diff --git a/main.html b/main.html
index 5f9c29a8..bd1775b8 100644
--- a/main.html
+++ b/main.html
@@ -20,6 +20,7 @@
                 <label for="open-file-input" class="dropdown-item mb-0" id="open-dropdown-item">Open</label>
                 <input type="file" accept=".xlsx,.xls,.tsv,.csv" class="form-control-file" id="open-file-input">
                 <span class="dropdown-item" data-toggle="modal" data-target="#save-as-modal">Save As...</span>
+                <span class="dropdown-item" data-toggle="modal" data-target="#export-to-modal">Export To...</span>
               </div>
             </div>
             <div class="btn-group" id="settings-dropdown-btn-group" role="group">
@@ -69,11 +70,12 @@
                   <span class="text-danger">Clear existing data?</span>
                 </div>
               </div>
-              <div class="row justify-content-end">
-                <div class="col-3 col-sm-2 mr-3">
+              <div class="row mt-3">
+                <div class="col-2 col-sm-6"></div>
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                 </div>
-                <div class="col-3 col-sm-2">
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-danger" id="clear-data-confirm-btn" data-dismiss="modal">Clear</button>
                 </div>
               </div>
@@ -105,11 +107,12 @@
                   </div>
                 </div>
               </div>
-              <div class="row justify-content-end mt-3">
-                <div class="col-3 col-sm-2 mr-3">
+              <div class="row mt-3">
+                <div class="col-2 col-sm-6"></div>
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                 </div>
-                <div class="col-3 col-sm-2">
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-primary" id="save-as-confirm-btn">Save</button>
                 </div>
               </div>
@@ -118,6 +121,45 @@
         </div>
       </div>
     </div>
+    <div class="modal" id="export-to-modal" tabindex="-1" role="dialog">
+      <div class="modal-dialog" role="document">
+        <div class="modal-content">
+          <div class="modal-body">
+            <div class="container-fluid">
+              <div class="row">
+                <div class="col text-danger" id="export-to-err-msg"></div>
+              </div>
+              <div class="row">
+                <div class="col-12 col-sm-8">
+                  <div class="input-group">
+                    <input type="text" class="form-control" id="base-name-export-to-input" placeholder="file name">
+                    <div class="input-group-append">
+                      <div class="input-group-text">.xls</div>
+                    </div>
+                  </div>
+                </div>
+                <div class="col mt-2 mt-sm-0">
+                  <select class="form-control" id="export-to-format-select">
+                    <option value="" disabled selected>Format</option>
+                    <option value="gisaid">GISAID</option>
+                    <option value="irida">IRIDA</option>
+                  </select>
+                </div>
+              </div>
+              <div class="row mt-3">
+                <div class="col-2 col-sm-6"></div>
+                <div class="col d-flex justify-content-end">
+                  <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
+                </div>
+                <div class="col d-flex justify-content-end">
+                  <button type="button" class="btn btn-primary" id="export-to-confirm-btn">Export</button>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
     <div class="modal" id="specify-headers-modal" tabindex="-1" role="dialog">
       <div class="modal-dialog" role="document">
         <div class="modal-content">
@@ -162,8 +204,8 @@
               <div class="row">
                 <div class="col text-danger" id="specify-headers-err-msg">Invalid row</div>
               </div>
-              <div class="row justify-content-end mt-3">
-                <div class="col-3 col-sm-2">
+              <div class="row mt-3">
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-primary" id="specify-headers-confirm-btn">Ok</button>
                 </div>
               </div>
@@ -180,8 +222,8 @@
               <div class="row">
                 <div class="col text-danger" id="open-err-msg"></div>
               </div>
-              <div class="row justify-content-end mt-3">
-                <div class="col-3 col-sm-2">
+              <div class="row mt-3">
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-secondary" data-dismiss="modal">Ok</button>
                 </div>
               </div>
@@ -198,8 +240,8 @@
               <div class="row">
                 <div class="col" id="field-description-text"></div>
               </div>
-              <div class="row justify-content-end mt-3">
-                <div class="col-3 col-sm-2">
+              <div class="row mt-3">
+                <div class="col d-flex justify-content-end">
                   <button type="button" class="btn btn-secondary" data-dismiss="modal">Ok</button>
                 </div>
               </div>
diff --git a/main.js b/main.js
index fc42f026..02a88d3c 100644
--- a/main.js
+++ b/main.js
@@ -309,8 +309,8 @@ const getTrimmedData = (hot) => {
 };
 
 /**
- * Download grid headers and data to file.
- * @param {Array<Array<String>>} matrix Grid data.
+ * Download matrix to file.
+ * @param {Array<Array<String>>} matrix Matrix to download.
  * @param {String} baseName Basename of downloaded file.
  * @param {String} ext Extension of downloaded file.
  * @param {Object} xlsx SheetJS variable.
@@ -330,6 +330,94 @@ const exportFile = (matrix, baseName, ext, xlsx) => {
   }
 };
 
