Text Diff Checker
Compare two blocks of text and see the differences highlighted line by line.
Enter text in both panels to compare.
How the Diff Checker works
This diff checker compares two blocks of text line by line, matches the unchanged lines, and highlights what was added or removed. Added lines are shown in green, removed lines in red, and unchanged lines stay muted.
Use it for release notes, small config files, copied logs, documentation snippets, prompts, and API examples. For very large source files or merge conflicts, a dedicated git diff tool will be more appropriate.
Practical diff examples
Config review: compare two environment snippets and spot added keys, removed values, or changed comments.
Documentation edits: paste the old and new text to check whether a release note changed more than expected.
Prompt debugging: compare two prompt versions line by line before testing them in an API call.
FAQ
Does this compare characters inside a line?
No. The comparison is line-based, so it is optimized for readable text blocks rather than fine-grained character diffs.
What can I compare with this tool?
Use it for release notes, config snippets, copied logs, prompts, documentation, API examples, and small text files.
Does whitespace matter?
Yes. Extra spaces and blank lines are part of the text, so they can appear as differences.
Should I use this for large source files?
For large repositories, merge conflicts, and exact code review workflows, use a dedicated git diff tool.