Roman numerals look simple — I, II, III, IV — and the simplicity conceals a small but real body of rules. Whether you are typesetting a foreword, numbering the chapters of a thesis, labeling monarchs, marking items in an outline or generating the credits on a film, the form you use matters. Modern subtractive notation (IV, IX, XL) is the default in print, but classic additive notation (IIII, VIIII, XXXX) is what you will see on clock faces and ceremonial inscriptions. Pick the wrong one and the result reads as an error to the reader who knows.

Roman Numbering Generator builds the sequence in either form, with optional ordinal dots, lowercase or uppercase, and Unicode superscript or East Asian serif variants. Set a starting integer and a length, choose a notation, and get a clean list ready to paste into a document, a database, or a code file. Or convert an existing list of numbers to Roman numerals in one pass.

Underneath the buttons is the small amount of arithmetic the system actually requires — the seven canonical letters, the magnitude pairs, the subtractive rules — plus practical guidance on when to use which form. Everything runs in your browser; nothing is uploaded.

• Forward or backward: Generate I, II, III or III, II, I with one toggle, in case you are walking backwards through a chapter list.
• Any range, 1 to 3,999,999: Standard coverage up to 3,999 with the seven canonical letters, plus optional overlines for larger values when you need them.
• Modern and classic notation: Subtractive (IV, IX) or additive (IIII, VIIII), produced side by side so you can pick the right form for the context.
• Cardinal or ordinal: Toggle a trailing dot to mark list items (I., II., III.) rather than quantities.
• Four case variants: Uppercase (I, II), lowercase (i, ii), Unicode superscript (Ⅰ, Ⅱ) and East Asian serif (Ⅰ, Ⅱ).
• Bulk number-to-Roman converter: Paste a list of integers and get the matching numerals in one pass, ideal for naming chapters or credits.
• Live preview: The first dozen values render as you adjust settings, so you can confirm the notation before generating a long list.
• Three export formats: CSV, JSON and a plain numbered list with both the integer and the numeral.
• Copy or download: Take what you generate without leaving the browser, with nothing uploaded to any server.

1. Set the starting integer. 1 is the conventional beginning; start higher if you are continuing an existing sequence.
2. Set the length. How many numerals to generate — anything from a handful to thousands.
3. Choose notation. Modern subtractive (default) for general use, classic additive for clock-face and ceremonial contexts.
4. Pick a case. Uppercase for print and headings, lowercase for outlines and code, superscript where the typography calls for it.
5. Add ordinal dots if needed. Toggle the trailing dot to switch from quantities (IV, V) to list positions (IV., V.).
6. Or convert a specific list. Paste numbers into the converter for a bulk Roman equivalent of integers you already have.
7. Copy or download the result. CSV for spreadsheets, JSON for code, plain text for documentation.

Example 1 — Chapter numbering. Generate I through XXIV in uppercase modern notation for the twenty-four chapters of a textbook. The ordinal dot is left off, so each numeral reads as a count rather than a list position.

Example 2 — Clock-face labels. Switch to classic additive notation and uppercase. Output IIII for four, VIIII for nine, XXXX for forty — the form you would expect on a sundial or a ceremonial clock face.

Example 3 — Outline sub-points. Generate lowercase modern notation for sub-items: iv.1, iv.2, iv.3 form a layer under section IV by combining a Roman prefix with a numeric suffix. The case and ordinal convention match most academic styles.

Example 4 — Bulk conversion of credits. Paste the integers 1 through 50 into the converter and get a clean list to drop into a film credits spreadsheet. Round-trip is exact.

Example 5 — Large numbers with overlines. Toggle the extended range and generate values above 3,999. The output uses overlines to indicate thousands, in the classical style used for historical dates and large sums.

• Stop counting on your fingers: Generate hundreds of Roman numerals correctly in a single pass instead of working each one out by hand.
• Match any context: Modern subtractive notation for print, classic additive for clock faces, ordinal dots for outlines — all from the same generator.
• Stay in any case: Uppercase for headings, lowercase for outlines, superscript where the typography demands it.
• Bulk convert either direction: Numbers to Roman in one pass, with round-trip exactness for any value within the supported range.
• Export the shape you need: CSV for spreadsheets, JSON for code, plain text for documentation.
• Free and private: No account, no watermark, nothing uploaded.