ActivityPub logo PNG

Published as an official World Wide Web Consortium (W3C) Recommendation on January 23, 2018, by the W3C Social Web Working Group — co-authored by Christine Lemmer-Webber, Jessica Tallon, and Evan Prodromou — ActivityPub represents the open architectural foundation of the decentralized social web, commonly known as the Fediverse. Built as a standardized decentralized social networking protocol, ActivityPub provides a client-to-server API for creating, updating, and deleting content, alongside a federated server-to-server API for cross-server message routing, social notifications, and content syndication. By breaking the walled gardens of centralized social media platforms, ActivityPub allows independent platforms to interoperate seamlessly: a user on Mastodon (microblogging) can follow, like, and comment on creators hosting videos on PeerTube, sharing photos on Pixelfed, reading links on Lemmy, or broadcasting posts from Meta's Threads. The ActivityPub logo is a radiant, modern circular emblem featuring concentric expanding broadcast rings and interconnected communication nodes radiating from a central hub. This cosmic, network-inspired glyph visually symbolizes decentralized federation, open web interoperability, and user-owned social communication. An ActivityPub logo png download delivers this celebrated open web standard mark.

The signature brand color of ActivityPub is electric magenta pink, designated by hex code #F1007E (RGB: 241, 0, 126). This vibrant, neon-infused magenta conveys digital vibrancy, democratic open-web passion, revolutionary internet independence, and decentralized community connection. The vector assets on this page are clean, single-color flat Simple Icons redraws of the official ActivityPub broadcast glyph. Built without gradient overlays or pseudo-3D bevels, this flat geometric asset renders with razor-sharp fidelity across open-source project directories, Fediverse server landing pages, protocol documentation, and tech conference presentations.

Differentiating ActivityPub from individual client apps and proprietary platforms is essential for understanding modern social protocols. While platforms like Mastodon, Pixelfed, and Lemmy are user-facing applications, ActivityPub is the underlying W3C networking protocol (analogous to how HTTP powers the web or SMTP powers email). It is also distinct from competing decentralized protocols like Bluesky's AT Protocol (Authenticated Transfer Protocol) or Nostr. Searches for "activitypub logo png," "activitypub icon svg," "fediverse logo," "activitypub transparent logo," and "activitypub vector" specifically point to this W3C decentralized protocol standard.

Every graphic export on this page incorporates an alpha transparent background. An ActivityPub logo transparent download ensures seamless, friction-free integration onto Fediverse instance homepages, developer documentation portals, open-web advocacy blogs, and dark-mode software interfaces without an awkward white bounding box. We supply five standardized PNG resolutions: 64px and 128px for server badges and social link footers, 256px and 512px for article thumbnails and protocol architecture diagrams, and 1024px for tech conference keynote slides and high-resolution print posters. The ActivityPub logo svg download provides infinite vector mathematical precision, perfect for responsive web design, network topology diagrams, and digital graphics.

Alongside the signature magenta pink (#F1007E) asset, this page provides pre-rendered solid black (#000000) and pure white (#FFFFFF) versions. The white ActivityPub emblem is an essential asset for dark-mode developer portals, terminal interfaces, and midnight Fediverse instance themes, delivering striking optical contrast against dark backdrops. The typography associated with ActivityPub is a clean, contemporary geometric sans-serif that reinforces the protocol's accessible, open-standard ethos.

When featuring the ActivityPub logo in open-web documentation, Fediverse instance footers, or protocol tutorials, observe proper open-standard attribution practices. The digital vector files on this website are distributed under the Creative Commons CC0 license via Simple Icons, granting free personal and commercial downloads without required attribution. ActivityPub is a published W3C Recommendation. Utilizing this emblem to denote protocol compatibility, indicate federation support, or illustrate decentralized social networking tutorials represents standard nominative fair use, provided you do not suggest exclusive official W3C certification or proprietary ownership. Review our usage guidelines page for additional details.