diff --git a/assets/webui/index.html b/assets/webui/index.html
index d184bec..e11612b 100644
--- a/assets/webui/index.html
+++ b/assets/webui/index.html
@@ -209,7 +209,6 @@
 						<div id="convertFontRow" class="form-row" hidden><label for="convertFontMode">字体</label><select id="convertFontMode"><option value="0">保持</option><option value="1">内嵌</option><option value="2">外部</option></select></div>
 						<div id="convertDPIRow" class="form-row" hidden><label for="convertDPI">精度</label><div class="form-select"><select id="convertDPI"><option value="96">96 DPI</option><option value="150">150 DPI</option><option value="300" selected>300 DPI</option><option value="600">600 DPI</option></select><span id="convertDPIValue">300</span></div></div>
 						<div class="form-row"><label for="convertDestination">输出</label><select id="convertDestination"><option value="directory">目录</option><option value="archive">打包</option></select></div>
-						<div class="form-row"><label for="convertParallel">并行</label><input id="convertParallel" type="number" min="1" step="1" placeholder="自动"></div>
 					</div>
 					<button id="convertClose" class="button" type="button">关闭</button><button id="convertCancel" class="button" type="button" hidden>取消</button><button id="convertStart" class="button" type="submit" disabled>转换</button>
 				</div>
diff --git a/assets/webui/ofdgo.css b/assets/webui/ofdgo.css
index a48e6c1..e7f0834 100644
--- a/assets/webui/ofdgo.css
+++ b/assets/webui/ofdgo.css
@@ -795,7 +795,7 @@ button:not(:disabled):hover {
 .convert-options {
 	flex: none;
 	display: grid;
-	grid-template-columns: repeat(5, minmax(0, 1fr));
+	grid-template-columns: repeat(4, minmax(0, 1fr));
 	grid-column: 1 / -1;
 	grid-row: 1;
 	width: 100%;
@@ -804,11 +804,11 @@ button:not(:disabled):hover {
 }
 
 .convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow[hidden]) {
-	grid-template-columns: repeat(4, minmax(0, 1fr));
+	grid-template-columns: repeat(3, minmax(0, 1fr));
 }
 
 .convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) {
-	grid-template-columns: repeat(6, minmax(0, 1fr));
+	grid-template-columns: repeat(5, minmax(0, 1fr));
 }
 
 .convert-options .form-row {
@@ -1067,8 +1067,8 @@ button:not(:disabled):hover {
 	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) {
 		grid-template-columns: repeat(2, minmax(0, 1fr));
 	}
-	.convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow:not([hidden])) .form-row:last-child,
-	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow[hidden]) .form-row:last-child {
+	.convert-options:has(#convertDPIRow[hidden]):has(#convertFontRow[hidden]) .form-row:last-child,
+	.convert-options:has(#convertDPIRow:not([hidden])):has(#convertFontRow:not([hidden])) .form-row:last-child {
 		grid-column: 1 / -1;
 	}
 	.convert-options .form-row {
diff --git a/assets/webui/ofdgo.js b/assets/webui/ofdgo.js
index 6709ad7..f7c672c 100644
--- a/assets/webui/ofdgo.js
+++ b/assets/webui/ofdgo.js
@@ -23,7 +23,7 @@ const STATUS = {
 const wasmRequests = new Map();
 const metaContents = new WeakMap();
 const batch = { items: [], formats: [], running: false, canceled: false, workers: new Set(), requests: new Map(), sequence: 0, progress: null, jobs: [], credentials: Promise.resolve() };
-const batchElements = Object.fromEntries(["Button", "Panel", "Form", "Input", "Add", "Clear", "Count", "Format", "Compression", "FontRow", "FontMode", "Destination", "DPIRow", "DPI", "DPIValue", "Parallel", "List", "Empty", "Progress", "Status", "Close", "Cancel", "Start"].map(name => [name, document.querySelector(`#convert${name}`)]));
+const batchElements = Object.fromEntries(["Button", "Panel", "Form", "Input", "Add", "Clear", "Count", "Format", "Compression", "FontRow", "FontMode", "Destination", "DPIRow", "DPI", "DPIValue", "List", "Empty", "Progress", "Status", "Close", "Cancel", "Start"].map(name => [name, document.querySelector(`#convert${name}`)]));
 const fontBinding = { font: null, choices: [], sequence: 0 };
 const fontBindingElements = Object.fromEntries(["Panel", "Form", "Title", "Name", "SourceRow", "Source", "File", "Hint", "Status", "Cancel", "Submit"].map(name => [name, document.querySelector(`#fontBinding${name}`)]));
 const resourceElements = Object.fromEntries(["ManageButton", "Panel", "Form", "Kind", "List", "Empty", "Reference", "ReferenceGroup", "Actions", "Add", "Preview", "Export", "Rename", "Replace", "Delete", "Locate", "Close", "Binding", "BindingActions", "Page", "Object", "Pick", "Bind", "Unbind", "Viewer", "Status", "File"].map(name => [name, document.querySelector(`#resource${name}`)]));
@@ -8340,7 +8340,7 @@ function renderBatchList() {
 }
 
 function updateBatchControls() {
-	for (const name of ["Add", "Clear", "Format", "Compression", "FontMode", "Destination", "DPI", "Parallel"]) batchElements[name].disabled = batch.running;
+	for (const name of ["Add", "Clear", "Format", "Compression", "FontMode", "Destination", "DPI"]) batchElements[name].disabled = batch.running;
 	batchElements.FontRow.hidden = !(batch.items.length ? batch.items : [null]).some(item => (item?.format || batchElements.Format.value) === "ofd");
 	batchElements.Compression.disabled ||= (batch.items.length ? batch.items : [null]).every(item => (item?.format || batchElements.Format.value) === "txt");
 	batchElements.Clear.disabled ||= !batch.items.length;
@@ -8562,7 +8562,7 @@ async function runBatch() {
 		const limits = nativeHost ? await nativeHost.call("batch", {}) : engineLimits();
 		const capacity = limits.parallelism;
 		const automatic = nativeHost ? capacity : Math.min(capacity, Math.max(1, Math.floor(limits.memoryBytes / (512 << 20))));
-		const parallel = Math.min(jobs.length, capacity, Number(batchElements.Parallel.value) || automatic);
+		const parallel = Math.min(jobs.length, automatic);
 		const workerMemory = (limits.memoryBytes || 0) / parallel;
 		let next = 0;
 		const run = async initial => {