diff --git a/content.js b/content.js
index 59c56b8..6bd3eb0 100644
--- a/content.js
+++ b/content.js
@@ -168,9 +168,10 @@
       const included = ISMIStools.filterStudyLoadCourses(courses);
       if (!included.length) throw new Error('No enrolled courses found.');
       const totalUnits = ISMIStools.sumUnits(included);
+      const { truncateDescription } = await browser.storage.local.get('truncateDescription');
       const res = await browser.runtime.sendMessage({
         type: 'generate-pdf',
-        data: { header, courses: included, totalUnits }
+        data: { header, courses: included, totalUnits, truncateDescription: truncateDescription !== false }
       });
       if (!res || !res.ok) throw new Error((res && res.error) || 'PDF generation failed');
       showToast('PDF downloaded.');
diff --git a/pdf.js b/pdf.js
index 35232dd..127b5bd 100644
--- a/pdf.js
+++ b/pdf.js
@@ -64,6 +64,22 @@
     return out.length ? out : [''];
   }
 
+  // Truncate a string to the longest prefix that fits within maxWidth at the
+  // given size, hard-cutting mid-word with no ellipsis. Mirrors the official
+  // PDF which cuts off course descriptions that exceed the column width.
+  function truncateToWidth(text, font, size, maxWidth) {
+    const s = String(text == null ? '' : text).trim();
+    if (!s) return '';
+    if (font.widthOfTextAtSize(s, size) <= maxWidth) return s;
+    let lo = 0, hi = s.length;
+    while (lo < hi) {
+      const mid = Math.ceil((lo + hi) / 2);
+      if (font.widthOfTextAtSize(s.slice(0, mid), size) <= maxWidth) lo = mid;
+      else hi = mid - 1;
+    }
+    return s.slice(0, lo);
+  }
+
   // Compact a degree name for display:
   // "BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY" -> "BS IT".
   // Multi-word fields become initials; single-word fields stay title-cased.
@@ -177,6 +193,9 @@
     const { PDFDocument, StandardFonts, rgb } = PDFLib;
     const header = data.header || {};
     const courses = data.courses || [];
+    // Truncate long course descriptions to a single line matching the official
+    // PDF (default ON). Disabling allows descriptions to wrap.
+    const truncateDescription = data.truncateDescription !== false;
 
     const doc = await PDFDocument.create();
     let page = doc.addPage([612, 792]); // Letter
@@ -278,7 +297,12 @@
       return cols.map((c) => {
         let lines;
         if (c.key === 'description') {
-          lines = wrapLines(cells.description, font, cellSize, c.w - 6);
+          if (truncateDescription) {
+            // Single line, hard-truncated to fit the column (official PDF style).
+            lines = [truncateToWidth(cells.description, font, cellSize, c.w - 3)];
+          } else {
+            lines = wrapLines(cells.description, font, cellSize, c.w - 6);
+          }
           const sched = String(cells.schedule || '');
           if (sched) lines.push(...wrapLines(sched, font, cellSize, c.w - 6));
         } else {
@@ -408,5 +432,5 @@
     return doc.save(); // returns Promise<Uint8Array>
   }
 
-  return { buildStudyLoadPdf, compactProgram, deriveDateRange, formatSchedule, formatFullName };
+  return { buildStudyLoadPdf, compactProgram, deriveDateRange, formatSchedule, formatFullName, truncateToWidth };
 });
diff --git a/popup.html b/popup.html
index 5d21125..f28c2f4 100644
--- a/popup.html
+++ b/popup.html
@@ -32,6 +32,11 @@
     </div>
   </section>
 
+  <section class="tab">
+    <h2>PDF Settings</h2>
+    <label class="row"><input type="checkbox" id="truncateToggle"> Truncate long course descriptions (official PDF style)</label>
+  </section>
+
   <script src="popup.js"></script>
 </body>
 </html>
diff --git a/popup.js b/popup.js
index e7aae3a..5de4e9e 100644
--- a/popup.js
+++ b/popup.js
@@ -18,6 +18,15 @@ $('#masterToggle').addEventListener('change', async (e) => {
   $('#masterLabel').textContent = e.target.checked ? 'Enabled' : 'Disabled';
 });
 
+// ---- PDF settings: truncate long course descriptions (default ON) ----
+async function loadTruncate() {
+  const { truncateDescription } = await browser.storage.local.get('truncateDescription');
+  $('#truncateToggle').checked = truncateDescription !== false;
+}
+$('#truncateToggle').addEventListener('change', async (e) => {
+  await browser.storage.local.set({ truncateDescription: e.target.checked });
+});
+
 // ---- Profiles ----
 async function getProfiles() {
   const { profiles } = await browser.storage.local.get(PROFILES_KEY);
@@ -104,5 +113,6 @@ $('#saveProfile').addEventListener('click', async () => {
 // ---- Init ----
 (async function init() {
   await loadMaster();
+  await loadTruncate();
   renderProfiles(await getProfiles());
 })();
diff --git a/test/pdf.test.js b/test/pdf.test.js
index 222a0e2..be95d7b 100644
--- a/test/pdf.test.js
+++ b/test/pdf.test.js
@@ -5,7 +5,7 @@ const os = require('node:os');
 const path = require('node:path');
 const { execFileSync } = require('node:child_process');
 global.PDFLib = require('pdf-lib');
-const { buildStudyLoadPdf, compactProgram, deriveDateRange, formatSchedule, formatFullName } = require('../pdf.js');
+const { buildStudyLoadPdf, compactProgram, deriveDateRange, formatSchedule, formatFullName, truncateToWidth } = require('../pdf.js');
 
 const sampleData = {
   header: {
@@ -88,3 +88,16 @@ test('deriveDateRange maps semesters', () => {
   assert.strictEqual(deriveDateRange('Summer 2026'), 'JUNE - JULY');
   assert.strictEqual(deriveDateRange(''), '');
 });
+
+test('truncateToWidth hard-cuts text to fit within maxWidth', async () => {
+  const doc = await global.PDFLib.PDFDocument.create();
+  const font = doc.embedStandardFont(global.PDFLib.StandardFonts.Helvetica);
+  const longText = 'APPLICATION DEVELOPMENT AND EMERGING TECHNOLOGIES';
+  const tr = truncateToWidth(longText, font, 8, 100);
+  assert.ok(tr.length < longText.length, 'long text should be cut down');
+  assert.ok(longText.startsWith(tr), 'result must be a prefix of the input');
+  assert.ok(font.widthOfTextAtSize(tr, 8) <= 100, 'truncated line must fit maxWidth');
+  const short = 'DATA STRUCTURES';
+  assert.strictEqual(truncateToWidth(short, font, 8, 200), short);
+  assert.strictEqual(truncateToWidth('', font, 8, 200), '');
+});