Medium Code Enhancer

Syntax highlighting, expand modal, and copy for Medium code blocks.

Medium Code Enhancer transforms the plain, unstyled code blocks on Medium articles into fully-featured, readable panels — automatically, as you browse. FEATURES • Syntax highlighting — 20 languages auto-detected via Highlight.js (JavaScript, TypeScript, Python, Bash, SQL, Go, Rust, Java, C++, CSS, HTML, JSON, YAML, Dockerfile, Ruby, PHP, Swift, Kotlin, and more) • Expand to modal — open any code block in a distraction-free full-screen overlay • Language selector — override auto-detection with a single click • Copy to clipboard — one click copies raw code with no line numbers or formatting artifacts • Line numbers — toggle per block; auto-enabled for blocks with 6 or more lines • Theme switcher — Auto (follows your OS), Light, or Dark • ON / OFF toggle — disable the extension on any tab instantly, without reloading the page • Viewport-first rendering — in-view blocks are highlighted immediately; off-screen blocks are deferred so long articles never cause jank • MutationObserver — catches code blocks injected after the initial page load PRIVACY No data ever leaves your browser. All processing happens locally. The only thing stored is your three UI preferences (theme, line numbers, enabled state) via chrome.storage.sync. No analytics, no telemetry, no remote requests. Highlight.js is bundled with the extension — it is never loaded from a CDN. Open source — MIT licensed. https://github.com/thiago-preira/medium-code-enhancer