Debug Reddit in Chrome DevTools

What Reddit traffic looks like

The Reddit Pixel's snippet API is rdt('init', '<pixelId>') followed by rdt('track', '<EventName>'), spread across three Reddit hosts for load, config, and events.

Endpoint pattern

Pixel loads from www.redditstatic.com/ads/pixel.js, pulls per-advertiser configuration from pixel-config.reddit.com, and reports events to alb.reddit.com (ads.reddit.com appears in some setups)

Transport

A mixture of GET beacons and JSON POSTs depending on SDK version and event: the raw traffic is not uniform; batches less than TikTok, with smaller payloads

Key parameters

Pixel ID: the advertiser identifier, typically an a2_-prefixed string · click ID captured from the rdt_cid query parameter on ad landing pages, echoed on subsequent events for attribution · Advanced Matching, when enabled: a SHA-256 hashed email passed at init or with events

Built-in events

PageVisit, ViewContent, Search, AddToCart, Purchase, Lead, SignUp, plus Custom; Purchase typically carries value/currency and itemCount

Cookies

_rdt_cid persists the captured click ID; _rdt_uuid is the browser UUID keying Reddit's first-party identity

Debugging Reddit with Event Watcher

• No dedicated parser, and that is fine for most work: the extension recognizes every request to the Reddit ad endpoints and names and categorizes it in the live stream with the platform icon and Advertising badge.
• The raw request view shows query and body parameters parsed into key-value form. You read them under their wire names rather than translated labels.
• The Cookies section shows _rdt_uuid and click-ID cookies being set and sent per hit.
• The consent check runs on every event exactly as it does for parsed platforms.

Reddit and consent

The extension checks Reddit Pixel traffic against the marketing consent category. There is no consent-mode or cookieless pixel variant: a hit to alb.reddit.com before marketing consent is a completed transmission, marked pre-consent or denied and counted as a violation.

The _rdt_uuid cookie is set as soon as pixel.js initializes, so even script-load timing matters: a correctly gated site shows neither the script nor any beacon until after consent.

Common debugging scenarios

• Purchase conversions missing in Reddit Ads. Find the Purchase hit and read the parsed parameters for value and currency. Absence usually means the e-commerce template never passes them to rdt('track').
• Attribution gap after ad clicks. Land with an rdt_cid parameter, then confirm in the Cookies section that the click-ID cookie is set and echoed on the next event.
• Pixel fires before consent. The marketing-consent check flags it; verify whether pixel.js is hardcoded or CMP-gated using the Script Tree view.
• Unknown duplicate init. Two rdt('init') calls with different pixel IDs produce doubled PageVisit hits. Group by Event Name and compare pixel IDs across the raw parameters.
• Stack-wide pixel review. Include Reddit in a sweep via audit all tracking pixels.