Help & Instructions

1. Choose a tool

Search the English home page by tool name or task, or use the category filters. Each tool has a separate page.

2. Enter inputs and run

Choose files and output settings for file tools, dates or values for calculators, and names or number ranges for random tools. Check each page's formats, limits, and calculation rules. JavaScript is required for processing.

3. Check and save results

Check the content, format, and size of downloaded files. Save calculations together with their inputs. Depending on the tool, results can be saved as individual files, ZIP, CSV, TXT, or copied text. Keep original files separately.

Privacy and storage

File processing and calculations run in your browser. Random tools can optionally save names and settings in browser storage. Turn off that option to delete the saved data, especially on shared devices. Contact submissions are sent through the server and mail service; see the Privacy Policy.

Country and calculation rules

Financial tools keep the original KRW units and formulas. They do not include every product's taxes, fees, or changing rates. Age tools distinguish completed age, year age, and traditional Korean age. Date tools explain leap-year and month-end rules; they do not calculate public holidays or business days.

If a task fails

Check the supported formats and input ranges, then reduce file count, dimensions, or output quality. Record the page URL, browser, device, and reproduction steps for a problem report. Do not share private documents or sensitive screenshots.

Language selection

Use the Korean or English language link to open the corresponding page. There is no automatic redirect based on browser language or IP address. If an English counterpart is unavailable, the Korean page's English link goes to the English home page and is labelled accordingly.