Roman numeral date converter
Turn years and dates into Roman numerals. Everything runs on your device.
- Your text is never uploaded
- Processed on your device
- Works offline
- Free, no sign-up
Empty
Result updates as you type
The result appears here as soon as you type or open a file.
Settings
Auto detects years and YYYY-MM-DD dates.
How it works
Type a year or date
Enter a year like 2026 or a date like 2026-11-05, or paste text containing years.
Choose auto, year or date
Auto detects both. Year only converts plain numbers 1–3999; Full date converts each part.
Copy or download
Copy the Roman numerals or download them as a TXT file.
Years 1 to 3999 in Roman numerals
Roman numerals use the letters I, V, X, L, C, D and M to write numbers from 1 to 3999. The standard subtractive forms are used, so 4 is IV rather than IIII, 9 is IX, 40 is XL, 90 is XC, 400 is CD and 900 is CM. For example, 2026 becomes MMXXVI, 1999 becomes MCMXCIX, and 44 becomes XLIV. Numbers outside 1 to 3999 have no standard Roman form and are left unchanged.
In Year only mode, every standalone number between 1 and 3999 in your text is converted, so a list of years converts in one go. In Auto mode the tool converts plain years and also recognises date patterns. Each conversion is Unicode-safe plain text, so the numerals copy correctly into documents, tattoos designs, book chapters and copyright lines.
Full dates to Roman numerals
In Full date mode, dates written as YYYY-MM-DD or YYYY/MM/DD convert each part separately, so 2026-11-05 becomes MMXXVI-XI-V with the same separator kept. Single-digit months and days without a leading zero work too, for example 2026/1/9 becomes MMXXVI-I-IX. Invalid months above 12 or days above 31 are left as they are and reported in the summary.
This format is popular for tattoos, wedding invitations, monuments and film credits where a classical look is wanted. Double-check month and day order before inking or printing: 2026-11-05 means 5 November 2026 in year-first notation. Paste only the dates you want converted if the surrounding text contains other numbers that must stay Arabic.
Private by design: convert without uploading
This roman numeral date converter runs entirely in your browser. Your years and dates are parsed on your own device with a small local script covering the standard 1 to 3999 range. Nothing is uploaded, nothing is saved after you close the page, and it works offline after the first visit. Check the live preview before you copy or download.
That makes it safe for personal dates such as birthdays and anniversaries you plan to use in designs. There is no sign-up, no watermark and no daily limit, and you can process up to 10 files of 500 MB each in one go. Close the tab when you have finished with sensitive material.
Questions
Is my input uploaded anywhere?
No. Conversion happens inside your browser. Your years and dates never leave your device.
Why do some numbers stay unchanged?
Only 1 to 3999 have standard Roman forms. Zero, negatives, decimals and numbers above 3999 are left as they are.
What date formats are recognised?
YYYY-MM-DD and YYYY/MM/DD, with or without leading zeros, such as 2026-11-05 or 2026/1/9.
Is it free?
Yes. Free to use, with no sign-up, no watermark and no daily limits.
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