Compare two blocks of text and see additions, deletions, and changes highlighted. Runs entirely in your browser.
Whether you're reviewing code changes, comparing document drafts, or checking configuration files, this free diff checker highlights every difference between two texts. Additions appear in green, deletions in red, and unchanged lines in gray — giving you a clear picture of what changed at a glance.
Developers use diff tools to review code before committing, compare API responses, and debug configuration differences between environments. Writers use them to track edits between document drafts. This tool handles all of these cases directly in your browser with no file uploads or server processing required.
A text diff shows the differences between two pieces of text. Lines that were added are shown in green, removed lines in red, and unchanged lines in gray — similar to how Git displays changes.
The tool compares each line from the original against the corresponding line in the modified text. If a line differs, both versions are shown. Added or removed lines at the end are also highlighted.
Yes. This diff checker works with any plain text including source code, configuration files, markdown, and prose. It uses a monospace font for easy reading.