How does it work?

This tool keeps the first number in your text and replaces all other numbers with a sequence that increments from that first number. It's useful for:

Creating numbered lists with consistent increments
Generating sequential IDs or reference numbers
Fixing inconsistent numbering in documents
Creating test data with predictable number patterns

You can specify how much to increment by using the "Increment by" field. The default is 1.

Example

Original text

Item 5, Item 8, Item 12, Item 20
Price: $10.50, $15.75, $8.25, $22.00
Version 2.0, Version 3.5, Version 1.8
Room 101, Room 203, Room 305

After creating sequence (increment by 1)

Item 5, Item 6, Item 7, Item 8
Price: $9, $10, $11, $12
Version 13, Version 14, Version 15
Room 16, Room 17, Room 18

The tool works with:

Integers (e.g., 5, 6, 7, 8...)
Decimal numbers (e.g., 10.5, 11.5, 12.5...)
Negative numbers

How the sequence works:

The first number in your text is kept as is
The second number becomes: first number + increment value
The third number becomes: first number + (2 × increment value)
And so on...

Note: The tool preserves the format of each number. If the original number was an integer, the replacement will be an integer. If it was a decimal, the replacement will be a decimal.

Related Tools

Increment Numbers - Increment all numbers in text by a specified value
Decrement Numbers - Decrement all numbers in text by a specified value
Duplicate and Increment - Duplicate lines and increment numbers
Duplicate and Decrement - Duplicate lines and decrement numbers
Increment Duplicates - Increment numbers in duplicate lines

All Tools

See all available tools

Text tools

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Encode text to MD5 Hex Encode text to SHA-1 Hex Encode text to SHA-256 Hex Encode text to SHA-512 Hex Encode text to SHA3-256 Hex Encode text to SHA3-512 Hex Encode text as URL Decode URL text Encode text to Base64 Decode Base64 text Encode text to Hex Decode Hex text ISO Timestamp to Epoch Milliseconds Epoch Milliseconds to ISO Timestamp

Increment/Decrement

Increment all numbers Decrement all numbers Duplicate and increment numbers Duplicate and decrement numbers Create sequence Increment duplicate numbers

Sort

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Align

Align carets/selections Format text to columns/table Align text to left Align text to center Align text to right

Filter/Remove/Trim

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Convert/Minify

Convert Between Char and Int Minify JSON Minify JavaScript Convert Between JSON and YAML

Other

Reverse Letters Swap Words Swap Characters/Selections/Lines/Tokens Wrap or shift quotes Swap between quotes Straighten/Educate quotes Switch file path separators Select All Occurrences For All Carets Extend Selection in Different Mode Multi Replace Duplicate and Multi Replace Paste - camelCased Paste - and Keep Selections Create Border

unreliable.io

Create Sequence from First Number

Text with numbers to sequence

Result