diff --git a/web/src/components/http-code-block.tsx b/web/src/components/http-code-block.tsx
index 6d35240..a6d4361 100644
--- a/web/src/components/http-code-block.tsx
+++ b/web/src/components/http-code-block.tsx
@@ -185,7 +185,7 @@ export function HttpPacketSyntax({
           className={cn("grid min-w-0", lineClassName, lineNumbers && "grid-cols-[2.25rem_minmax(0,1fr)]")}
         >
           {lineNumbers ? (
-            <span className="sticky left-0 self-stretch border-r bg-muted/20 px-1 text-right text-[11px] text-muted-foreground/50">
+            <span className="sticky left-0 self-stretch select-none border-r bg-muted/20 px-1 text-right text-[11px] text-muted-foreground/50">
               {index + 1}
             </span>
           ) : null}
diff --git a/web/src/components/repeater/repeater-text-pane.tsx b/web/src/components/repeater/repeater-text-pane.tsx
index 960353b..2ec5e78 100644
--- a/web/src/components/repeater/repeater-text-pane.tsx
+++ b/web/src/components/repeater/repeater-text-pane.tsx
@@ -10,6 +10,52 @@ import { HttpPacketSyntax } from "@/components/http-code-block";
 import { Textarea } from "@/components/ui/textarea";
 import { cn } from "@/lib/utils";
 
+function EditablePacket({
+  id,
+  value,
+  onChange,
+  onScroll,
+}: {
+  id: string;
+  value: string;
+  onChange: (value: string) => void;
+  onScroll: React.UIEventHandler<HTMLDivElement>;
+}) {
+  const editor = React.useRef<HTMLDivElement>(null);
+  const lastValue = React.useRef(value);
+
+  React.useEffect(() => {
+    if (!editor.current || lastValue.current === value) return;
+    if (editor.current.innerText !== value) {
+      editor.current.innerText = value;
+    }
+    lastValue.current = value;
+  }, [value]);
+
+  return (
+    <div
+      id={id}
+      ref={editor}
+      role="textbox"
+      aria-label="请求"
+      aria-multiline="true"
+      tabIndex={0}
+      contentEditable
+      suppressContentEditableWarning
+      spellCheck={false}
+      onInput={(event) => {
+        const next = event.currentTarget.innerText.replace(/\r\n?/g, "\n");
+        lastValue.current = next;
+        onChange(next);
+      }}
+      onScroll={onScroll}
+      className="h-full min-h-0 w-0 flex-1 overflow-auto whitespace-pre-wrap break-words rounded-none border-0 px-3 py-2 font-mono text-xs leading-5 outline-none md:text-xs"
+    >
+      <HttpPacketSyntax raw={value} lineNumbers={false} wrapLines />
+    </div>
+  );
+}
+
 export function RepeaterTextPane({
   id,
   label,
@@ -64,7 +110,7 @@ export function RepeaterTextPane({
         {toolbar}
         <CopyButton text={value} label={`复制${label}`} className={showClock ? "ml-0" : "ml-auto"} />
       </div>
-      <div className="relative flex min-h-0 flex-1 overflow-hidden rounded border border-input focus-within:border-ring">
+      <div className="group relative flex min-h-0 flex-1 overflow-hidden rounded border border-input focus-within:border-ring">
         <div
           aria-hidden="true"
           className="w-12 shrink-0 overflow-hidden border-r bg-muted/30 text-right text-muted-foreground"
@@ -73,7 +119,11 @@ export function RepeaterTextPane({
             {numbers}
           </pre>
         </div>
-        <Textarea
+        {syntaxHighlight && onChange ? (
+          <EditablePacket id={id} value={value} onChange={onChange} onScroll={(event) => {
+            if (gutter.current) gutter.current.style.transform = `translateY(-${event.currentTarget.scrollTop}px)`;
+          }} />
+        ) : <Textarea
           id={id}
           value={value}
           onChange={(event) => onChange?.(event.target.value)}
@@ -94,15 +144,15 @@ export function RepeaterTextPane({
           className={
             "field-sizing-fixed relative z-10 h-full max-h-none min-h-0 w-0 flex-1 resize-none rounded-none border-0 px-3 py-2 font-mono text-xs leading-5 focus-visible:ring-0 md:text-xs" +
             (syntaxHighlight
-              ? " bg-transparent text-transparent caret-foreground selection:bg-primary/20 selection:text-transparent placeholder:text-muted-foreground"
+              ? " bg-transparent text-transparent caret-foreground selection:bg-primary selection:text-primary-foreground placeholder:text-muted-foreground group-focus-within:text-foreground"
               : "")
           }
-        />
-        {syntaxHighlight ? (
+        />}
+        {syntaxHighlight && !onChange ? (
           <div
             ref={syntax}
             aria-hidden="true"
-            className="pointer-events-none absolute inset-y-0 right-0 left-12 overflow-hidden px-3 py-2 font-mono text-xs leading-5"
+            className="pointer-events-none absolute inset-y-0 right-0 left-12 overflow-hidden px-3 py-2 font-mono text-xs leading-5 group-focus-within:invisible"
           >
             <HttpPacketSyntax
               raw={value}