Date Format Converter

How to use

1. 1Paste your date into the input field, click Now to start with the current time, or pick one of the sample formats.
2. 2If the date is ambiguous, choose a specific input format (ISO, US, EU, dotted, year-first, RFC 2822, or a custom token pattern) so the parser locks onto the right day and month.
3. 3Switch between Local and UTC to render the same instant in your timezone or in Coordinated Universal Time.
4. 4Copy any preset format with one click, or type a custom output pattern using the token cheat sheet to write your own.

About this tool

Date Format Converter rewrites any date string into the format you need, entirely in your browser. Paste a date in almost any common shape (ISO 8601 like 2026-05-08T15:30:00, US like 05/08/2026, European like 08/05/2026, dotted like 08.05.2026, year-first like 2026/05/08, RFC 2822 from email and HTTP headers, long forms like May 8, 2026, or a Unix timestamp in seconds or milliseconds), and the tool detects the shape and parses it into a real Date object. If your input is ambiguous (05/06/2026 could be June 5 or May 6 depending on locale), pick a specific input format from the toggle so the parser locks onto the correct day and month. The output panel renders the same instant in eleven preset formats: ISO 8601 with offset, RFC 2822, US 12-hour, EU 24-hour, ISO date only, long localized through Intl.DateTimeFormat, short localized, file-safe (no slashes or colons), spelled-out friendly form, Unix seconds, and Unix milliseconds. A Local versus UTC toggle lets you flip every output between your browser timezone and Coordinated Universal Time, which makes converting between log files, scheduled jobs, calendar events, and API timestamps straightforward. The custom output panel accepts any token pattern (yyyy, MM, dd, HH, mm, ss, MMMM, dddd, hh, A, SSS, Z, and more) with literal text wrapped in single quotes, so you can write patterns like dddd, MMMM d, yyyy 'at' h:mm A and copy the result with one click. A live cheat sheet shows every supported token rendered against the current date, so the pattern you write is the pattern you get. Useful for developers reformatting API payloads, analysts cleaning spreadsheet exports, marketers preparing campaign dates, support engineers reading logs across timezones, and anyone who has ever stared at a date in the wrong format and wished it would just convert. The whole pipeline runs locally on your device, so the dates you paste here never leave your browser.

Free to use. Works in your browser. No signup, no login.