diff --git a/packages/content-type-text/.eslintrc.cjs b/packages/content-type-text/.eslintrc.cjs
new file mode 100644
index 0000000..d46b01d
--- /dev/null
+++ b/packages/content-type-text/.eslintrc.cjs
@@ -0,0 +1,7 @@
+module.exports = {
+  root: true,
+  extends: ["custom"],
+  parserOptions: {
+    project: "./tsconfig.eslint.json",
+  },
+};
diff --git a/packages/content-type-text/LICENSE b/packages/content-type-text/LICENSE
new file mode 100644
index 0000000..ae6695a
--- /dev/null
+++ b/packages/content-type-text/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 XMTP (xmtp.org)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/packages/content-type-text/README.md b/packages/content-type-text/README.md
new file mode 100644
index 0000000..8a994e3
--- /dev/null
+++ b/packages/content-type-text/README.md
@@ -0,0 +1,45 @@
+# Text content type
+
+This package provides an XMTP content type to support text messages.
+
+## Install the package
+
+```bash
+# npm
+npm i @xmtp/content-type-text
+
+# yarn
+yarn add @xmtp/content-type-text
+
+# pnpm
+pnpm i @xmtp/content-type-text
+```
+
+## Send a text message
+
+Use a string to send a text message. It's not required to specify a content type in the send options for text messages.
+
+```tsx
+await conversation.send("gm");
+```
+
+## Developing
+
+Run `yarn dev` to build the content type and watch for changes, which will trigger a rebuild.
+
+## Testing
+
+Before running unit tests, start the required Docker container at the root of this repository. For more info, see [Running tests](../../README.md#running-tests).
+
+## Useful commands
+
+- `yarn build`: Builds the content type
+- `yarn clean`: Removes `node_modules`, `dist`, and `.turbo` folders
+- `yarn dev`: Builds the content type and watches for changes, which will trigger a rebuild
+- `yarn format`: Runs prettier format and write changes
+- `yarn format:check`: Runs prettier format check
+- `yarn lint`: Runs ESLint
+- `yarn test:setup`: Starts a necessary docker container for testing
+- `yarn test:teardown`: Stops docker container for testing
+- `yarn test`: Runs all unit tests
+- `yarn typecheck`: Runs `tsc`
diff --git a/packages/content-type-text/package.json b/packages/content-type-text/package.json
new file mode 100644
index 0000000..9f2cd33
--- /dev/null
+++ b/packages/content-type-text/package.json
@@ -0,0 +1,98 @@
+{
+  "name": "@xmtp/content-type-text",
+  "version": "1.0.0",
+  "description": "An XMTP content type to support text messages",
+  "keywords": [
+    "xmtp",
+    "messaging",
+    "web3",
+    "js",
+    "ts",
+    "javascript",
+    "typescript",
+    "content-types"
+  ],
+  "homepage": "https://github.com/xmtp/xmtp-js-content-types",
+  "bugs": {
+    "url": "https://github.com/xmtp/xmtp-js-content-types/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/xmtp/xmtp-js-content-types.git",
+    "directory": "packages/content-type-text"
+  },
+  "license": "MIT",
+  "author": "XMTP Labs <eng@xmtp.com>",
+  "sideEffects": false,
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "browser": "./dist/browser/index.js",
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs"
+    }
+  },
+  "main": "dist/index.cjs",
+  "module": "dist/index.js",
+  "browser": "dist/browser/index.js",
+  "types": "dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "yarn clean:dist && yarn rollup -c",
+    "clean": "rimraf .turbo node_modules && yarn clean:dist",
+    "clean:dist": "rimraf dist",
+    "dev": "yarn clean:dist && yarn rollup -c --watch",
+    "format": "yarn format:base -w .",
+    "format:base": "prettier --ignore-path ../../.gitignore",
+    "format:check": "yarn format:base -c .",
+    "lint": "eslint . --ignore-path ../../.gitignore",
+    "test": "yarn test:node && yarn test:jsdom",
+    "test:jsdom": "NODE_TLS_REJECT_UNAUTHORIZED=0 vitest run --environment happy-dom",
