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1 files changed, 54 insertions, 0 deletions

diff --git a/docs/guides/util/hash-a-password.md b/docs/guides/util/hash-a-password.md
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+---
+name: Hash a password
+---
+
+The `Bun.password.hash()` function provides a fast, built-in mechanism for securely hashing passwords in Bun. No third-party dependencies are required.
+
+```ts
+const password = "super-secure-pa$$word";
+
+const hash = await Bun.password.hash(password);
+// => $argon2id$v=19$m=65536,t=2,p=1$tFq+9AVr1bfPxQdh6E8DQRhEXg/M/SqYCNu6gVdRRNs$GzJ8PuBi+K+BVojzPfS5mjnC8OpLGtv8KJqF99eP6a4
+```
+
+---
+
+By default this uses the [Argon2id](https://en.wikipedia.org/wiki/Argon2) algorithm. Pass a second argument to `Bun.hash.password()` to use a different algorithm or configure the hashing parameters.
+
+```ts
+const password = "super-secure-pa$$word";
+
+// use argon2 (default)
+const argonHash = await Bun.password.hash(password, {
+  memoryCost: 4, // memory usage in kibibytes
+  timeCost: 3, // the number of iterations
+});
+```
+
+---
+
+Bun also implements the [bcrypt](https://en.wikipedia.org/wiki/Bcrypt) algorithm. Specify `algorithm: "bcrypt"` to use it.
+
+```ts
+// use bcrypt
+const bcryptHash = await Bun.password.hash(password, {
+  algorithm: "bcrypt",
+  cost: 4, // number between 4-31
+});
+```
+
+---
+
+To verify a password, use `Bun.password.verify()`. The algorithm and its parameters are stored in the hash itself, so there's no need to re-specify any configuration.
+
+```ts
+const password = "super-secure-pa$$word";
+const hash = await Bun.password.hash(password);
+
+const isMatch = await Bun.password.verify(password, hash);
+// => true
+```
+
+---
+
+See [Docs > API > Hashing](/docs/api/hashing#bun-password) for complete documentation.