QikDrive

Diff Checker

Compare two blocks of text line by line and see exactly what changed. Comparison runs entirely in your browser — nothing is uploaded.

Original0 lines
Changed0 lines

Free Online Diff Checker

Spot every change between two versions of a document, config file, or snippet of code in seconds. The side-by-side view makes additions and removals obvious at a glance — all computed locally, with nothing ever uploaded.

Line-by-line precision

See exactly which lines were added, removed, or stayed the same, aligned side by side for easy scanning.

Ignore whitespace or case

Toggle these on to focus on meaningful changes and skip noise from reformatting or capitalization differences.

Instant live comparison

The diff updates as you type or paste — no button to click, no waiting.

Change counts at a glance

See the number of added, removed, and unchanged lines summarized above the diff view.

Swap or clear in one click

Quickly swap the two panels to compare in the other direction, or clear both to start fresh.

Completely private

Comparison runs locally in your browser using a longest-common-subsequence algorithm — your text is never uploaded.

Frequently asked questions

How do I compare two pieces of text?
Paste the original into the left box and the changed version into the right. The side-by-side diff updates instantly with additions in green and removals in red.
Can I ignore whitespace or case?
Yes — toggle "Ignore whitespace" or "Ignore case" to skip those differences and focus on meaningful changes.
Is my text uploaded anywhere?
No — the comparison runs entirely in your browser. Neither text ever leaves your device.
What diff algorithm does this use?
A longest-common-subsequence (LCS) based line diff — the same family of algorithm used by `diff` and Git.
Is there a size limit?
Each text is limited to about 2,000 lines to keep the comparison fast and your browser responsive.
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