Generate Underline Numbers

Use Generate Underline Numbers to instantly underline digits or any characters using Unicode combining marks. It’s perfect for creating stylized text, drawing attention to numbers, or formatting playful content. The tool updates live as you type, and you can customize how the underlining works only digits or all characters, spaced or compact, with optional prefix and suffix.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log, .json, .xml, .html, .md, .ini, .yaml, .css
Total characters: 0
Options
Add space between digits
Prefix with “→ ”
Suffix with period

How to Use:

  1. Type or paste your numbers or text into the Input Text box.
  2. Choose a file to import using the Choose File button if needed.
    Supported file types: .txt, .csv, .log, .json, .xml, .html, .md, .ini, .yaml, .css.
  3. Pick your underline style from the Underline Mode radio options:
    • Digits Only
    • All Characters
  4. Use the toggles to adjust formatting:
    • Add space between digits
    • Prefix with “→ ”
    • Suffix with a period
  5. The Underlined Output box will update automatically and flash to show changes.
  6. Use Copy Output to copy your result or Export to File to save it.
  7. Hit Clear All to reset everything and start fresh.

What Generate Underline Numbers can do:

This tool lets you add Unicode underlines to numbers or entire text inputs with full control. The Underline Mode radio lets you pick between targeting just digits or everything. The toggles let you format your output cleanly add spacing between characters, prepend a symbol, or end with a period.

The counter below the output helps track how long your final string is, and everything reacts in real-time. Importing a .txt or .json file will also instantly process its content.

Example:

Before:

12345

After (Digits only, spaced, with prefix):

→ 1̲ 2̲ 3̲ 4̲ 5̲

After (All characters, no spacing):

1̲2̲3̲4̲5̲

Common Use Cases:

You might use this when formatting stylized numeric output, marking up digits for visual effect in games, making captions, or emphasizing numbers in copy/paste-friendly content. Generate Underline Numbers is also handy for Unicode learners or anyone making decorative number-based text for fun or for posts.

Useful Tools & Suggestions:

If you’re styling numbers, Generate Strikethrough Numbers is a neat way to show deletions or crossed-out values. And for even more variety, Generate Superscript Numbers lets you float digits above the line instead.

Related Tools