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Compare two texts or code snippets. Highlights added and removed lines.
Original
Modified
Pro tip
Need code diffs in GitHub, GitLab, or Bitbucket? Git AutoReview reviews PRs with AI in 2 minutes — including explaining what changed and why it matters.
Paste the original on the left, modified on the right, hit Compare. Under the hood it runs the Myers diff algorithm — the same one Git uses — to find the minimal set of changes.
Green = added. Red = removed. White = unchanged context. The stats bar gives you the addition and deletion count at a glance.
Config versions, API response changes, SQL migration scripts, log output after a deploy — anything where reading line by line would take forever.
Git platforms show diffs natively, but sometimes you need to compare text that lives outside version control — environment variables, database output, documentation drafts, or email templates someone edited in a Google Doc.
Paste two pieces of text and it highlights what changed between them — added, removed, and modified lines. Same concept as git diff or the VS Code diff view, but works with any text from anywhere.
Yes. The diff checker works with any text, including source code in any programming language, configuration files, SQL queries, and plain text documents.
No. The diff runs entirely in your browser using the standard diff algorithm. Nothing is uploaded or stored.
This tool uses the Myers diff algorithm (the same one used by Git) via the open-source diff library. It produces the minimal set of changes needed to transform one text into the other.
For quick comparisons, yes. Paste any two texts and see the differences instantly. For full git workflow and AI-powered code review, Git AutoReview integrates directly into VS Code and your Git platform.
Yes. Copy the full content of each file and paste them into the left and right panels. The tool handles files of any size that fits in your browser memory.
Green with + means added. Red with - means removed. White means unchanged context. Same color scheme as GitHub and VS Code diffs.
Currently this tool shows line-level differences. If a single character changes on a line, the entire line is shown as removed and re-added. Word-level diff highlighting is planned for a future update.
Ctrl+Enter (or Cmd+Enter on Mac) to run the comparison, Ctrl+Shift+C to copy the diff output to your clipboard.
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