Text Diff
Compare two blocks of text line-by-line and see additions, deletions and unchanged lines.
-The quick brown fox-jumps over the lazy dog.+The quick red fox+jumps over the lazy cat.
About the Text Diff Tool
The Text Diff tool compares two blocks of text and highlights the differences — line by line, with additions in green and removals in red. It's the fastest way to answer 'what changed between these two versions?' without firing up git or opening a full diff GUI. Perfect for comparing configuration files, contract clauses, translation drafts, code snippets, JSON responses and any other paired text.
Writers use it to see what an editor changed. Developers use it to compare log outputs or JSON responses when tracking down a regression. Lawyers and contract managers use it to compare document versions before signing. Translators use it to review edits on a translated draft. Because the diff runs entirely in your browser using the Myers longest-common-subsequence algorithm (the same algorithm git uses), results are accurate and match what you'd see in professional diff tools.
The tool handles both short snippets and longer documents up to several MB smoothly. For huge files (multi-MB source dumps), command-line tools like `diff` or `git diff` remain faster, but for everyday side-by-side comparison this tool is the quickest path.
How to use this tool
- 1Enter the required value in the input field above (domain, IP, URL, or text depending on the tool).
- 2Click the action button to run the check — results are computed instantly from our edge network.
- 3Review the parsed output, key fields and any warnings shown in the result card.
- 4Copy the result, share the page URL, or jump to a related tool from the sidebar to continue debugging.
Key features
- Line-by-line side-by-side diff
- Myers LCS algorithm — same as git
- Handles Unicode and multiline strings
- Runs in-browser — text never leaves your device