Paste two text versions to see additions, deletions, and edits side by side.
Compare two texts with clear highlights for additions, deletions, and unchanged content. Runs entirely in your browser.
Comparing text before and after regex replacements? Pair this with our Regex Tester to validate matches, capture groups, and replacement logic first, then verify output differences here.
Recommended flow: run replacements in regex replace tool, inspect structural changes in this diff view, then validate final payloads with JSON Validator or format them using JSON Formatter.
FAQ tip: if your diff comes from pattern replacements, validate the source pattern first in Regex Tester.
A text diff compares two plain-text inputs line by line and highlights additions, removals, and changes.
Paste original and revised text to see a side-by-side or unified diff—ideal for configs, logs, and copy edits—not structured JSON.
For JSON objects use a JSON diff tool that compares parsed keys, not raw line text.
Enter the baseline version in the first panel.
Enter the updated version to compare.
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Text diff operates on lines and characters; JSON diff compares parsed object structure.
Large inputs are processed locally—very big files may slow the browser.
Part of Text Tools
More free tools for the same workflow.
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