replyt.
Free Tool

UTM Builder for Reddit & HN

Build properly formatted UTM parameters for your Reddit and Hacker News community links. Because Reddit referrers are unreliable — UTMs are the only way to know what's actually converting.

Spaces auto-converted to underscores
Use for A/B testing different reply styles
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Example UTMs for Reddit & HN

Copy these patterns as starting points for the most common community marketing scenarios.

Scenarioutm_sourceutm_mediumutm_campaign
r/startups thread replyredditcommunitystartups
HN Ask HN commenthackernewscommunityaskhn
Show HN submissionhackernewscommunityshowhn
r/SaaS reply — product mentionredditcommunitysaas

Why UTMs matter for Reddit traffic

Reddit strips referrer information when linking to external sites with HTTPS. This means Google Analytics and most analytics tools show Reddit traffic as "direct" — making it invisible to attribution. UTM parameters are embedded in the URL itself, so they survive Reddit's referrer policy and let you see exactly which threads, subreddits, and reply styles are driving signups.

Use utm_content to A/B test different reply styles in the same subreddit. For example: utm_content=helpful-reply vs utm_content=question-reply — after 20 replies you will see which style converts better.

Recommended naming conventions

Keep everything lowercase and use hyphens or underscores instead of spaces. Consistency matters — Reddit and reddit appear as two separate sources in GA4. Settle on a convention before you start and stick to it.

Monitor every subreddit. Reply faster. Track what converts.

Replyt watches your target subreddits in real time, scores threads for buyer intent, and generates ready-to-post replies with your UTMs baked in.

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