Halcyon

A calm window on the open web.

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Explore

Your favorite corners of the web, one tap away.

Settings

Everything lives in your browser — nothing is sent anywhere.

Search engine

Block ads & trackers Drops requests to known ad & analytics domains before they leave the tunnel.

Block AI content farms Blocks known AI "slop" content-farm sites. Opinionated — turn off if it ever hides a site you wanted.

Hide Discord upsells Hides Discord's Nitro/boost upsells, store & gift buttons and promo banners. Cosmetic only.

Block pop-ups Stops pop-ups, pop-unders and tab-redirect ads (window.open not tied to a click). Popups you actually click — logins, "open in new tab" — still work.

Clean tracking links Strips tracking params (utm_*, fbclid, gclid…) from links you open. Loads the clean URL and shows it clean in the address bar.

Wisp server Leave blank to use this site's own server.

Tab cloak Disguise this tab's title & icon so it blends into a row of school tabs. Pick a preset, or set your own below. Blank = Halcyon.

Open in about:blank Relaunch this site inside an about:blank shell.

Panic key Press Esc twice to jump here instantly.

Session & privacy Traffic is end-to-end encrypted — the server relays your requests but can't read the contents of HTTPS sites. Logins live only in this browser. Wiping signs you out of every proxied site and clears all traces from this device.

Credits & open source › Halcyon is built on these open-source projects.

Scramjet, libcurl & wisp — the proxy engine (MercuryWorkshop)
HaGeZi, OISD, FMHY & durablenapkin — ad, tracker & scam blocklists
anudeepND whitelist — breakage allowlist
alvi-se AI uBlock blacklist — AI content-farm list
Disblock-Origin — Discord upsell hiding
DandelionSprout's LegitimateURLShortener — tracking-link cleaning
BehindTheOverlay — overlay remover

History

Where you've been — stored only in this browser, never sent anywhere.

Weaving the connection…