SleekPixel for Nostr note images
Nostr clients increasingly render link previews from og:image when a URL appears in a note. SleekPixel produces those previews from your WordPress posts so links shared across relays carry a real card.
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Nostr clients render link previews from og:image
Nostr is a relay-based protocol where notes are signed by a user's keypair and broadcast to relays of their choosing. Clients differ in what they render, but most modern Nostr clients pull link previews from URLs the same way other social platforms do: fetch the page, parse og:image, show a card under the note.
Long-form Nostr notes (kind 30023) often link out to the original article hosted on a WordPress site, and those external links benefit from a proper preview just like a Bluesky or Mastodon link would. Without og:image, the link arrives in the relay feed as a bare URL.
SleekPixel renders the per-post 1200x630 PNG into og:image, and Nostr clients that follow the link-preview convention show the card alongside the note. The image lives in the WordPress uploads directory, the URL is stable across relays, and the preview travels wherever the note federates.
Workflow
From WordPress post to Nostr link preview
Design the 1200x630 template
Apply to post types
Save the post
Mention the URL in a Nostr note
Output
What a Nostr client renders for a linked WordPress note
A 1200x630 PNG that Nostr clients fetch via og:image when the WordPress URL is mentioned in a note.
Comparison
Bare URL vs SleekPixel for Nostr
Bare URL with no preview
- URLs without og:image render as plain text in most Nostr clients
- Sites without per-post images show the same logo on every note
- No cross-relay visual identity for the source site
- Long-form kind 30023 notes lose recognition without a thumbnail
- Manual image uploads on every note break when relays mirror without media
SleekPixel
- Per-post 1200x630 PNG written into og:image on every save
- Standard Open Graph spec works with every Nostr client that follows the link-preview convention
- Title, author, and accent bind to the WordPress post
- Image hosted on WordPress, not on a relay - URL stays stable
- Template change refreshes the catalog so relay-cached previews catch up
Features
What SleekPixel gives you for Nostr note images
Identity-stable image URL
The PNG lives at a permanent WordPress URL. Nostr clients fetch it when the link is mentioned in a note, and the URL does not change with key rotations or relay choices.
Standard og:image
Nostr clients that render link previews use the same Open Graph spec as Twitter and Mastodon. One render covers all of them.
Long-form ready
Kind 30023 long-form notes often link to the canonical WordPress article. The preview gives the note a visual anchor on relays that respect og:image.
Use cases
Who shares WordPress posts on Nostr
Long-form publishers
Writers publishing kind 30023 notes link back to the WordPress canonical. The og:image renders in client previews across relays.
Bitcoin and zap-friendly authors
Authors who accept zaps tie a WordPress identity to a Nostr pubkey. Per-post previews keep the brand consistent across both surfaces.
Protocol-aligned tech blogs
Open protocols, self-hosted relays, decentralized identity blogs share to Nostr communities with previews intact.
The bigger picture
Why Nostr previews matter for protocol-native audiences
Nostr's audience overlaps heavily with people who pay attention to open protocols and clean metadata. A WordPress site that ships proper og:image signals that the author treats the open web seriously, which on Nostr translates to visibility in relays that curate content from the protocol-fluent corner of the internet. A note mentioning a WordPress URL with a missing preview lands as a bare link, and on a feed where notes are signed and zaps are routed by pubkey, the visual cue carried by the preview is the first cross-protocol bridge to a reader who has never seen the site.
Tying the image to the WordPress post that already exists collapses the cost of doing this well to nothing. The render runs on save, the og:image is in the head, and every Nostr client that follows the link-preview convention picks it up automatically. The same image works for Bluesky, Mastodon, Threads, and every aggregator the open web has shipped in the last two decades.
Long-form Nostr authors get back the time they used to spend exporting per-platform images, and the brand identity stays consistent across every relay the note touches.
Questions
Common questions about SleekPixel for Nostr note images
Not all of them. Clients that focus on raw note streams may show URLs as text. The widely used clients increasingly fetch og:image to render link previews under notes; coverage is growing rather than universal.
No. SleekPixel writes meta tags on the WordPress page. Publishing a note that references the URL is up to the author's Nostr client of choice.
In the WordPress uploads directory, served from the same domain as the post. Nostr clients fetch the image over standard HTTP when they parse the og:image tag.
Nostr relays carry signed note events, not arbitrary image binaries. Image fetching happens client-side from the original WordPress URL, so the image stays under your control.
Yes. NIP-23 (kind 30023) long-form notes often reference a canonical URL on a WordPress site. The og:image on that URL is what Nostr clients fetch when rendering the link preview.
Some privacy-focused clients block third-party image fetches by default. Users on those clients see the link without a preview; users on the default-image-fetching clients see the card. The og:image still lives on the WordPress page either way.
Yes, as text rendered into the template. SleekPixel renders whatever fields you bind, including a small Lightning address line or a zap badge if you want to signal that the post supports zaps.
Yes. Open Graph is shared between Bluesky, Mastodon, Threads, Lemmy, kbin, and Nostr's link-preview-capable clients. A single SleekPixel render covers the entire federated and protocol-native web.
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