also contains a short-lived page-load identifier and browser/performance details. Script blocking or network failure may leave gaps and will not stop the converter. See Cloudflare’s collection and retention information; unsampled data is retained for seven days, with aggregated reporting available for up to six months. No task input or share text is supplied to the visit script by our application.
Referral diagnostics
The site can recognize a supported referring hostname or an explicit referral tag, such as utm_source=chatgpt. It stores only the source label, evidence type and successful “Convert time” submission count for this tab’s session in session storage. No dates, converted times, full referring URLs or unique visitor IDs are stored. This local diagnostic is not transmitted. Tagged links describe a claim about the source, not proof of an AI recommendation.
Automatic previews are not counted. This diagnostic is local to your browser; it is not a site-wide traffic report. It works even if no referral information is available, and conversion still works when browser storage is blocked.
View this session’s referral diagnostic
JavaScript is required to display local session information.
Optional task counts
The checkbox below the converter enables limited statistics for this tab only. It is off by default. When enabled, explicit conversion submissions, their success or error category, and successful copy/share-link actions send small records to our Cloudflare-hosted event endpoint. Automatic previews are not conversions. Turning it off discards unsent statistics and invalidates old task identifiers. Turning it on again starts fresh; old queued records do not resume. We try to stop in-flight requests, but a request already sent may still arrive and is not recalled or deleted.
Records contain a fixed page/event label, a coarse duration bucket, an error category, a test marker and a random task identifier used only in memory and valid for up to 30 minutes. They contain no entered dates or times, conversion inputs, share text, filenames, email addresses, full URLs or referrers. No cookie or persistent visitor ID is used. Task records are cleaned daily after 24 hours (so may remain up to about 48 hours); daily totals remain for 90 days. Cloudflare database recovery can retain deleted data for up to seven additional days on our Free plan.
Our application does not store IP addresses or user agents and does not enable request/body logs. Cloudflare still processes connection metadata to deliver and protect the service under its own policies. These limited records are not a guarantee of anonymous infrastructure. Delivery can fail or be blocked, and counts are capped; statistics never prevent a conversion or copy. We do not infer unique people or per-channel completion rates from these counts.
Advertising and future changes
Advertising is currently disabled. A public Google AdSense account verification meta tag and an ads.txt seller record identify our publisher account. They do not load advertising scripts, display ads, or send your conversion inputs to Google. They do not mean that this site has been approved to serve ads. Advertising changes will be described here before activation.