Line-by-line comparison with the changed words highlighted inside each edited line.

Pretty-print or minify, with the exact line and column of a syntax error.

Both directions, with type inference, NDJSON, and nested keys flattened to columns.

Twelve cases computed at once, including a Title Case that keeps punctuation.

Segmenter-accurate counts plus readability, keyword density, and channel limits.

Keep the unique lines, the repeated ones, or the one-offs — with occurrence counts.

Emails, URLs, numbers, and your own regex — with capture groups and match context.

UTF-8 correct in both directions, with URL-safe output, line wrapping, and a hex view.

Component, whole-URL, and form rules side by side, with double-encoding detection.

Seeded filler text — the same link reproduces the same copy — as text, HTML, or JSON.

Grade 1 both ways, with correct number runs, capital signs, and dot-grid cells.