What you type here never leaves your device. Every one of these tools is compiled to WebAssembly and runs inside this browser tab. There is no server to send anything to, and none of them makes a network request while it works. You can open your browser's network panel and use any of them: nothing goes out.
That matters here because of what people paste in: unpublished drafts, a client's keyword export, a press release under embargo, the plan for next quarter. None of it is transmitted, and none of it is kept anywhere but on your own machine.
There is no account, no key and no integration. The calendar planner plans and cannot publish; the hashtag tool has no popularity data because that would need a server; the link planner reads the pages you list rather than crawling a site; and the thumbnail checker reads your picture in this tab. Every one of them says so on its own result rather than leaving it to be discovered.
Character limits and image sizes are the published numbers as of the month printed on every result that uses them. Platforms change them without notice, and nothing here can check — which is exactly why the date is on the page instead of being implied. A stale figure given confidently is worse than no figure.
Each tool remembers your settings, and remembers your input while it is small
enough to be worth keeping, under about eight kilobytes. It is kept in your
browser's own localStorage, on your machine, and is never
transmitted. That is worth knowing before you paste an unpublished draft on a
shared computer — clearing your browsing data removes it, and a private window
keeps nothing at all. Your chosen language and theme are stored the same way.
A shared link carries the settings and the input, because that is what makes the result reproducible on somebody else's screen. A link to a headline comparison contains the headlines; a link to a keyword grouping contains the keywords. That is visible in the result before you share it.
No account, no sign-up, no cookies of our own, no analytics script, no fingerprinting, no error reporting. The pages carry no third-party JavaScript except the advertising described below.
These pages carry advertising, which is what pays for hosting them. An advertising network sets its own cookies and sees your IP address and the page you are on, in the same way it does on any other site. It does not see what you type into a tool: that text is never part of the page's markup and is never sent anywhere. If you would rather it saw nothing at all, an ad blocker breaks none of the tools.
The post and conversation pictures carry the word MOCKUP, drawn on the picture itself, and no setting removes it. They imitate no particular application: no logo, no colour scheme anybody would recognise, no verification tick and no platform name anywhere. A generic mockup belongs in a slide, a manual or a storyboard; a faithful imitation of somebody's real account is a tool for making fake evidence, and the difference is entirely in what the picture claims about itself.
Length, structure, contrast and how much detail survives a resize are facts. Whether anybody clicks, opens or watches is not, and nothing here says it is. The spam-word list in the subject-line checker is folklore and says so on the result: a real filter scores sending reputation, authentication and how people treat your mail, none of which any page can see.
The same tools are also built as a desktop application. It has no network code at all — not for updates, not for anything — and stores its settings in one small file in your user configuration directory.
If this ever changes, this page changes with it, and the change will be visible in the project's history rather than announced quietly.