diff --git a/doc/manual/souce/components.md b/doc/manual/souce/components.md
index e01dbbf..83f50b3 100644
--- a/doc/manual/souce/components.md
+++ b/doc/manual/souce/components.md
@@ -30,10 +30,13 @@ Important paths:
 
 ```text
 crates/decodal-wasm/
-site/decodal-site/src/wasm/
+packages/decodal-wasm/
 ```
 
-The generated files in `site/decodal-site/src/wasm/` are committed so the site can build without requiring every consumer to run `wasm-pack` first.
+The npm package is `decodal-wasm`.
+The JSR package is `@hare/decodal-wasm`.
+
+The generated files in `packages/decodal-wasm/` are committed so the site can build without requiring every consumer to run `wasm-pack` first.
 The WebAssembly package is for execution, not syntax highlighting.
 
 ## Web editor components
diff --git a/doc/manual/souce/development.md b/doc/manual/souce/development.md
index 736fe6f..514920a 100644
--- a/doc/manual/souce/development.md
+++ b/doc/manual/souce/development.md
@@ -25,7 +25,7 @@ cargo run -q -p decodal-cli --features regex -- examples/regex/main.dcdl
 The primary crates.io package is `decodal`, which contains the embeddable library.
 `decodal-derive` provides optional derive macros for Rust struct integration and is published only when the derive crate changes.
 Workspace support crates such as `decodal-cli` and the Rust source crate `decodal-wasm` are not published to crates.io.
-The generated WebAssembly package under `site/decodal-site/src/wasm/` is published to npm and JSR.
+The generated WebAssembly package under `packages/decodal-wasm/` is published to npm and JSR.
 The project is dual licensed as `MIT OR Apache-2.0`.
 
 ```sh
@@ -72,6 +72,8 @@ site/decodal-site/src/lib/docs.js
 site/decodal-site/src/lib/highlight.js
 packages/decodal-codemirror/src/decodal.js
 packages/decodal-codemirror/src/decodal-parser.js
+packages/decodal-wasm/decodal_wasm.js
+packages/decodal-wasm/decodal_wasm_bg.wasm
 crates/decodal-wasm/src/lib.rs
 ```
 
@@ -87,7 +89,7 @@ npm run build
 `npm run build:wasm` writes generated files into:
 
 ```text
-site/decodal-site/src/wasm/
+packages/decodal-wasm/
 ```
 
 These generated files are committed so the site can be built without requiring every consumer to regenerate the wasm package first.
@@ -95,7 +97,7 @@ These generated files are committed so the site can be built without requiring e
 Publish the generated WebAssembly package from its package directory:
 
 ```sh
-cd site/decodal-site/src/wasm
+cd packages/decodal-wasm
 npm publish
 npx jsr publish
 ```
diff --git a/packages/decodal-wasm/.gitignore b/packages/decodal-wasm/.gitignore
new file mode 100644
index 0000000..da002a4
--- /dev/null
+++ b/packages/decodal-wasm/.gitignore
@@ -0,0 +1 @@
+# wasm-pack output is committed for the browser runtime package.
diff --git a/packages/decodal-wasm/README.md b/packages/decodal-wasm/README.md
new file mode 100644
index 0000000..7a33125
--- /dev/null
+++ b/packages/decodal-wasm/README.md
@@ -0,0 +1,39 @@
+# decodal-wasm
+
+WebAssembly runtime package for Decodal.
+
+This package exposes the Decodal evaluator to browsers and other JavaScript runtimes that can load WebAssembly modules.
+It is generated from the Rust crate in `crates/decodal-wasm` with `wasm-pack` and is used by the official playground.
+
+Use `decodal-codemirror` separately when you need CodeMirror 6 language support.
+
+## Install
+
+```sh
+npm install decodal-wasm
+```
+
+JSR:
+
+```sh
+deno add jsr:@hare/decodal-wasm
+```
+
+## Usage
+
+```js
+import init, { evaluateProject } from 'decodal-wasm';
+
+await init();
+
+const result = evaluateProject(JSON.stringify({
+  entry: 'main.dcdl',
+  files: {
+    'main.dcdl': 'Server = { port = Int default 8080; };',
+  },
+}));
+
+console.log(JSON.parse(result));
+```
+
+The exported functions return JSON strings so callers can handle diagnostics and successful results without depending on Rust data structures.
