Help & FAQ

Vesper is a browser extension that applies a calm, consistent dark theme to every website you visit. It includes five curated color modes, per-site brightness and contrast controls, and an optional automatic on/off schedule.

The core extension is free forever. Vesper Pro is an optional one-time purchase of US$8 that unlocks Reading mode and all future Pro features, no subscription, ever.

Vesper is available on the Chrome Web Store. Just open the listing and click Add to Chrome to install it in one click, no account required.

No. Vesper runs entirely on your device. It does not collect browsing history, page content, or any telemetry, and it requires no account. See our Privacy Policy for the full breakdown.

After purchasing, you'll receive a license key by email from Lemon Squeezy. Open the Vesper popup, go to Settings → Pro, paste your key, and click Activate.

Yes. Vesper Pro comes with a 14-day money-back guarantee. Email us within 14 days and we'll refund you in full. See the Refund Policy.

Open the Vesper popup and toggle Vesper off for that site, or fine-tune its brightness and contrast with the per-site controls. If a site consistently misbehaves, let us know and we'll add a fix.