René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Does Code Diff work like git diff?","acceptedAnswer":{"@type":"Answer","text":"Conceptually, yes — both compute a line-level diff with a longest-common-subsequence style algorithm and classify each line as unchanged, added, removed, or changed. This tool runs entirely in your browser on two pasted blocks of text rather than on git objects, and its Copy diff output uses +/- line markers for readability only — there are no ---/+++ file headers or @@ hunk lines, so it isn't a patch file you can feed to git apply."}},{"@type":"Question","name":"Is my code sent to a server?","acceptedAnswer":{"@type":"Answer","text":"No. The comparison runs entirely client-side in your browser; nothing typed or pasted into either box is transmitted, logged, or stored anywhere — refresh the page and both inputs are gone."}},{"@type":"Question","name":"Why is only one word highlighted instead of the whole line?","acceptedAnswer":{"@type":"Answer","text":"Every line marked changed also runs through a second, word-level diff that tokenizes it into words, whitespace, and punctuation, then highlights only the tokens that actually differ. On a single line longer than 400 tokens — a minified bundle on one line, for example — that step is skipped and the whole line is highlighted instead, to keep typing responsive."}},{"@type":"Question","name":"What exactly does Ignore whitespace do?","acceptedAnswer":{"@type":"Answer","text":"It collapses runs of whitespace to a single space and trims both ends of each line before the two sides are compared — so const  x = 1; and const x = 1; count as equal. Only the comparison changes; the panes still display your original spacing. Combine it with Ignore case and lines that differ solely in spacing or capitalization stop being flagged entirely."}},{"@type":"Question","name":"How large a file can I compare?","acceptedAnswer":{"@type":"Answer","text":"The diff engine keeps an O(n×m) table in memory, so it's built for snippet- and file-sized comparisons rather than whole large codebases — a few hundred lines is comfortable. Pasting two multi-thousand-line files still works, but gets noticeably slower since both memory and compute scale with the product of the two lengths."}}]}

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