Text Difference
Compare two texts and identify added or removed lines.
In short
Compare two texts and identify added or removed lines.
Formula: Uses a longest-common-subsequence line comparison. Added lines use + and removed lines use −, so meaning never depends on color alone.
Your input is processed locally in your browser. It is not saved, logged, or sent with analytics.
Line differences
Enter a value to begin.
What this calculator does
Produce an accessible line-by-line difference with additions, removals, and summary totals.
Use it to turn Original text, Changed text into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this text tools calculation.
Inputs and what they mean
- Original text
- — text value.
- Changed text
- — text value.
How to use it
- Paste or enter content in the editor.
- Adjust any options for the result you need.
- Copy or download the locally processed output.
Formula
Uses a longest-common-subsequence line comparison. Added lines use + and removed lines use −, so meaning never depends on color alone.
Inputs used: Original text, Changed text.
Worked example
Compare two revisions
- Start with Original text: First line Old line, Changed text: First line New line.
- Apply the method: Uses a longest-common-subsequence line comparison. Added lines use + and removed lines use −, so meaning never depends on color alone.
- See one removed line and one added line with clear symbols.
Reading the result
The line differences appears in the output box and can be copied straight out. Nothing you paste leaves your browser.
Limitations and assumptions
- The result depends on the values you enter for this text difference; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Common questions
Is my input uploaded?
No. Your input is processed locally in your browser and is not sent to the server or included in analytics.
Can I use the text difference output elsewhere?
Yes. Use Copy, or Download when available, after reviewing the output.
How do I use the Text Difference?
Enter the required values for Original text, Changed text. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the Text Difference use?
Uses a longest-common-subsequence line comparison. Added lines use + and removed lines use −, so meaning never depends on color alone. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.
Can the Text Difference be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Cite this page
Free Calculator. (n.d.). Text Difference. https://freecalculator.tech/tools/text-difference
"Text Difference." Free Calculator, https://freecalculator.tech/tools/text-difference.
Text Difference — Free Calculator, https://freecalculator.tech/tools/text-difference