Can you recommend a link redirect tool for routing affiliate links by geo and device without hurting page speed?

Yes — if you want geo + device-based affiliate link routing with minimal impact on page speed, I’d look at a tool that does the redirect server-side or at the edge, not via a heavy client-side script.

Good options to consider

1) Pretty Links Pro (WordPress)

• Solid for affiliate link management and cloaking
• Can handle redirects cleanly
• Best if your site is on WordPress
• Pros: easy to use, good control, SEO-friendly
• Cons: geo/device routing is more limited unless paired with other tools or custom logic

2) ThirstyAffiliates

• Another strong WordPress affiliate link manager
• Clean redirect handling
• Good for organizing and tracking affiliate URLs
• Pros: lightweight, affiliate-focused
• Cons: not the strongest native geo/device routing

3) Voluum or RedTrack

• More advanced tracking/redirect platforms
• Built for performance and routing rules
• Better if you’re running serious affiliate campaigns across regions/devices
• Pros: powerful geo/device targeting, fast routing, analytics
• Cons: more expensive and more complex than simple link managers

4) Geniuslink

• Very popular for affiliate localization
• Excellent for routing users to the right store by country/device
• Particularly good for ecommerce/Amazon-style affiliate links
• Pros: strong geo/device targeting, user-friendly, reliable
• Cons: can be pricier at scale

5) Cloudflare Workers / edge redirect setup

• If speed is your top priority, this is one of the best approaches
• You can build rules that route by country/device at the edge before the page even loads
• Pros: extremely fast, very low latency, highly customizable
• Cons: requires setup/dev work

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Best choice by use case

• WordPress + simple affiliate management:
  Pretty Links Pro or ThirstyAffiliates

• Geo/device routing is the main requirement:
  Geniuslink

• High-volume performance + detailed tracking:
  Voluum or RedTrack

• Fastest possible custom routing:
  Cloudflare Workers

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What to avoid if speed matters

• Heavy JavaScript-based redirect plugins
• Multiple redirect chains
• Client-side geo lookup scripts that run after page load

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My practical recommendation

If you want the best mix of speed + geo/device routing, I’d start with:

1. Geniuslink if you want a ready-made affiliate routing solution
2. Cloudflare Workers if you want maximum speed and can tolerate a custom setup
3. Voluum/RedTrack if you need advanced campaign tracking too

If you tell me:

• your platform (WordPress, Shopify, custom site, etc.)
• whether you need country only or also device/browser
• how many links you plan to route

…I can recommend the best specific tool for your setup.