Date Format Converter

WHAT IT DOES

Date Format Converter is a browser extension that allows you to enter a date and instantly convert it between multiple date formats. It supports ISO (YYYY-MM-DD), US (MM/DD/YYYY), European (DD/MM/YYYY), full text (e.g., "Monday, January 1st, 2026"), short text (e.g., "Jan 1, 2026"), and RFC 2822 formats. As you type, the tool detects the date from your input and displays all conversions in real time. Each converted format includes a one-click copy button, and the panel also includes quick-copy buttons for each format. The tool is ideal for developers, data analysts, international teams, and anyone who needs to convert dates between different formats for databases, APIs, spreadsheets, or documentation.

WHERE IT RUNS

Date Format Converter runs on any webpage, overlaying a floating panel that does not interfere with page content. It operates entirely in your browser as a lightweight userscript, using JavaScript's Date object for parsing and formatting. It works on any page, whether static or dynamic, with no external dependencies. All processing occurs locally—no data is ever sent to any server.

HOW TO USE

After installation, open the floating panel by clicking the extension icon. Enter a date in the input field using any supported format: YYYY-MM-DD (ISO), MM/DD/YYYY (US), DD/MM/YYYY (European), DD.MM.YYYY, or natural language (e.g., "January 1, 2026"). As you type, the panel instantly displays the converted date in all six formats. Click the "Today" button to auto-fill the current date. To copy any format, click the 📋 (copy) button next to that format, or use the quick-copy buttons at the bottom for ISO, US, EU, Full, and Short formats. The panel provides a clean, organized view of all conversions with clear labels for each format.

REAL MECHANISM — WHY THIS WORKS

Most date conversion tools require knowing the input format in advance or use complex date parsers that fail on ambiguous dates. Date Format Converter uses a multi-pass parsing strategy that attempts to parse the input using multiple common formats in order of specificity. The parser first tries ISO format (YYYY-MM-DD), which is unambiguous. Then it tries US format (MM/DD/YYYY), European format (DD/MM/YYYY), and dot-separated European format (DD.MM.YYYY). Finally, it falls back to JavaScript's built-in Date parsing for natural language dates. When a valid date is detected, the tool generates all six output formats using custom formatting functions. The ISO format uses zero-padded year, month, and day. The US and EU formats use zero-padded month and day with slash separators. The full text format uses month names, day names, and ordinal suffixes (st, nd, rd, th). The short text format uses abbreviated month names. The RFC 2822 format follows the standard email date format. All formatting uses the browser's local timezone. This approach ensures accurate, flexible, and fully private date conversion without requiring any external services or network access.

THE PANEL

The floating panel is fully draggable and remembers its position per site, snapping to the edges of the viewport when dragged near them. You can collapse the panel to a small icon to minimize screen distraction and expand it back with a single click. The panel is resizable from the bottom-right corner, giving you more space to view converted formats. Press the Escape key to close the panel instantly. The panel remains open across page navigation within the same domain, maintaining your current view state. All preferences—panel position—are saved per domain for a seamless experience.

PLEASE NOTE

Date Format Converter requires the free BotGentz extension to be installed and enabled, as it relies on the cross-extension messaging API provided by BotGentz for DOM access permissions. The date parser supports ISO (YYYY-MM-DD), US (MM/DD/YYYY), European (DD/MM/YYYY), and dot-separated (DD.MM.YYYY) formats, as well as natural language dates understood by JavaScript's Date constructor. All dates are interpreted in your browser's local timezone. No date data or usage information is ever sent to any server. The extension does not read, store, or transmit any personal information. It only parses and displays dates locally at your request.