+/**
+ * Download secondary headers and grid data.
+ * @param {String} baseName Basename of downloaded file.
+ * @param {Object} hot Handonstable grid instance.
+ * @param {Object} data See `data.js`.
+ * @param {Object} xlsx SheetJS variable.
+ */
+const exportIRIDA = (baseName, hot, data, xlsx) => {
+  const matrix = [getFlatHeaders(data)[1], ...getTrimmedData(hot)];
+  exportFile(matrix, baseName, 'xls', xlsx);
+};
+
+/**
+ * Download grid mapped to GISAID format.
+ * @param {String} baseName Basename of downloaded file.
+ * @param {Object} hot Handonstable grid instance.
+ * @param {Object} data See `data.js`.
+ * @param {Object} xlsx SheetJS variable.
+ */
+const exportGISAID = (baseName, hot, data, xlsx) => {
+  // TODO: As we add more formats, we should add such headers to `data.js`
+  const GISAIDHeaders = [
+    'Submitter', 'FASTA filename', 'Virus name', 'Type',
+    'Passage details/history', 'Collection date', 'Location',
+    'Additional location information', 'Host', 'Additional host information',
+    'Gender', 'Patient age', 'Patient status', 'Specimen source', 'Outbreak',
+    'Last vaccinated', 'Treatment', 'Sequencing technology', 'Assembly method',
+    'Coverage', 'Originating lab', 'Address',
+    'Sample ID given by the sample provider', 'Submitting lab', 'Address',
+    'Sample ID given by the submitting laboratory', 'Authors',
+  ];
+
+  // Create a map of GISAID headers to our fields. It is a one-to-many
+  // relationship, with indices representing the maps.
+  const headerMap = {};
+  for (const [GISAIDIndex, _] of GISAIDHeaders.entries()) {
+    headerMap[GISAIDIndex] = [];
+  }
+  const fields = getFields(data);
+  for (const [fieldIndex, field] of fields.entries()) {
+    if (field.GISAID) {
+      let GISAIDIndex = GISAIDHeaders.indexOf(field.GISAID);
+      // GISAID has two fields called 'Address'
+      const secondAddress = 'sequence submitter contact address';
+      if (field.GISAID === 'Address' && field.fieldName === secondAddress) {
+        GISAIDIndex = GISAIDHeaders.indexOf(field.GISAID, GISAIDIndex+1);
+      }
+      headerMap[GISAIDIndex].push(fieldIndex);
+    }
+  }
+
+  // Construct GISAID's matrix
+  const mappedMatrix = [GISAIDHeaders];
+  const unmappedMatrix = getTrimmedData(hot);
+  for (const unmappedRow of unmappedMatrix) {
+    const mappedRow = [];
+    for (const [GISAIDIndex, GISAIDHeader] of GISAIDHeaders.entries()) {
+      if (GISAIDHeader === 'Type') {
+        mappedRow.push('coronavirus');
+        continue;
+      }
+
+      const mappedCell = [];
+      for (const mappedFieldIndex of headerMap[GISAIDIndex]) {
+        let mappedCellVal = unmappedRow[mappedFieldIndex];
+        if (!mappedCellVal) continue;
+
+        let unknown = mappedCellVal.toLowerCase() === 'missing';
+        unknown |= mappedCellVal.toLowerCase() === 'not applicable';
+        if (unknown) {
+          mappedCellVal = 'Unknown';
+        }
+
+        const fieldName = fields[mappedFieldIndex].fieldName;
+        if (fieldName === 'passage number') {
+          mappedCellVal = 'passage number ' + mappedCellVal;
+        }
+
+        mappedCell.push(mappedCellVal);
+      }
+      mappedRow.push(mappedCell.join(';'));
+    }
+    mappedMatrix.push(mappedRow);
+  }
+
+  exportFile(mappedMatrix, baseName, 'xls', xlsx);
+};
+
 /**
  * Read local file opened by user.
  * Only reads `xlsx`, `xlsx`, `csv` and `tsv` files.
@@ -692,7 +780,7 @@ $(document).ready(() => {
   });
 
   // File -> Save
-  $('#save-as-confirm-btn').click((e) => {
+  $('#save-as-confirm-btn').click(() => {
     try {
       const baseName = $('#base-name-save-as-input').val();
       const ext = $('#file-ext-save-as-select').val();
@@ -709,6 +797,27 @@ $(document).ready(() => {
     $('#base-name-save-as-input').val('');
   });
 
+  // File -> Export to...
+  $('#export-to-confirm-btn').click(() => {
+    const baseName = $('#base-name-export-to-input').val();
+    const exportFormat = $('#export-to-format-select').val();
+    if (!exportFormat) {
+      $('#export-to-err-msg').text('Select a format');
+      return;
+    }
+    if (exportFormat === 'gisaid') {
+      exportGISAID(baseName, HOT, DATA, XLSX);
+    } else if (exportFormat === 'irida') {
+      exportIRIDA(baseName, HOT, DATA, XLSX);
+    }
+    $('#export-to-modal').modal('hide');
+  });
+  // Reset export modal values when the modal is closed
+  $('#export-to-modal').on('hidden.bs.modal', () => {
+    $('#export-to-err-msg').text('');
+    $('#base-name-export-to-input').val('');
+  });
+
   // Settings -> Show ... columns
   const showColsSelectors =
       ['#show-all-cols-dropdown-item', '#show-required-cols-dropdown-item'];