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avatarsniff
Sniff out generic default avatars, straight from the pixels.
Hey Product Hunt,
avatarsniff solves a small, specific annoyance. When someone never sets a profile picture, their provider hands you a generated default: a letter on a coloured square, a flat colour block, the Gravatar silhouette, a GitHub identicon. To you it's just an image URL, indistinguishable from a real photo, so you end up showing the boring placeholder.
avatarsniff reads the image and tells you it's a default, and which kind, so you can swap in your own avatar instead.
What makes it hold up over time: the detection is structural, not colour-matching. It keys on shape (a flat saturated background, a near-white glyph, mirror symmetry) so it keeps working when providers add new colours.
A few specifics:
- Zero install dependencies. PNG/GIF/JPEG decode in the core; WEBP and SVG are opt-in so their wasm only loads if you need it.
- Same API in the browser, Node, Deno, Bun, edge and workers. No framework.
- One function. Pass it bytes, a URL, or canvas ImageData.
There's a live demo where you can paste any avatar URL and watch it get classified: https://avatarsniff.tunc.co
It's free and MIT-licensed: https://github.com/tunctn/avatar...
Would love to hear where it trips up on your data.
Thank you!
About avatarsniff on Product Hunt
“Sniff out generic default avatars, straight from the pixels.”
avatarsniff was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #81 on the daily leaderboard. Detect generic/default provider avatars (Google's initial-on-colour, Gravatar mystery-person, solid placeholders) straight from image pixels. Framework-agnostic, zero-dependency core.
On the analytics side, avatarsniff competes within Open Source, User Experience, Developer Tools and GitHub — topics that collectively have 992k followers on Product Hunt. The dashboard above tracks how avatarsniff performed against the three products that launched closest to it on the same day.
Who hunted avatarsniff?
avatarsniff was hunted by tunç türkmen. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of avatarsniff including community comment highlights and product details, visit the product overview.
tunç türkmen