diff --git a/package-lock.json b/package-lock.json
index df9585a..22e5e9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -51,7 +51,8 @@
         "text-encoding": "^0.7.0",
         "tokenize-words": "^0.0.4-alpha.0",
         "url-parse": "^1.5.10",
-        "url-polyfill": "^1.1.12"
+        "url-polyfill": "^1.1.12",
+        "yaml": "^2.5.1"
       },
       "devDependencies": {
         "@types/chai": "^4.3.0",
@@ -17180,6 +17181,17 @@
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
       "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     },
+    "node_modules/yaml": {
+      "version": "2.5.1",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.5.1.tgz",
+      "integrity": "sha512-bLQOjaX/ADgQ20isPJRvF0iRUHIxVhYvr53Of7wGcWlO2jvtUlH5m87DsmulFVxRpNLOnI4tB6p/oh8D7kpn9Q==",
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14"
+      }
+    },
     "node_modules/yargs": {
       "version": "17.7.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
@@ -30650,6 +30662,11 @@
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
       "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     },
+    "yaml": {
+      "version": "2.5.1",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.5.1.tgz",
+      "integrity": "sha512-bLQOjaX/ADgQ20isPJRvF0iRUHIxVhYvr53Of7wGcWlO2jvtUlH5m87DsmulFVxRpNLOnI4tB6p/oh8D7kpn9Q=="
+    },
     "yargs": {
       "version": "17.7.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
diff --git a/package.json b/package.json
index ae6f646..e69533a 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,8 @@
     "text-encoding": "^0.7.0",
     "tokenize-words": "^0.0.4-alpha.0",
     "url-parse": "^1.5.10",
-    "url-polyfill": "^1.1.12"
+    "url-polyfill": "^1.1.12",
+    "yaml": "^2.5.1"
   },
   "devDependencies": {
     "@types/chai": "^4.3.0",
diff --git a/yaml/.coda-pack.json b/yaml/.coda-pack.json
new file mode 100644
index 0000000..0119a86
--- /dev/null
+++ b/yaml/.coda-pack.json
@@ -0,0 +1,3 @@
+{
+  "packId": 34536
+}
\ No newline at end of file
diff --git a/yaml/pack.ts b/yaml/pack.ts
new file mode 100644
index 0000000..02cb405
--- /dev/null
+++ b/yaml/pack.ts
@@ -0,0 +1,140 @@
+import * as coda from "@codahq/packs-sdk";
+import YAML from "yaml";
+
+const OneDaySecs = 24 * 60 * 60;
+
+export const pack = coda.newPack();
+
+const YAMLParam = coda.makeParameter({
+  type: coda.ParameterType.String,
+  name: "yaml",
+  description: "The YAML contents as a string.",
+});
+
+const IndentParam = coda.makeParameter({
+  type: coda.ParameterType.Number,
+  name: "indent",
+  description: "The number of spaces to indent by. Default: 2.",
+  optional: true,
+});
+
+pack.addFormula({
+  name: "FormatYAML",
+  description: "Formats YAML content using the options provided.",
+  parameters: [
+    YAMLParam,
+    IndentParam,
+  ],
+  resultType: coda.ValueType.String,
+  cacheTtlSecs: OneDaySecs,
+  examples: [
+    { 
+      params: [`a: [1, 2]`], 
+      result: trimIndent(`
+        a:
+          - 1
+          - 2
+      `),
+    },
+    { 
+      params: [`a: [1, 2]`, 4], 
+      result: trimIndent(`
+        a:
+            - 1
+            - 2
+      `),
+    },
+  ],
+  execute: async function (args, context) {
+    let [yaml, indent] = args;
+    let options: Record<string, any> = {};
+    if (typeof indent == "number") {
+      options.indent = indent;
+    }
+    let value = parse(yaml);
+    return YAML.stringify(value, null, options);
+  },
+});
+
+pack.addFormula({
+  name: "IsValidYAML",
+  description: "Returns true if the content is valid YAML, false otherwise.",
+  parameters: [
+    YAMLParam,
+  ],
+  resultType: coda.ValueType.Boolean,
+  cacheTtlSecs: OneDaySecs,
+  examples: [
+    { params: [`a: [1, 2]`], result: true },
+    { params: [`a: [1, 2`, ], result: false },
+  ],
+  execute: async function (args, context) {
+    let [yaml] = args;
+    try {
+      YAML.parse(yaml);
+    } catch (e) {
+      if (e.toString().startsWith("YAMLParseError")) {
+        return false;
+      }
+      throw e;
+    }
+    return true;
+  },
+});
+
+pack.addFormula({
+  name: "ToJSON",
+  description: "Converts a YAML string to JSON.",
+  parameters: [
+    YAMLParam,
+    IndentParam,
+  ],
+  resultType: coda.ValueType.String,
+  cacheTtlSecs: OneDaySecs,
+  examples: [
+    { params: [`a: [1, 2]`], result: `{"a":[1,2]}` },
+    { 
+      params: [`a: [1, 2]`, 2], 
+      result: trimIndent(`
+        {
+          "a": [
+            1,
+            2
+          ]
+        }
+      `, true)
+    },
+  ],
+  execute: async function (args, context) {
+    let [yaml, spaces] = args;
+    let value = parse(yaml);
+    return JSON.stringify(value, null, spaces);
+  },
+});
+
+function parse(yaml: string) {
+  try {
+    return YAML.parse(yaml);
+  } catch (e) {
+    if (e.toString().startsWith("YAMLParseError")) {
+      throw new coda.UserVisibleError(e);
+    }
+    throw e;
+  }
+}
+
+function trimIndent(str: string, trim = false) {
+  let lines = str.split("\n");
+  if (lines[0] == "") {
+    lines = lines.slice(1);
+  }
+  if (lines.at(-1) == "") {
+    lines = lines.slice(0, -1);
+  }
+  let indent = lines[0].match(/^\s*/)[0].length;
+  let result = lines.map(line => line.substring(indent)).join("\n");
+  if (trim) {
+    result = result.trim();
+  }
+  return result;
+}
\ No newline at end of file
diff --git a/yaml/tests/pack_test.ts b/yaml/tests/pack_test.ts
new file mode 100644
index 0000000..171856b
--- /dev/null
+++ b/yaml/tests/pack_test.ts
@@ -0,0 +1,26 @@
+import {executeFormulaFromPackDef} from '@codahq/packs-sdk/dist/development';
+import {pack} from '../pack';
+import * as chai from "chai";
+import {assert} from "chai";
+import {describe} from "mocha";
+import {it} from "mocha";
+import chaiAsPromised from "chai-as-promised";
+chai.use(chaiAsPromised);
+chai.should();
+
+describe("Examples", () => {
+  for (let formula of pack.formulas) {
+    describe(formula.name, () => {
+      for (let [i, example] of formula.examples.entries()) {
+        it(`Example ${i}`, async () => {
+          const result = await executeFormulaFromPackDef(pack, formula.name, example.params as any);
+          if (typeof example.result == "object") {
+            assert.deepEqual(result, example.result);
+          } else {
+            assert.equal(result, example.result);
+          }
+        });
+      }
+    });
+  }
+});