Compare two text blocks line by line and instantly see matching lines, missing lines, and differences.
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When two versions of a document, list, or code file need to be checked against each other, manual reading is slow and error-prone. This tool compares every line in Text A against every line in Text B and sorts them into three groups: lines that appear in both, lines that only appear in Text A, and lines that only appear in Text B.
It compares whole lines by content, not by position - it doesn't pair up an edited line with its earlier version, so a changed line shows up as one entry in the "only in A" list and a separate entry in the "only in B" list rather than as a single "modified" line. Comparison is case-sensitive, trailing whitespace is ignored, and blank lines are excluded from all three lists.
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A text comparison tool that shows which lines two blocks of text share and which lines appear in only one of them. Paste two versions of a document, list, or code file, and this tool sorts every line into three groups - matching lines, lines only in Text A, and lines only in Text B - making it easy to spot what's shared and what's different without reading line by line.
Add the first text in one box and the second text in the other box.
The tool checks which lines are shared and which only appear in one version.
Inspect lines unique to Text A, lines unique to Text B, and exact matches.
Copy the comparison summary or download it as a text file.
Add the first version into the Text A box and the second version into the Text B box.
Check the Text A Lines, Text B Lines, and Matching Lines counters for a quick summary.
Scroll through Only in Text A, Only in Text B, and Matching Lines to see exactly which lines differ.
Copy the comparison summary or download it as a .txt file for a report or reference.
Best For
Input
Text A: "Introduction / The price is $10. / Conclusion / (blank line) / Thanks". Text B: "Introduction / The price is $12. / Conclusion / Thanks".Result
Text A Lines: 4, Text B Lines: 4, Matching Lines: 3 (Introduction, Conclusion, Thanks). Only in Text A: "The price is $10." Only in Text B: "The price is $12."The price line was edited, but the tool doesn't detect it as one modified line - it shows up as two separate, unrelated entries: one in "Only in Text A" and one in "Only in Text B." The blank line between Conclusion and Thanks in Text A is excluded from every count, since empty lines aren't compared.
If Matching Lines equals both Text A Lines and Text B Lines with nothing in the other two lists, the texts contain exactly the same lines.
Compare an old and new version of a list, like a keyword list or email list, to see exactly which entries were added or dropped.
Paste both versions to see which lines exist in only one of them, useful for catching accidental changes.
Compare a draft against the published version, keeping in mind that an edited line appears in both "only in" lists rather than as a single change.
Problem
Solution
A line edited even slightly, like a single word or number change, shows up as two unrelated entries - one in Only in Text A, one in Only in Text B - not as a single "modified" line.
Problem
Solution
Results are shown as three separate line lists (matching, only in A, only in B) in plain text - there's no inline green/red highlighting or side-by-side diff view.
Problem
Solution
Comparison is based on whether a line's content exists anywhere in the other text, not its position - reordering every line in Text B with no other changes would still show all lines as matching.
Problem
Solution
Comparison is case-sensitive, so "Total" and "total" are treated as different lines.
The Text A Lines, Text B Lines, and Matching Lines counters give you a fast identical-or-not answer before reading through the individual line lists.
Empty lines are excluded from comparison entirely, so differences in blank-line spacing between two texts won't show up anywhere in the results.
Trailing whitespace is ignored automatically, but leading whitespace on a line is compared as-is, so an indented and unindented version of the same line will show as different.
This tool answers "which lines are shared" - for a true sequential diff with modified-line detection, you'll need a dedicated diff tool.
Edited lines aren't paired or flagged as changes - they appear as separate, unrelated entries in the Only-in-A and Only-in-B lists.
Lines are matched by content only; reordering lines with no other changes produces zero differences in the result.
Differences are shown as three plain-text line lists, not a side-by-side or inline highlighted diff view.
There's no option to ignore capitalization - "Total" and "total" are treated as different lines.
Empty lines are filtered out before comparison and never appear in any of the three result lists.
Trailing spaces and tabs are stripped before comparing, but leading whitespace on a line is preserved and treated as a real difference.
Both compare two texts, but they answer different questions.
| This Tool (Text Compare) | A Sequential Diff Tool (e.g., Diffchecker-class tools) | |
|---|---|---|
| What it detects | Which lines are shared vs. unique to one side, by content | Which lines were added, removed, or modified, in sequence |
| Edited lines | Shown as two separate, unrelated entries (one per side) | Paired and flagged as a single "modified" line |
| Order/position | Ignored - only line content is compared | Considered - reordered lines are typically flagged |
| Highlighting | Three plain-text line lists | Color-coded, often character-level highlighting |
Which should you use?
Use this tool to quickly find which lines two texts share or don't share; use a sequential diff tool when you need to see exactly what changed within an edited line or care about line order.
The most common question is whether this shows a sequential, side-by-side diff with added/removed/modified markers the way some diff tools do. It doesn't - it sorts lines into matching, only-in-A, and only-in-B groups based on whether each line's content exists anywhere in the other text, regardless of position. The FAQ below covers exactly what counts as a match and what doesn't.
No. It sorts lines into matching, only-in-Text-A, and only-in-Text-B groups based on content. An edited line appears as two separate, unrelated entries - one in each "only in" list - rather than as a single flagged change.
Yes. "Total" and "total" are treated as different lines, with no option to ignore case.
Trailing spaces and tabs are removed before comparing, but leading whitespace on a line is kept as-is and can make two otherwise-identical lines count as different.
Empty lines are removed before comparison and never appear in the results, so differences in blank-line spacing between two texts won't be detected.
No. CoditTools's text compare tool runs entirely in your browser - neither text block is sent to a server.
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