Help

Use hashavatar.app directly from the browser, your frontend, or your backend. Every avatar URL is deterministic, so the same identifier and options always produce the same result.

Basic URL

Use the query endpoint when you want a simple public image URL.

https://hashavatar.app/v1/[email protected]&algorithm=sha512&kind=robot&background=white&accessory=glasses&color=gold&expression=happy&shape=circle&format=webp&size=256

Path Style URL

Use the path form if you prefer cleaner embed URLs.

https://hashavatar.app/avatar/fox/[email protected]/webp

HTML Example

<img
  src="https://hashavatar.app/v1/[email protected]&algorithm=sha512&kind=monster&background=themed&accessory=horns&color=crimson&expression=grumpy&shape=hexagon&format=webp&size=256"
  alt="Generated monster avatar"
/>

JavaScript Example

const avatarUrl = new URL("https://hashavatar.app/v1/avatar");
avatarUrl.search = new URLSearchParams({
  id: user.email,
  algorithm: "sha512",
  kind: "robot",
  background: "white",
  accessory: "glasses",
  color: "gold",
  expression: "happy",
  shape: "circle",
  format: "webp",
  size: "256",
}).toString();

Supported Parameters

id: any stable identifier such as an email, username, internal user id, or one-way hash
tenant: optional namespace partition for multi-tenant apps
style_version: optional style namespace such as v2
algorithm: identity hash mode; only sha512 is supported
kind: any public hashavatar family, including cat, dog, robot, planet, rocket, frog, panda, cupcake, pizza, octopus, knight, bear, penguin, dragon, ninja, astronaut, diamond, coffee-cup, and shield
background: themed, white, black, dark, light, transparent, polka-dot, striped, checkerboard, grid, sunrise, ocean, or starry
accessory: none, glasses, hat, headphones, crown, bowtie, eyepatch, scarf, halo, or horns
color: default, neon-mint, pastel-pink, crimson, gold, or deep-sea-blue
expression: default, happy, grumpy, surprised, sleepy, winking, cool, or crying
shape: square, circle, squircle, hexagon, or octagon
format: output format; only webp is supported
size: from 64 up to 1024

Accessory and expression layers apply to character-style families. Object-style families such as planet, rocket, paws, mushroom, cactus, cupcake, pizza, icecream, diamond, coffee-cup, and shield are normalized to accessory=none and expression=default.

Signed Storage Links

If this deployment has object storage configured, request a presigned storage link from /v1/avatar/link. That endpoint stores the generated object and returns JSON with the signed URL, object key, and a hashed cache key. Standard avatar responses do not expose signed-link metadata in response headers.

GET https://hashavatar.app/v1/avatar/[email protected]&algorithm=sha512&kind=robot&background=white&accessory=glasses&color=gold&expression=happy&shape=circle&format=webp&size=256

Open Source

The public site source lives in the API repository and the reusable avatar renderer is published on crates.io. Repository · crates.io