Text Diff
Compare two texts and highlight line-by-line differences
About Text Diff
Compares an original and a modified text line by line after you click Compare, then shows the whole text in one unified view with additions and removals marked and a count of each. Only the first 300 lines of each side are compared, and everything runs in your browser. Useful for checking config edits, log output or two versions of a snippet.
Category: Text.
Frequently asked questions
What diff algorithm is used?
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A line-by-line comparison based on the longest common subsequence (LCS), computed with a dynamic-programming table. It finds a minimal set of added and removed lines, but it isn't git's Myers implementation, so changes may occasionally be aligned differently than in git diff.
What do the colors mean?
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Red lines (−) were removed — present in the left/original text but not in the right. Green lines (+) were added — present in the right/new text but not in the left.
Can I compare code files?
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Yes. Paste any text content including code. The diff is purely text-based with no language-specific parsing.
Does it ignore whitespace or highlight changes within a line?
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No. Lines are compared exactly, including case, indentation and trailing spaces, and a line that changed in any way appears as a removed line plus an added line, with no word- or character-level highlighting.