Does SendGrid include a built-in CSS inliner?

SendGrid provides basic functionality but lacks granular control. SendGrid's Marketing Campaigns inline CSS automatically. Transactional emails sent via API require pre-inlining.

Is there a free way to CSS inlining for SendGrid campaigns?

Yes. The MiN8T CSS Inliner below runs entirely in your browser — no signup, no upload, and the output works with any SendGrid workflow.

What image size limit does SendGrid enforce?

SendGrid accepts uploads up to 2000 KB per image and recommends a max width of 600px for email body width. Supported formats: JPG, PNG, GIF, WebP.

Works with SendGrid

CSS Inliner for SendGrid: Free Browser-Based Tool

→ Open the free CSS Inliner

Browser-only, no signup, no upload. Output works with any SendGrid campaign.

Built by the MiN8T Engineering Team · Updated 28 May 2026

SendGrid's built-in tools cover the basics, but the CSS inliner workflow often benefits from a dedicated, browser-only preprocessor before uploading. Outlook desktop (Word rendering engine) ignores