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Text Compare (Diff Checker)

Popular Runs in Your Browser

Compare two text snippets, code files, or documents to instantly highlight additions, removals, and modifications with color-coded diffing.

Browser-based: this tool works on your device and does not send your input to an Alona Tool server. See the Privacy Policy for details.

Fast Processing

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Contract revisions

Input Scenario:

Original draft vs. Revised terms

Generated Result:

Color-coded inline diff with highlighted insertions and deletions

Executes the Myers diff algorithm directly in JavaScript to compute the shortest edit script between text A and text B.

No! The entire diff calculation executes locally in your browser memory.

Remove duplicate lines from lists while preserving order

Remove extra whitespace

Accurate words, characters, sentences, and paragraph…

Real-time character counting

Inspect code changes, revisions, and contracts side-by-side with high contrast green and red highlights.