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StyleVault - Page Themes & Custom CSS 🎨

Beautify web pages with preset themes, a CSS editor, and per-site memory.

A theme vault for the web. Pick a preset, write your own CSS, and StyleVault remembers the look for each site.

Tired of harsh white pages at night? StyleVault turns “theme → tweak → remember” into a one-click habit:

Preset themes

• Two free looks: Midnight Blue and Warm Sepia;
• Four Pro presets: Neon Cyber, Aurora Purple, Ocean Breeze, Rose Garden;
• Apply or remove on the current tab in one tap.

CSS editor (Pro)

• Write custom CSS and apply it live;
• Save the result as your own named theme.

Per-site memory

• Applying a theme on a site remembers it for next time;
• Auto-apply on page load (can be turned off).

Backup (Pro)

• Export custom themes as JSON;
• Import a backup to share or restore your set.

Configurable

• Language: follow system, English, or 中文;
• Auto-apply and theme sync toggles live in Settings.

Free & Pro

• Two presets and remove-current-theme are free;
• Pro is a one-time purchase that permanently unlocks all presets, the CSS editor, saved custom themes, per-site memory extras, and import / export — and supports ongoing development.

How to get started

After installing, open a webpage, click the toolbar icon, and pick a theme. Refresh already-open tabs once so the content script can run.

Please note

After installing, refresh tabs that were already open so the extension can run on those pages. Per browser rules, the extension may not work on browser internal pages (such as the New Tab page, Settings, or Downloads) or on the official store page. Open another website to test StyleVault.

Try StyleVault today — make every page yours. ✨