CSP for Zeplin Embeds: Copy-Paste Reference
If you embed Zeplin content and your CSP is even slightly too strict, the embed breaks in annoying ways: blank iframe, blocked scripts, missing fonts, or silent failures that only show up in DevTools. I’ve had to debug enough third-party embeds to know the pattern: start narrow, inspect what gets blocked, then add only what the embed actually needs. Don’t cargo-cult a giant allowlist. This guide is a practical reference for getting Zeplin embeds working with CSP, with copy-paste examples you can use as a starting point. ...