diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 66521bcd54..fddcd888b5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -41,5 +41,12 @@ jobs:
         run: npm run check:fmt
       - name: Typecheck
         run: npm run typecheck
-      - name: Run infrastructure tests
+      - name: Infrastructure tests
         run: npm test
+
+      - name: Start local Docker preview
+        run: |
+          ./start &
+          sleep 20
+      - name: Check that pages render
+        run: npm run check-pages-render
diff --git a/.github/workflows/external-link-checker.yml b/.github/workflows/nightly-extended-checks.yml
similarity index 68%
rename from .github/workflows/external-link-checker.yml
rename to .github/workflows/nightly-extended-checks.yml
index feb07059b7..983cbfe801 100644
--- a/.github/workflows/external-link-checker.yml
+++ b/.github/workflows/nightly-extended-checks.yml
@@ -10,16 +10,16 @@
 # copyright notice, and modified files need to carry a notice indicating
 # that they have been altered from the originals.
 
-# This Action validates all the links in the documentation, including
-# external links. This Action will be run at 00:00 (UTC) every day.
+# This Action runs every day at 00:00 UTC to check things that
+# we care about but would be too slow to check in every PR.
 
-name: Check external links
+name: Nightly extended checks
 on:
   schedule:
     - cron: "0 0 * * *"
 
 jobs:
-  external-link-checker:
+  nightly-extended-checks:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'Qiskit'
     steps:
@@ -34,8 +34,20 @@ jobs:
       - name: Check external links
         run: >
           npm run check:links --
-          --current-apis
           --qiskit-release-notes
+          --current-apis
           --historical-apis
           --skip-broken-historical
           --external
+
+      - name: Start local Docker preview
+        run: |
+          ./start &
+          sleep 20
+      - name: Check API pages render
+        run: >
+          npm run check-pages-render --
+          --qiskit-release-notes
+          --current-apis
+          --historical-apis
+          --translations
diff --git a/README.md b/README.md
index 88d94533af..88700c3d4c 100644
--- a/README.md
+++ b/README.md
@@ -218,6 +218,20 @@ Ayyyyy, this is a fake description.
 
 If the word appears in multiple files, prefer the second approach to add it to `cSpell.json`.
 
+## Check that pages render
+
+It's possible to write broken pages that crash when loaded. This is usually due to syntax errors.
+
+To check that all the non-API docs render:
+
+1. Start up the local preview with `./start` by following the instructions at [Preview the docs locally](#preview-the-docs-locally)
+2. In a new tab, `npm run check-pages-render`
+
+You can also check that API docs and translations render by using any of these arguments: `npm run check-pages-render -- --qiskit-release-notes --current-apis --historical-apis --translations`. Warning that this is exponentially slower.
+
+CI will check on every PR that non-API docs correctly render. We also run a nightly cron job to check the API docs and
+translations.
+
 ## Format TypeScript files
 
