Text Compare Tool

The tool compares two text passages to reveal where content is identical, changed, added, or removed. It serves editors, researchers, writers, and compliance reviewers who work with versioned documents, manuscripts, policy notes, or comparison tasks. It outputs a structured delta report and a similarity score to quantify overlap and changes between the two inputs.
Conceptually it normalizes inputs (Unicode-aware, case-insensitive optionally, trims whitespace), tokenizes into units (words or sentences), and applies a sequence-difference algorithm to align passages. The result includes a similarity percentage, and a sequence of matched segments with insertions, deletions, and moves highlighted as ranges. Outputs are plain text and a machine-readable delta suitable for downstream tooling.
Key features include dual-text inputs, precise delta blocks, a configurable comparison mode (exact match, loose similarity), language-agnostic handling, and export options (JSON or simple diff lists). Benefits include faster proofreading, audit-ready revision tracking, and reproducible comparisons for research or policy work.
Limitations: extremely large documents may require streaming or chunking; inputs that exceed memory limits can fail gracefully with a partial result. If both texts are empty, similarity is 0%. Unicode normalization ensures non-Latin scripts are handled correctly. Use cases span manuscript editing, academic writing, contract review, and version control for text assets.