// contact

Contact

If something on jakup is not working, or you have thought of a tool that should exist, please tell us. Bug reports, tool requests, advertising and partnerships, and privacy questions all go to the same address. Every message is read.

What you can write to us about

• Bugs and errors — a result that looks wrong, or a button that does nothing. On a tools site this matters most, so it gets the highest priority.
• Tool requests and suggestions — what you need, or what is missing from a tool you already use. You can also post it on the request board, where others can add their views.
• Questions about a standard or formula — where a value depends on a size standard or a rule, the tool page says which one it uses. If it looks unclear or out of date, let us know.
• Advertising and partnerships — proposals for collaboration are welcome.
• Privacy — requests to see, correct or delete personal data are handled under our privacy policy (written in Korean). You can write to us in English.

How to report a problem quickly

Because the tools run inside your browser, the same tool can behave differently on different devices and browsers. Including these four things makes a problem much easier to reproduce:

• Which tool — pasting the page address is perfect
• What you entered when it went wrong — the exact input
• What you expected, and what happened
• Device and browser — e.g. iPhone Safari, Chrome on Windows

A screenshot helps most. If it shows a name, phone number or account number, cover it first with Image Redaction.

Worth checking first

• The result looks odd — each tool page explains its basis and answers common questions below the tool. A different basis gives a different value, so check that first.
• Where does my input go? — most tools process everything in your browser and send nothing to a server. You can check by disconnecting from the internet and seeing that the tool still works.
• Something I saved disappeared — favourites, saved positions and saved seals live only in that browser. Clearing browsing data or switching devices removes them.
• Do I need an account? — not to use the tools. An email check is only needed to post on the request board.

What we cannot help with

• Individual legal, tax or investment advice — the tools and explanations are general information, not advice. Please consult a professional about your own case.
• What a recipient will accept — photo sizes, seal formats and redaction rules differ by recipient. Please check with them directly.
• Processing files for you — we do not take files and work on them on your behalf. Not receiving your files is one of the principles this site is built on.

Response times

We aim to reply within two to three business days (Korea time). jakup is run by a very small team, so replies are sometimes slower, but no message goes unread. Bug fixes are deployed as soon as they are confirmed, and tool requests feed directly into what we build next.

Who runs jakup

jakup is planned, built and run by the jakup team. We write the tools and their explanations ourselves and do not republish content from elsewhere. More about the site is on the About page.

Email: jakup@jakup.com