Tenger Plugin: line-numbers
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Sticky Copy Button for Code Blocks
Adds a floating "Copy" button to every code block, with extensive styling options, optional line numbers, max-height control, and custom CSS support.
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Vaaky Highlighter — Syntax Highlighter, Code Blocks, Line Numbers for Gutenberg
Lightweight syntax highlighter with code blocks, line numbers, copy-to-clipboard, and 35+ themes. A fast, free alternative to Prism for WordPress.