Developer & Content Utilities
Text & Code Diff Checker
Compare two text documents or code files side-by-side with visual addition/deletion highlights and line-by-line inspection.
6 additions6 deletions3 unchanged
Original Text295 chars
Modified Text365 chars
Visual Diff InspectionSide-by-Side
1 function calculateMetrics(pageData) {
2- // Legacy metrics calculator
2+ // Modern Core Web Vitals calculator
3- const lcp = pageData.largestContentfulPaint || 0;
3+ const lcp = pageData.largestContentfulPaint ?? 0;
4- const cls = pageData.cumulativeLayoutShift || 0;
4+ const cls = pageData.cumulativeLayoutShift ?? 0;
5- const fid = pageData.firstInputDelay || 0;
5+ const inp = pageData.interactionToNextPaint ?? 0; // Upgraded from FID to INP
6
7- console.log("Performance score calculated.");
7+ console.log("Core Web Vitals assessed successfully.");
8- return { lcp, cls, fid };
8+ return { lcp, cls, inp, status: "passed" };
9 }
About this tool
Comprehensive documentation & audit utility guideDiff checkers compare two strings, text files, or source code snippets to pinpoint exact additions, deletions, and structural alterations. This tool executes 100% locally in your browser, enabling safe inspection of private contracts, code diffs, and configuration changes without server logging.
How it works
1
Paste Both Versions
Paste your baseline original text on the left and the modified updated version on the right.
2
Choose Diff View
Toggle between side-by-side dual columns and unified line-by-line inspection.
3
Analyze Additions & Deletions
Review colored green additions and red deletions, ignore whitespace if desired, and copy the unified diff.
What it checks
Myers-style line-by-line difference detection
Addition (+) and Deletion (-) visual color highlighting
Whitespace ignore toggle for formatting-agnostic comparisons
Line numbers gutter and difference summary metrics
Unified standard diff output export