+    "test:node": "NODE_TLS_REJECT_UNAUTHORIZED=0 vitest run --environment node",
+    "typecheck": "tsc --noEmit"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 3 chrome versions",
+      "last 3 firefox versions",
+      "last 3 safari versions"
+    ]
+  },
+  "dependencies": {
+    "@xmtp/content-type-primitives": "^1.0.1"
+  },
+  "devDependencies": {
+    "@ianvs/prettier-plugin-sort-imports": "^4.2.1",
+    "@rollup/plugin-terser": "^0.4.4",
+    "@rollup/plugin-typescript": "^11.1.6",
+    "@types/node": "^18.19.22",
+    "@xmtp/xmtp-js": "^11.6.3",
+    "buffer": "^6.0.3",
+    "eslint": "^8.57.0",
+    "eslint-config-custom": "workspace:*",
+    "ethers": "^6.11.1",
+    "happy-dom": "^13.7.3",
+    "prettier": "^3.2.5",
+    "prettier-plugin-packagejson": "^2.4.12",
+    "rimraf": "^5.0.5",
+    "rollup": "^4.12.1",
+    "rollup-plugin-dts": "^6.1.0",
+    "rollup-plugin-filesize": "^10.0.0",
+    "typescript": "^5.4.2",
+    "vite": "^5.1.6",
+    "vitest": "^1.3.1"
+  },
+  "publishConfig": {
+    "access": "public",
+    "provenance": true,
+    "registry": "https://registry.npmjs.org/"
+  }
+}
diff --git a/packages/content-type-text/rollup.config.js b/packages/content-type-text/rollup.config.js
new file mode 100644
index 0000000..b6b0494
--- /dev/null
+++ b/packages/content-type-text/rollup.config.js
@@ -0,0 +1,58 @@
+import terser from "@rollup/plugin-terser";
+import typescript from "@rollup/plugin-typescript";
+import { defineConfig } from "rollup";
+import { dts } from "rollup-plugin-dts";
+import filesize from "rollup-plugin-filesize";
+
+const plugins = [
+  typescript({
+    declaration: false,
+    declarationMap: false,
+  }),
+  filesize({
+    showMinifiedSize: false,
+  }),
+];
+
+const external = ["@xmtp/xmtp-js"];
+
+export default defineConfig([
+  {
+    input: "src/index.ts",
+    output: {
+      file: "dist/index.js",
+      format: "es",
+      sourcemap: true,
+    },
+    plugins,
+    external,
+  },
+  {
+    input: "src/index.ts",
+    output: {
+      file: "dist/browser/index.js",
+      format: "es",
+      sourcemap: true,
+    },
+    plugins: [...plugins, terser()],
+    external,
+  },
+  {
+    input: "src/index.ts",
+    output: {
+      file: "dist/index.cjs",
+      format: "cjs",
+      sourcemap: true,
+    },
+    plugins,
+    external,
+  },
+  {
+    input: "src/index.ts",
+    output: {
+      file: "dist/index.d.ts",
+      format: "es",
+    },
+    plugins: [dts()],
+  },
+]);
diff --git a/packages/content-type-text/src/Text.test.ts b/packages/content-type-text/src/Text.test.ts
new file mode 100644
index 0000000..8f98d7d
--- /dev/null
+++ b/packages/content-type-text/src/Text.test.ts
@@ -0,0 +1,44 @@
+import { describe, expect, it } from "vitest";
+import { ContentTypeText, Encoding, TextCodec } from "./Text";
+
+describe("ContentTypeText", () => {
+  it("can encode/decode text", () => {
+    const text = "Hey";
+    const codec = new TextCodec();
+    const ec = codec.encode(text);
+    expect(ec.type.sameAs(ContentTypeText)).toBe(true);
+    expect(ec.parameters.encoding).toEqual(Encoding.utf8);
+    const text2 = codec.decode(ec);
+    expect(text2).toEqual(text);
+  });
+
+  it("defaults to utf-8", () => {
+    const text = "Hey";
+    const codec = new TextCodec();
+    const ec = codec.encode(text);
+    expect(ec.type.sameAs(ContentTypeText)).toBe(true);
+    expect(ec.parameters.encoding).toEqual(Encoding.utf8);
+    const text2 = codec.decode(ec);
+    expect(text2).toEqual(text);
+  });
+
+  it("throws on invalid input", () => {
+    const codec = new TextCodec();
+    const ec = {
+      type: ContentTypeText,
+      parameters: {},
+      content: {} as Uint8Array,
+    };
+    expect(() => codec.decode(ec)).toThrow();
+  });
+
