Text Diff Checker

Compare two pasted texts or local text files and highlight exactly what changed.

How to use

1. Paste text or upload a supported text-based file on each side.
2. Choose whether to ignore letter case or whitespace, and optionally hide unchanged lines.
3. Review aligned edits, insertions and deletions with word-level highlighting.
4. Download a paginated landscape PDF comparison report when needed.

Features

• Aligned original and revised lines
• Word and punctuation-level change highlighting
• Separate changed, added and removed counts
• TXT, Markdown, CSV, JSON, YAML, XML, HTML, CSS and source-code file input
• Local, side-by-side PDF report generation

Good to know

• Text files are limited to 5 MB to keep comparisons responsive in the browser.
• Ignore whitespace when formatting changes are not relevant to the review.