The LinkedIn newsletter header is the visual that sits at the top of every issue and inside every reshare. LinkedIn shows it in the feed, in notifications, and in the newsletter landing page. The recommended size is 744 by 400, a smaller, denser canvas than a typical OG image, so squeezing in the issue number, the theme, and the brand mark requires careful layout. Most newsletter operators end up with one or two beautiful headers and a long tail of issues that reused the same header because nobody had time to redesign for issue 14.

SleekPixel turns the header into a render of the issue post. The template is 744 by 400 in HTML and CSS, with slots for the issue number, the theme line, the date, and any author or guest field. Each issue saves with a fresh header that surfaces what is actually inside, instead of a generic series logo. The brand fonts and colors come from the theme, not from a Canva approximation, so refreshes propagate by re-rendering issues in batch.

LinkedIn does not allow third-party uploads to the newsletter header, so SleekPixel exposes a download button in the WordPress editor sidebar. The PNG is in uploads, named after the issue, and ready to drop into the LinkedIn newsletter editor.

LinkedIn newsletters compete for attention against a noisy feed, and the header is the first signal a reader uses to decide whether this issue is worth opening. A header that has visibly nothing to do with this week's issue (because it is the same image on every issue) trains readers to skim past the entry. A header that surfaces issue 14 with this week's theme and guest tells the reader the issue is fresh and gets the open.

Doing this manually does not survive a publishing cadence past a handful of issues, so most newsletter operators settle for a static header and lose engagement to it. SleekPixel makes the header a function of the issue post. Every issue saves with a fresh header.

Guest features surface the guest. Seasonal arcs share an accent. The publication identity carries from issue 1 to issue 50 because every header rendered from the same template, and the issue-specific information rendered from the issue post.