Why Does 10 Come Before 2 When Sorting? Alphabetical vs Numeric

The short answer

10 comes before 2 because an alphabetical sort compares text one character at a time, and the character "1" comes before "2". It never looks at the number as a whole. To sort numbers by value, use a numeric sort instead. In the Sort Text Lines tool, choose Numeric rather than A → Z, and 1, 2, 10, 25, 100 will come out in the order you expect.

What alphabetical sorting actually does

An alphabetical (or "lexicographic") sort compares two lines from the first character. If the first characters differ, that decides the order. Only when they match does it move to the second character, and so on.

Compare "10" and "2":

• First character: "1" versus "2".
• "1" comes first, so "10" is placed before "2". The second character is never checked.

The same rule explains why "100" comes before "25", and why "item 10" lands between "item 1" and "item 2".

Here is the same list sorted both ways in the tool:

Input order	A → Z result	Numeric result
10	1	1
2	10	2
1	100	10
100	2	25
25	25	100

How the Numeric mode works

The Numeric option reads the number at the start of each line and sorts by its value. That works well for:

• Plain numbers, one per line.
• Lines that begin with a number, such as "2 pears" or "10 apples".
• Decimals and negative numbers, such as 3.5 or -12.

For example, these lines:

10 apples

2 pears

1 fig

come out as "1 fig", "2 pears", "10 apples".

Where Numeric mode cannot help

Because it reads only a leading number, Numeric mode is not designed for:

• Numbers in the middle or at the end of a line, such as "item 10" or "Invoice 2026-10". The line does not start with a digit, so no number is found.
• Currency symbols in front, such as "₹500" or "$20". The symbol comes first, so the line is not read as a number. Remove the symbol, sort, then add it back with the Find and Replace tool if needed.
• Thousands separators, such as "1,250". Reading stops at the comma, so 1,250 is treated as 1. Remove commas before sorting.

Lines without a leading number end up in an unpredictable position, so keep a numeric list numeric.

How to sort a list in the right order

Open Sort Text Lines.

Paste your list with one item per line.

Pick a mode: A → Z, Z → A, Shortest first, Longest first, Numeric or Random shuffle.

Tick Remove duplicates if you want each line only once.

Click Sort Lines and copy the result.

Fixing "item 1, item 10, item 2"

Labels with numbers at the end are the hardest case, because neither alphabetical nor leading-number sorting handles them. Two practical fixes:

Fix 1: Pad the numbers with zeros

If every number has the same number of digits, alphabetical sorting gives the right order. "item 01", "item 02", "item 10" sort correctly because "0" comes before "1". This is why file names such as "photo_001.jpg" are common. Make all numbers the same width as the largest one: up to 99 needs two digits, up to 999 needs three.

Fix 2: Move the number to the front

Rewrite "item 10" as "10 item", sort with Numeric, then rewrite back. With a regular expression in the Find and Replace tool, the pattern (\w+) (\d+) and replacement $2 $1 swaps the two parts of each line. The guide to find and replace with regex explains how capture groups like $1 work.

Capital letters and accents

The A → Z mode uses your browser's language-aware comparison, not raw character codes. In practice that means:

• Upper and lower case sort together. "apple" and "Banana" come out as apple, Banana, not with all capitals first.
• When only case differs, lower case is placed first: "a" before "A".
• Accented letters sort near their plain letter, so "é" sits with "e" rather than after "z".

This is usually what people expect when sorting names or keywords. If you need strict upper-case-first order (as some programming tools do), convert everything to one case first.

Removing duplicates while sorting

The Remove duplicates option keeps the first copy of each line and drops exact repeats. "Exact" matters:

• "apple" and "Apple" are treated as different lines.
• "apple" and "apple " (with a trailing space) are also different.

If your list comes from a spreadsheet or a copy-paste, there may be hidden spaces. For more control, such as ignoring case or trimming spaces, use the dedicated tool covered in how to remove duplicate lines from a list.

Other sort modes and when to use them

• Z → A: reverse alphabetical, useful for newest-first lists when lines start with dates written as YYYY-MM-DD.
• Shortest first / Longest first: handy for spotting very long keywords or titles, or for finding empty and one-word lines.
• Random shuffle: good for casually mixing a list, such as quiz questions. It is not designed as a fair draw, so for raffles or prize winners use a method built for that, as explained in picking random numbers without repeats.

Dates: sort them as text the right way

Dates sort correctly as plain text only in year-month-day order with leading zeros: 2026-01-05, 2026-10-17. Formats like 17/10/2026 or 5 Jan 2026 sort by the day first and give a jumbled order. Convert dates to YYYY-MM-DD before sorting alphabetically.