Geo Tier Builder — Country Tiers & GEO Lists

Build tiered country lists and GEO allow/block segments for ad targeting, TDS rules, Cloudflare WAF, and traffic management.

Geo Tier Builder helps webmasters, media buyers, and traffic managers build tiered country lists and geo allow/block segments — fast, offline, and private. USE CASES - Build geo rules for a traffic distribution system (TDS) - Create country-based filter expressions for Cloudflare firewall rules and Workers - Generate a geo map for nginx or a country check for your JavaScript code - Prepare country segments for ad campaigns and affiliate offers - Clean up inconsistent country lists received from partners or found in old configs - Check what Google really shows in a target country (SERP preview) FEATURES - 249 countries with flags, grouped into 8 world regions - Built-in tier classification (T1, T2, T3) that you can override with your own tiers - Filter by region, by tier, or by group such as the EU or the G20 - Allow or Block mode for every list - Favorites and instant search - Select a whole region with one checkbox - 10 export templates, from a plain comma-separated list to ready-to-paste firewall expressions and code snippets - Smart import that recognizes two- and three-letter country codes, country names, and mixed separators - Save your segments as presets and reuse them later - Resizable output drawer with one-click copy or download - Path-regex helper for building and testing URL patterns in TDS rules - SERP preview: open Google results as seen from any country and language - Dark, light, and system theme PRIVACY - Zero network requests by default — everything runs offline; the only exception is the optional publisher news you turn on yourself - No telemetry, analytics, or tracking - No remote code, no CDN dependencies - All data stays in local browser storage - Open source: https://github.com/investblog/geo-tier-builder - Required permissions: storage and side panel. Optional and off by default: notifications, alarms, and access to 301.sh — used only by the news opt-in