+  it("throws on unknown encoding", () => {
+    const codec = new TextCodec();
+    const ec = {
+      type: ContentTypeText,
+      parameters: { encoding: "UTF-16" },
+      content: new Uint8Array(0),
+    };
+    expect(() => codec.decode(ec)).toThrow("unrecognized encoding UTF-16");
+  });
+});
diff --git a/packages/content-type-text/src/Text.ts b/packages/content-type-text/src/Text.ts
new file mode 100644
index 0000000..12f7471
--- /dev/null
+++ b/packages/content-type-text/src/Text.ts
@@ -0,0 +1,46 @@
+import {
+  ContentTypeId,
+  type ContentCodec,
+  type EncodedContent,
+} from "@xmtp/content-type-primitives";
+
+export const ContentTypeText = new ContentTypeId({
+  authorityId: "xmtp.org",
+  typeId: "text",
+  versionMajor: 1,
+  versionMinor: 0,
+});
+
+export enum Encoding {
+  utf8 = "UTF-8",
+}
+
+export class TextCodec implements ContentCodec<string> {
+  get contentType(): ContentTypeId {
+    return ContentTypeText;
+  }
+
+  encode(content: string): EncodedContent {
+    return {
+      type: ContentTypeText,
+      parameters: { encoding: Encoding.utf8 },
+      content: new TextEncoder().encode(content),
+    };
+  }
+
+  decode(content: EncodedContent) {
+    const { encoding } = content.parameters;
+    if ((encoding as Encoding) !== Encoding.utf8) {
+      throw new Error(`unrecognized encoding ${encoding}`);
+    }
+    return new TextDecoder().decode(content.content);
+  }
+
+  fallback() {
+    return undefined;
+  }
+
+  shouldPush() {
+    return true;
+  }
+}
diff --git a/packages/content-type-text/src/index.ts b/packages/content-type-text/src/index.ts
new file mode 100644
index 0000000..41b613e
--- /dev/null
+++ b/packages/content-type-text/src/index.ts
@@ -0,0 +1 @@
+export { ContentTypeText, Encoding, TextCodec } from "./Text";
diff --git a/packages/content-type-text/tsconfig.eslint.json b/packages/content-type-text/tsconfig.eslint.json
new file mode 100644
index 0000000..5ee5f6f
--- /dev/null
+++ b/packages/content-type-text/tsconfig.eslint.json
@@ -0,0 +1,5 @@
+{
+  "extends": "./tsconfig.json",
+  "include": [".", ".eslintrc.cjs", "rollup.config.js"],
+  "exclude": ["dist", "node_modules"]
+}
diff --git a/packages/content-type-text/tsconfig.json b/packages/content-type-text/tsconfig.json
new file mode 100644
index 0000000..69f4541
--- /dev/null
+++ b/packages/content-type-text/tsconfig.json
@@ -0,0 +1,5 @@
+{
+  "extends": "tsconfig/build.json",
+  "include": ["src"],
+  "exclude": ["dist", "node_modules"]
+}
diff --git a/yarn.lock b/yarn.lock
index 8788dd6..1dcbe8a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2084,6 +2084,33 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@xmtp/content-type-text@workspace:packages/content-type-text":
+  version: 0.0.0-use.local
+  resolution: "@xmtp/content-type-text@workspace:packages/content-type-text"
+  dependencies:
+    "@ianvs/prettier-plugin-sort-imports": "npm:^4.2.1"
+    "@rollup/plugin-terser": "npm:^0.4.4"
+    "@rollup/plugin-typescript": "npm:^11.1.6"
+    "@types/node": "npm:^18.19.22"
+    "@xmtp/content-type-primitives": "npm:^1.0.1"
+    "@xmtp/xmtp-js": "npm:^11.6.3"
+    buffer: "npm:^6.0.3"
+    eslint: "npm:^8.57.0"
+    eslint-config-custom: "workspace:*"
+    ethers: "npm:^6.11.1"
+    happy-dom: "npm:^13.7.3"
+    prettier: "npm:^3.2.5"
+    prettier-plugin-packagejson: "npm:^2.4.12"
+    rimraf: "npm:^5.0.5"
+    rollup: "npm:^4.12.1"
+    rollup-plugin-dts: "npm:^6.1.0"
+    rollup-plugin-filesize: "npm:^10.0.0"
+    typescript: "npm:^5.4.2"
+    vite: "npm:^5.1.6"
+    vitest: "npm:^1.3.1"
+  languageName: unknown
+  linkType: soft
+
 "@xmtp/content-type-transaction-reference@workspace:packages/content-type-transaction-reference":
   version: 0.0.0-use.local
   resolution: "@xmtp/content-type-transaction-reference@workspace:packages/content-type-transaction-reference"