Site-level questions about money, data, devices and feedback. Tool-specific gotchas live on each tool page instead, so nothing is answered twice.
Free, and no account or sign-up. Pages carry Google AdSense slots, but ads have no input into any calculation: the same input produces the same output whether you click an ad or not.
No. Most tools compute entirely in your browser — your input never leaves the machine and is never written to any storage we control. Three tools must ask something outside your browser to answer at all: WHOIS lookup queries domain registration data, HTTP status checker requests the URL you enter, and On this day reads a public dataset. Those requests go to this site's own service, not to third parties. Full details are in the privacy policy.
Yes — the layout is responsive, and the main tool pages are checked at a 400px viewport for horizontal overflow, tappable controls and readable results. If a specific page misbehaves on your device, the accessibility template below is the fastest way to tell us.
Send it through contact with the "[bug]" template: the page link, what you entered, what you expected, what happened, your browser version and the steps to repeat it. Wrong output is the highest-priority class of report here.
Please do — use the "[tool-request]" template on the contact page. Three questions decide it: is there real demand, does an existing tool already cover it, and can it be built to run in the browser without bloating the page. Ideas that fail are still recorded rather than quietly dropped.
On the contact page, using the "[a11y]" template: the assistive technology you use (screen reader, keyboard-only), the kind of barrier (keyboard trap, unreadable label, contrast, focus order), where it happens and what should happen instead. We do not claim WCAG conformance we have not measured, but we fix what is reported.
That is the archive kept from an earlier Chinese version of the site. The pages still work but are not maintained alongside the current version and are not recommended in the new navigation. Entry point: /legacy/.
The tools directory lists everything grouped by category — 117 tools at the moment. That number is read from the tool registry rather than written by hand, so it cannot go stale.
One person, on top of the open-source it-tools project (GPL-3.0), deployed on Cloudflare Pages. Single-maintainer means we promise neither a reply time nor an availability tier — terms of service says so plainly, and about has the rest of the background.
Not covered here? Ask directly, browse everything, or read what we do with data: Contact Us · All tools · Privacy Policy