Useful tools.
Clear methods.
ADEMN builds free utilities and practical guides for everyday work, from inspecting JSON to comparing fulfillment quotes.
Who maintains this website
This website, its tools, and its guides are maintained and published under the ADEMN name. You can reach the maintainer directly at beywsong@gmail.com to report an error, suggest an improvement, or ask about the site.
ADEMN is designed for developers, website owners, marketers, and people who need to check a calculation or organize a practical task. There is no account requirement or paid tier.
How to assess a result
A tool should explain what its answer means. Each tool page includes instructions, a worked example, and the assumptions or limitations that affect its results. Financial calculators describe their rate and payment conventions; date tools distinguish calendar days from elapsed clock time; website checks describe what the server can observe.
Compare the example with your own task before entering data. A result is conditional on your inputs and the stated method. A website score is a starting point for investigation, and an estimated payment or fulfillment cost is not a lender offer or a provider quote.
Our approach to guides and examples
Our guides are written around tasks you can perform with the tools. Worked examples use illustrative inputs, not customer records or claims about typical market prices. Each guide names its related tools, shows when it was reviewed, and links to primary references where a standard or external service is involved.
Examples are checked against the relevant tool behavior. We use automated checks for calculation edge cases, formatting, and public page links. These checks do not replace independent verification for a decision involving money, a contract, or a production system.
Corrections are welcome. If an example, result, or explanation is inaccurate, send the tool or guide URL, the expected result, and an explanation of the issue. Use fictional or redacted inputs. We review reports when maintaining the affected content and update its review date when the explanation changes.
Private by design
Text utilities, calculators, and converters process inputs in your browser. The 3PL comparison also saves a project in local browser storage so you can return to it. Public website diagnostics send the submitted target to our server; the application does not save diagnostic reports.
Our privacy policy explains local storage, hosting requests, and advertising choices. The terms of use describe appropriate use and the limits of results.
Start with a real task
Inspect a JSON payload, compare fulfillment quotes, or check a public website. Follow the related guides for worked examples and troubleshooting steps.