Sort Lines Generator Online — Free Tool
Instantly organize long text documents by sorting lines alphabetically or numerically in ascending or descending order.
Sort Lines
Sorts lines locally in your browser. Stable sort (preserves original order for ties).
Privacy note: All processing happens entirely in your browser. No data is sent to our servers.
About this tool
Sort lines alphabetically ascending or descending, with optional case-insensitive or numeric natural sort. Organize lists, configs, and exports without spreadsheet software.
Numeric sort treats '10' after '2' correctly unlike plain ASCII sort.
Common use cases
- Alphabetizing name or SKU lists
- Ordering config keys for readable diffs
- Preparing data for binary search or merge
- Cleaning messy copy-pasted bullet lists
How to use
- Paste one item per line in the input.
- Choose ascending, descending, or natural numeric sort.
- Toggle case sensitivity if needed.
- Copy sorted output.
This page is available at /tools/sort-lines/.
Understanding the result
- ASCII sort puts uppercase before lowercase unless case-insensitive mode is on.
- Natural sort orders embedded numbers numerically (item2 before item10).
- Blank lines sort to top or bottom depending on implementation.
- Locale-aware sort may differ from C locale—verify for accented characters.
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FAQ
Natural sort vs alphabetical?
Natural treats digit sequences as numbers. Plain sort compares character by character.
Reverse sort?
Descending option reverses order after sort key is computed.
Sort IP addresses?
Plain sort fails on IPs. Use specialized tools or zero-pad octets.
Is order stable?
Equal keys may keep relative order in stable sorts; duplicates can be adjacent after sort.