Snap Pixel

Overview

Snap Pixel is Snapchat's conversion tracking and audience management tool for advertisers running campaigns on the Snapchat platform. Operated by Snap Inc. (headquartered in Santa Monica, California), the pixel fires on advertiser websites when visitors complete actions such as purchases, sign-ups, or page views — attributing those conversions to Snapchat ad exposures. The data feeds Snap Ads Manager for campaign optimization, return on ad spend (ROAS) reporting, and powers Snap Audience Match for retargeting people who previously visited the advertiser's site.

What This Script Does

Script Files and Domains

The Snap Pixel base code loads https://sc-static.net/scevent.min.js — Snap's universal pixel script. Some implementations load from tr.snapchat.com. Event data is transmitted to tr.snapchat.com/p via HTTPS POST requests. The pixel is initialized with a Snap Pixel ID (formatted as a UUID).

Cookies Set

• _scid — Snap's primary cross-site visitor identifier. Persistent, 13-month expiry. Set as a first-party cookie on the advertiser's domain (when using first-party cookie mode) or as a third-party cookie on sc-static.net. Used for attribution and audience matching.
• _scid_r — A redundant copy of _scid used for cross-domain reconciliation. Persistent, 13-month expiry.
• _sctr — Session token for within-session event deduplication.

Standard Events Captured

Snap Pixel supports these standard event types: PAGE_VIEW (fires on all pages automatically), VIEW_CONTENT (product pages), ADD_CART (add to cart), START_CHECKOUT, ADD_BILLING, PURCHASE (with price, currency, and item identifiers), SIGN_UP, SAVE, SEARCH, SUBSCRIBE, AD_CLICK, AD_VIEW, COMPLETE_TUTORIAL, INVITE, LOGIN, SHARE, SPEND_CREDITS. Purchase events transmit transaction value, currency code, item IDs, and optional client deduplication IDs.

Snap Audience Match

The pixel feeds Custom Audiences built from site visitors, enabling retargeting campaigns to reach previous site visitors with Snap ads. Lookalike Audiences are generated by Snap's algorithm from Custom Audience behavioral patterns.

Advanced Matching (Snap Pixel Enhanced)

When enabled, the pixel can transmit hashed (SHA-256) user data including email address and phone number. Snap performs server-side matching against its user graph to improve attribution accuracy across devices and browsers where cookies are unavailable.

Conversions API (Server-Side)

Snap offers a server-side Conversions API that complements the browser pixel, allowing event data to be sent directly from the advertiser's server to tr.snapchat.com/v2/conversion — closing attribution gaps from ad blockers and Safari's ITP cookie restrictions.

Consent & Compliance

Category: Marketing

Under GDPR, the Snap Pixel requires explicit prior consent. It sets persistent cookies, builds behavioral advertising profiles, and transmits personal data to Snap's US-based servers. Snap participates in IAB TCF 2.2 as a registered vendor (Vendor ID 27). Relevant TCF purposes exercised include Purpose 1 (Store/access information on device), Purpose 3 (Create personalised ads profile), Purpose 4 (Select personalised ads), and Purpose 7 (Measure ad performance).

Snap Inc. is registered under the EU-US Data Privacy Framework (DPF) for GDPR-compliant transatlantic data transfers. The UK ICO has issued guidance that advertising pixels like Snap's require PECR-compliant consent (active opt-in) before cookies are set.

Under CCPA/CPRA, sharing website visitor data with Snap for cross-context behavioral advertising constitutes "sharing" of personal information. The opt-out mechanism must suppress the pixel for California residents who exercise their rights.

ePrivacy: The _scid and _scid_r cookies are persistent advertising identifiers — not strictly necessary — and require prior consent.

Should You Block This Without Consent?

Yes. The Snap Pixel sets persistent tracking cookies, transmits behavioral data to Snap's advertising infrastructure, and builds audience profiles for ad targeting and campaign optimization. It provides no functionality for site visitors. Block until explicit marketing consent is obtained.