Paste two versions of an llms.txt file (or any plain-text file) and see what changed line by line. Works for any plain text content.
Paste the previous version here.
Paste the new version here.
It compares two blocks of text line by line and shows you which lines were added (green), removed (red), or unchanged (gray). Useful for reviewing changes to llms.txt, robots.txt, sitemaps, schema markup, or any plain-text file.
The tool uses a standard longest-common-subsequence (LCS) algorithm. It produces a minimal diff (smallest number of additions and deletions). For files under ~1,000 lines it's effectively instant.
All shows every line in both files, with unchanged lines in gray for context. Changed only hides runs of unchanged context and shows just the added/removed lines, with markers indicating where context was hidden.
Yes. The diff is purely text-based. It works for llms.txt, robots.txt, sitemap XML, JSON-LD, HTML, plain prose, anything line-oriented. It does not parse syntax, just compares lines as strings.
Yes. Lines that differ only in trailing or leading whitespace will appear as one removed + one added. The tool does not normalize whitespace; what you paste is what gets compared.
No. The diff runs entirely in your browser. Neither version is uploaded to a server.