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Free Online Text Difference Checker

Compare lines and identify additions and removals.

Your input stays on this device. Processing is bounded; regex runs in a worker with a two-second timeout.

Result

How to use Text Difference Checker

Compare lines and identify additions and removals. Exact line membership is compared. The result reports lines unique to each side; it is not a positional edit-distance diff and repeated-line positions are not tracked.

  1. Set Input.
  2. Set Comparison text.
  3. Run the tool, review the result and its stated limitations, then copy or download if needed.

Example & practical use

Compare lines and identify additions and removals. The example below demonstrates Input; Comparison text.

Example input:
{
  "text": "one\ntwo",
  "other": "one\nthree"
}
Expected result (relevant fields):
{
  "identical": false,
  "removed": [
    "two"
  ],
  "added": [
    "three"
  ]
}

Features & result limitations

Exact line membership is compared. The result reports lines unique to each side; it is not a positional edit-distance diff and repeated-line positions are not tracked.

Frequently asked questions

What inputs does Text Difference Checker accept?

Input; Comparison text

How should I interpret the Text Difference Checker result?

Exact line membership is compared. The result reports lines unique to each side; it is not a positional edit-distance diff and repeated-line positions are not tracked.

Where does Text Difference Checker process my data?

Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.