diff --git a/site/decodal-site/src/wasm/decodal_wasm.d.ts b/packages/decodal-wasm/decodal_wasm.d.ts
similarity index 100%
rename from site/decodal-site/src/wasm/decodal_wasm.d.ts
rename to packages/decodal-wasm/decodal_wasm.d.ts
diff --git a/site/decodal-site/src/wasm/decodal_wasm.js b/packages/decodal-wasm/decodal_wasm.js
similarity index 100%
rename from site/decodal-site/src/wasm/decodal_wasm.js
rename to packages/decodal-wasm/decodal_wasm.js
diff --git a/site/decodal-site/src/wasm/decodal_wasm_bg.wasm b/packages/decodal-wasm/decodal_wasm_bg.wasm
similarity index 100%
rename from site/decodal-site/src/wasm/decodal_wasm_bg.wasm
rename to packages/decodal-wasm/decodal_wasm_bg.wasm
diff --git a/site/decodal-site/src/wasm/decodal_wasm_bg.wasm.d.ts b/packages/decodal-wasm/decodal_wasm_bg.wasm.d.ts
similarity index 100%
rename from site/decodal-site/src/wasm/decodal_wasm_bg.wasm.d.ts
rename to packages/decodal-wasm/decodal_wasm_bg.wasm.d.ts
diff --git a/site/decodal-site/src/wasm/jsr.json b/packages/decodal-wasm/jsr.json
similarity index 100%
rename from site/decodal-site/src/wasm/jsr.json
rename to packages/decodal-wasm/jsr.json
diff --git a/site/decodal-site/src/wasm/package.json b/packages/decodal-wasm/package.json
similarity index 100%
rename from site/decodal-site/src/wasm/package.json
rename to packages/decodal-wasm/package.json
diff --git a/site/decodal-site/package-lock.json b/site/decodal-site/package-lock.json
index cd9fdc8..6abbea4 100644
--- a/site/decodal-site/package-lock.json
+++ b/site/decodal-site/package-lock.json
@@ -16,6 +16,7 @@
         "astro": "^4.16.18",
         "codemirror": "^6.0.2",
         "decodal-codemirror": "file:../../packages/decodal-codemirror",
+        "decodal-wasm": "file:../../packages/decodal-wasm",
         "marked": "^12.0.2"
       },
       "devDependencies": {
@@ -32,6 +33,10 @@
         "@lezer/lr": "^1.4.10"
       }
     },
+    "../../packages/decodal-wasm": {
+      "version": "0.1.2",
+      "license": "MIT OR Apache-2.0"
+    },
     "node_modules/@astrojs/check": {
       "version": "0.9.9",
       "resolved": "https://registry.npmjs.org/@astrojs/check/-/check-0.9.9.tgz",
@@ -3250,6 +3255,10 @@
       "resolved": "../../packages/decodal-codemirror",
       "link": true
     },
+    "node_modules/decodal-wasm": {
+      "resolved": "../../packages/decodal-wasm",
+      "link": true
+    },
     "node_modules/decode-named-character-reference": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/decode-named-character-reference/-/decode-named-character-reference-1.3.0.tgz",
diff --git a/site/decodal-site/package.json b/site/decodal-site/package.json
index 0127f54..ac74f41 100644
--- a/site/decodal-site/package.json
+++ b/site/decodal-site/package.json
@@ -7,7 +7,7 @@
     "dev": "astro dev --host 0.0.0.0",
     "build": "astro build",
     "preview": "astro preview --host 0.0.0.0",
-    "build:wasm": "wasm-pack build ../../crates/decodal-wasm --target web --out-dir ../../site/decodal-site/src/wasm --release",
+    "build:wasm": "wasm-pack build ../../crates/decodal-wasm --target web --out-dir ../../packages/decodal-wasm --release && node scripts/prepare-wasm-package.mjs",
     "deploy": "npm run build && node scripts/deploy-pages.mjs",
     "deploy:wasm": "npm run build:wasm && npm run deploy"
   },
@@ -20,6 +20,7 @@
     "astro": "^4.16.18",
     "codemirror": "^6.0.2",
     "decodal-codemirror": "file:../../packages/decodal-codemirror",
+    "decodal-wasm": "file:../../packages/decodal-wasm",
     "marked": "^12.0.2"
   },
   "devDependencies": {
diff --git a/site/decodal-site/scripts/prepare-wasm-package.mjs b/site/decodal-site/scripts/prepare-wasm-package.mjs
new file mode 100644
index 0000000..250aae1
--- /dev/null
+++ b/site/decodal-site/scripts/prepare-wasm-package.mjs
@@ -0,0 +1,53 @@
+import { writeFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+const packageDir = resolve(import.meta.dirname, '../../../packages/decodal-wasm');
+
+writeFileSync(
+  resolve(packageDir, '.gitignore'),
+  '# wasm-pack output is committed for the browser runtime package.\n',
+);
+
+writeFileSync(
+  resolve(packageDir, 'README.md'),
+  `# decodal-wasm
+
+WebAssembly runtime package for Decodal.
