Test emails earlier in the build process with fast screenshot previews from local files, preview environments, and supported email builders.
The 'Preflight Screenshots' browser extension helps teams review screenshot output while an email is still under active development. Capture local HTML, preview pages, and draft emails from popular platforms before moving into a full audit in Preflight.
Use the extension when you want screenshot feedback earlier in the process. Move into a full Preflight audit when the email is ready for deeper accessibility, rendering, and delivery checks.
Choose the method that matches your workflow. Each preview sends the current HTML render to Preflight so your team can review screenshots before the email is ready for a full audit.
Use this method when your email is still being built locally. Open the HTML file directly in Chrome or serve it from a local development server, then simply trigger the extension.
file:// or a local URL such as localhost. To capture screenshots from Beefree, open the 'Preview' view for an email.
Run a screenshot test from a Brevo email preview while the template is still being edited.
Test message previews in Customer.io before the campaign, broadcast, or journey email is ready for a full audit. Open the 'Preview' tab for an email to enable screenshots.
Capture screenshots from Klaviyo anywhere the HTML preview is visible on the page.
You can preview templates within Resend. From a template, select the "More actions" button in the top navigation, and select "View details".
The extension will detect the HTML Preview and enable screenshot capture.
See real screenshots, review accessibility findings, and check delivery signals in one place.
Try Preflight free for 14 daysNo charge today. Cancel anytime before your trial ends.