Introducing Diff Checker — Compare Code & Text, Line by Line

“What changed between these two versions?” is the question behind every code review, config comparison, and document edit — and eyeballing two blocks of text is slow and error-prone. The new Diff Checker answers it precisely, with colour-coded side-by-side panels and a similarity score.

What it does

• Three diff levels: compare by line, word, or character.
• Side-by-side view: original on the left, new on the right, row-aligned with line numbers.
• Colour-coded: additions in green, removals in red, unchanged left plain.
• Noise filters: Ignore Whitespace and Ignore Case strip cosmetic churn.
• Live stats: added, removed, and unchanged counts plus a similarity percentage.
• Client-side: paste or upload a file — nothing leaves your browser.

Why it matters

A precise diff is the core of reviewing changes with confidence. Line mode keeps code review focused, word mode isolates the exact phrase that changed in prose, and character mode catches the single-character bugs that hide in plain sight. Ignoring whitespace can shrink a reformatted 300-line diff down to the handful of lines that actually changed behaviour.

Learn more

Read How a Diff Checker Works: LCS, Hunks, and Diff Levels, then open the Diff Checker and compare your own files.