+
+This package exposes the Decodal evaluator to browsers and other JavaScript runtimes that can load WebAssembly modules.
+It is generated from the Rust crate in \`crates/decodal-wasm\` with \`wasm-pack\` and is used by the official playground.
+
+Use \`decodal-codemirror\` separately when you need CodeMirror 6 language support.
+
+## Install
+
+\`\`\`sh
+npm install decodal-wasm
+\`\`\`
+
+JSR:
+
+\`\`\`sh
+deno add jsr:@hare/decodal-wasm
+\`\`\`
+
+## Usage
+
+\`\`\`js
+import init, { evaluateProject } from 'decodal-wasm';
+
+await init();
+
+const result = evaluateProject(JSON.stringify({
+  entry: 'main.dcdl',
+  files: {
+    'main.dcdl': 'Server = { port = Int default 8080; };',
+  },
+}));
+
+console.log(JSON.parse(result));
+\`\`\`
+
+The exported functions return JSON strings so callers can handle diagnostics and successful results without depending on Rust data structures.
+`,
+);
diff --git a/site/decodal-site/src/scripts/playground.js b/site/decodal-site/src/scripts/playground.js
index bf9196b..40c3447 100644
--- a/site/decodal-site/src/scripts/playground.js
+++ b/site/decodal-site/src/scripts/playground.js
@@ -1,4 +1,4 @@
-import init, { evaluateProject } from '../wasm/decodal_wasm.js';
+import init, { evaluateProject } from 'decodal-wasm';
 import { EditorView, basicSetup } from 'codemirror';
 import { keymap } from '@codemirror/view';
 import { decodal } from 'decodal-codemirror';
diff --git a/site/decodal-site/src/wasm/.gitignore b/site/decodal-site/src/wasm/.gitignore
deleted file mode 100644
index 0607fb3..0000000
--- a/site/decodal-site/src/wasm/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-# wasm-pack output is committed for the playground build.
diff --git a/site/decodal-site/src/wasm/README.md b/site/decodal-site/src/wasm/README.md
deleted file mode 100644
index fc36662..0000000
--- a/site/decodal-site/src/wasm/README.md
+++ /dev/null
@@ -1,82 +0,0 @@
-# Decodal
-
-Decodal is a small deterministic DSL for describing, composing, validating, and materializing structured data.
-
-It is designed around a lightweight Rust library:
-
-- host-supplied imports through `SourceLoader`
-- no filesystem access in the library core
-- concrete and abstract values with constraints and defaults
-- deterministic expression evaluation
-- optional regex support behind a Cargo feature
-- browser playground support through WebAssembly
-
-## Library crate
-
-Embedded hosts should depend on `decodal` and provide imports with a `SourceLoader`.
-
-```toml
-[dependencies]
-decodal = "0.1"
-```
-
-## Derive support
-
-For embedded Rust applications, Decodal can generate a schema and typed decoder from a Rust struct with the `derive` feature.
-
-```toml
-[dependencies]
-decodal = { version = "0.1", features = ["derive"] }
-```
-
-```rust
-use decodal::{Decodal, DecodalDecode, DecodalSchema, Engine};
-
-#[derive(Decodal)]
-struct Service {
-    name: String,
-    #[decodal(gt = 443, default = 8443)]
-    port: i64,
-    #[decodal(rename = "feature.enable", default = true)]
-    feature_enabled: bool,
-}
-```
-
-The derive implements:
-
-- `DecodalSchema`, which produces a host schema for `Engine::bind_global`
-- `DecodalDecode`, which converts materialized `Data` into the Rust struct
-
-## CLI
-
-A standalone CLI is kept in this repository as the `decodal-cli` workspace package.
-It builds a `decodal` binary, but it is not the primary crates.io package.
-
-Run a Decodal file from the repository:
-
-```sh
-cargo run -q -p decodal-cli -- examples/advanced/main.dcdl
-```
-
-Enable optional regex support when needed:
-
-```sh
-cargo run -q -p decodal-cli --features regex -- examples/regex/main.dcdl
-```
-
-## Web playground
-
-The static documentation site and browser playground live under:
-
-```text
-site/decodal-site/
-```
-
-## License
-
-Licensed under either of:
-
-- Apache License, Version 2.0
-- MIT license
-
-at your option.