Diff Checker
Compare two texts and highlight differences (basic).
About the Diff Checker
This Diff Checker compares two versions of text side by side so you can see what changed before you commit, send a revision, or paste content into a CMS. It is built for writers, developers, and editors who need a quick visual check without opening a full Git client.
Paste the original text on one side and the updated text on the other. The tool highlights additions and removals so you can catch accidental deletes, wording drift, or missing lines before they go live.
When a diff helps
- Reviewing copy edits on landing pages, emails, or help articles
- Checking config snippets, JSON, or HTML fragments between environments
- Confirming a colleague’s rewrite did not drop an important sentence
- Spotting whitespace-only noise versus real content changes
How to use
- Paste the older (or “before”) version into the first box.
- Paste the newer (or “after”) version into the second box.
- Run the comparison and scan highlighted lines for unexpected edits.
- Copy the corrected version back into your editor once you are satisfied.
Practical tips
- Normalize line endings if one side came from Windows and the other from macOS/Linux.
- For code, keep indentation consistent so whitespace noise does not hide real changes.
- If the texts are huge, compare section by section for clearer results.
FAQ
Does this replace Git diff? No. Use Git for repositories; use this tool for quick paste-in checks of copy or snippets.
Is my text uploaded? Comparison runs in your browser session on this page — treat sensitive secrets carefully as with any online tool.