LeetThemes – Themes for LeetCode

Cinematic, lofi, anime and custom themes for LeetCode, with focus mode, generative lofi audio and a pomodoro timer.

LeetThemes restyles LeetCode with 16 animated themes and adds a few tools for long practice sessions. Everything runs locally in your browser. THEMES • 16 built-in themes across Movie, Lofi, Anime, Retro, Nature, Space, Minimal and Classic — including Cinema Noir, Neon Tokyo, Sakura Dream, Cyberpunk Grid, Paper, Dracula and Nord. • Dark and light themes, with optional ambient effects: dust, rain, petals, stars, snow, fireflies, film grain and scanlines. • Pick a theme from the toolbar popup; open LeetCode tabs update immediately. • An intensity slider and a reduced-motion switch (the system "reduce motion" setting is respected too). THEME STUDIO • Build your own theme: ten colour roles, fonts, particles, grain, vignette and backgrounds. • Use a gradient, an image or short video from your computer, or an image URL. Uploaded images are resized and stored only on your device. • Live preview while you edit. Export and import theme packs as JSON. FOCUS MODE • Hide the header, promos, sidebars, discussions and footer on problem pages. Leave any time from the on-page chip or with a keyboard shortcut. LOFI AUDIO • Three generative soundscapes (Café, Rain, Night) synthesised in your browser with the Web Audio API. No streaming, no audio files. • Plays in one tab at a time and pauses when the tab is hidden (configurable). POMODORO TIMER • A floating, draggable timer with short and long breaks, auto-start and a chime. • Keeps running across reloads and stays in sync across LeetCode tabs. Desktop notifications arrive on time even when the tab is in the background. KEYBOARD SHORTCUTS Alt+Shift+L cycle theme · Alt+Shift+F focus mode · Alt+Shift+M lofi · Alt+Shift+D timer (change them at chrome://extensions/shortcuts) PRIVACY No accounts, analytics, tracking or remote code. Settings use Chrome storage (synced if you use Chrome Sync); custom themes and uploads stay on your device. The extension only runs on leetcode.com and leetcode.cn. LeetThemes is an independent project and is not affiliated with or endorsed by LeetCode.