 If you're working on our support code in `scripts/`, run `npm run fmt` to automatically format the files.
diff --git a/package.json b/package.json
index 5fe204a7b6..d764c91f79 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "check:links": "node -r esbuild-register scripts/commands/checkLinks.ts",
     "check:spelling": "cspell --relative --no-progress docs/**/*.md* docs/api/**/*.md*",
     "check:fmt": "prettier --check .",
+    "check-pages-render": "node -r esbuild-register scripts/commands/checkPagesRender.ts",
     "fmt": "prettier --write .",
     "test": "jest",
     "typecheck": "tsc",
diff --git a/scripts/commands/checkPagesRender.ts b/scripts/commands/checkPagesRender.ts
new file mode 100644
index 0000000000..b3e81d8c38
--- /dev/null
+++ b/scripts/commands/checkPagesRender.ts
@@ -0,0 +1,149 @@
+// This code is a Qiskit project.
+//
+// (C) Copyright IBM 2024.
+//
+// This code is licensed under the Apache License, Version 2.0. You may
+// obtain a copy of this license in the LICENSE file in the root directory
+// of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+//
+// Any modifications or derivative works of this code must retain this
+// copyright notice, and modified files need to carry a notice indicating
+// that they have been altered from the originals.
+
+import { globby } from "globby";
+import yargs from "yargs/yargs";
+import { hideBin } from "yargs/helpers";
+
+import { zxMain } from "../lib/zx";
+
+const PORT = 3000;
+
+interface Arguments {
+  [x: string]: unknown;
+  currentApis: boolean;
+  historicalApis: boolean;
+  qiskitReleaseNotes: boolean;
+  translations: boolean;
+}
+
+const readArgs = (): Arguments => {
+  return yargs(hideBin(process.argv))
+    .version(false)
+    .option("current-apis", {
+      type: "boolean",
+      default: false,
+      description: "Check the pages in the current API docs.",
+    })
+    .option("historical-apis", {
+      type: "boolean",
+      default: false,
+      description:
+        "Check the pages in the historical API docs, e.g. `api/qiskit/0.44`. " +
+        "Warning: this is slow.",
+    })
+    .option("qiskit-release-notes", {
+      type: "boolean",
+      default: false,
+      description: "Check the pages in the `api/qiskit/release-notes` folder.",
+    })
+    .option("translations", {
+      type: "boolean",
+      default: false,
+      description: "Check the pages in the `translations/` subfolders.",
+    })
+    .parseSync();
+};
+
+zxMain(async () => {
+  const args = readArgs();
+  await validateDockerRunning();
+  const files = await determineFilePaths(args);
+
+  let allGood = true;
+  let numFilesChecked = 1;
+  for (const fp of files) {
+    const rendered = await canRender(fp);
+    if (!rendered) {
+      console.error(`❌ Failed to render: ${fp}`);
+      allGood = false;
+    }
+
+    // This script can be slow, so log progress every 10 files.
+    if (numFilesChecked % 10 == 0) {
+      console.log(`Checked ${numFilesChecked} / ${files.length} pages`);
+    }
+    numFilesChecked++;
+  }
+
+  if (allGood) {
+    console.info("✅ All pages render without crashing");
+  } else {
+    console.error(
+      "💔 Some pages crash when rendering. This is usually due to invalid syntax, such as forgetting " +
+        "the closing component tag, like `</Admonition>`. You can sometimes get a helpful error message " +
+        "by previewing the docs locally or in CI. See the README for instructions.",
+    );
+    process.exit(1);
+  }
+});
+
+async function canRender(fp: string): Promise<boolean> {
+  const url = pathToUrl(fp);
+  try {
+    const response = await fetch(url);
+    if (response.status >= 300) {
+      return false;
+    }
+  } catch (error) {
+    return false;
+  }
+
+  return true;
+}
+
+function pathToUrl(path: string): string {
+  const strippedPath = path
+    .replace("docs/", "")
+    .replace("translations/", "")
+    .replace(/\.(?:md|mdx|ipynb)$/g, "");
+  return `http://localhost:${PORT}/${strippedPath}`;
+}
+
+async function validateDockerRunning(): Promise<void> {
+  try {
+    const response = await fetch(`http://localhost:${PORT}`);
+    if (response.status !== 404) {
+      console.error(
+        "Failed to access http://localhost:3000. Have you started the Docker server with `./start`? " +
+          "Refer to the README for instructions.",
+      );
+      process.exit(1);
+    }
+  } catch (error) {
+    console.error(
+      "Error when accessing http://localhost:3000. Make sure that you've started the Docker server " +
+        "with `./start`. Refer to the README for instructions.\n\n" +
+        `${error}`,
+    );
+    process.exit(1);
+  }
+}
+
+async function determineFilePaths(args: Arguments): Promise<string[]> {
+  const globs = ["docs/**/*.{ipynb,md,mdx}"];
+  if (!args.currentApis) {
+    globs.push("!docs/api/{qiskit,qiskit-ibm-provider,qiskit-ibm-runtime}/*");
+  }
+  if (!args.historicalApis) {
+    globs.push(
+      "!docs/api/{qiskit,qiskit-ibm-provider,qiskit-ibm-runtime}/[0-9]*/*",
+    );
+  }
+  if (!args.qiskitReleaseNotes) {
+    globs.push("!docs/api/qiskit/release-notes/*");
+  }
+  if (args.translations) {
+    globs.push("translations/**/*.{ipynb,md,mdx}");
+  }
+  return globby(globs);
+}
diff --git a/scripts/lib/links/LinkChecker.ts b/scripts/lib/links/LinkChecker.ts
index db9e5cbdf9..0146b0e92e 100644
--- a/scripts/lib/links/LinkChecker.ts
+++ b/scripts/lib/links/LinkChecker.ts
@@ -89,7 +89,7 @@ export class Link {
   async checkExternalLink(): Promise<string | null> {
     try {
       const response = await fetch(this.value, {
-        headers: { "User-Agent": "prn-broken-links-finder" },
+        headers: { "User-Agent": "qiskit-documentation-broken-links-finder" },
       });
 
       if (response.status >= 300) {