List Number Style Converter

About the List Number Style Converter

Our free online List Number Style Converter takes your existing numbered list and converts it to a different numbering style. Convert 1. 2. 3. to i. ii. iii. or A. B. C. or I. II. III. Supports decimal, lowercase and uppercase Roman numerals, lowercase and uppercase letters, and more. Automatically detects your current numbering style and renumbers sequentially. Perfect for reformatting academic outlines, document sections, and multi-level lists. All processing runs in your browser.

Features

Detect and parse existing number styles
Convert to decimal, Roman, letters, and more
Lowercase and uppercase options
Preserve item text and indentation; output markers use a period
Multi-level list support (auto-detect levels)
Real-time preview
100% private — browser-only processing

How to use this tool

The List Number Style Converter works right in your browser — no signup, no installation. Follow these steps:

Paste your numbered list into the input area.
The tool auto-detects the current numbering style.
Select the target numbering style from the options.
Copy the converted list.

Frequently asked questions

What numbering styles are supported?

Decimal (1,2,3), lowercase Roman (i,ii,iii), uppercase Roman (I,II,III), lowercase letter (a,b,c), uppercase letter (A,B,C).

How are nested levels handled?

Each indentation width has its own counter. When a parent item changes, deeper levels start again at 1. Keep indentation consistent.

Can it detect the current style automatically?

Yes. The tool analyzes the first few lines to determine the current numbering style and format.

Using the results

Bulk text edits that would take ages by hand happen in one step with the List Number Style Converter. It applies your changes the moment you make them, entirely in the browser, so your content stays on your device and the result is ready to copy immediately.