diff --git a/src/utils/index.ts b/src/utils/index.ts
index 8ff2d97..792cd07 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -67,6 +67,20 @@ export default class Utils {
         } else return "";
     }
 
+    /**
+     * 在线预览大小上限（字节）：日志大字段（请求体/响应）超过此值时隐藏"在线预览"、只保留"下载"。
+     * 浏览器 JSON 美化 + <pre> 渲染在数百 KB 起会卡顿，50KB 为体验无损的保守阈值。
+     */
+    public static readonly PREVIEW_MAX_BYTES = 50 * 1024;
+
+    /**
+     * 是否允许在线预览：有内容（size > 0）且字节数不超过阈值。
+     * size 为 null/undefined/0（未记录请求体、saveResponse=false、响应为空）→ 不可预览，仅下载。
+     */
+    public static canPreview(size?: number | null): boolean {
+        return size != null && size > 0 && size <= Utils.PREVIEW_MAX_BYTES;
+    }
+
     /**
      * 删除指定键
      */
diff --git a/src/views/oapilog/OapiLogDetailModal.vue b/src/views/oapilog/OapiLogDetailModal.vue
index d3c0f79..a032925 100644
--- a/src/views/oapilog/OapiLogDetailModal.vue
+++ b/src/views/oapilog/OapiLogDetailModal.vue
@@ -20,7 +20,13 @@
                 <pre class="json-pre">{{ formatJson(row?.requestParams) }}</pre>
             </FormItem>
             <FormItem label="响应结果：">
-                <pre class="json-pre">{{ formatJson(row?.responseData) }}</pre>
+                <template v-if="row?.id">
+                    <a href="javascript:;" class="download-link" @click.prevent="handleDownload">下载</a>
+                    <a v-if="canPreview" href="javascript:;" class="download-link" style="margin-left: 12px"
+                        @click.prevent="handlePreview">在线预览</a>
+                    <span v-if="sizeText" class="sub-text">（{{ sizeText }}）</span>
+                </template>
+                <span v-else>-</span>
             </FormItem>
             <FormItem label="创建时间：">
                 <span>{{ formatTime(row?.createTime) }}</span>
@@ -31,10 +37,18 @@
             <Button type="primary" @click="show = false">确定</Button>
         </template>
     </Modal>
+
+    <Modal v-model="previewVisible" title="响应结果预览" width="760" :mask-closable="true">
+        <pre class="json-pre">{{ previewText }}</pre>
+        <template #footer>
+            <Button @click="previewVisible = false">关闭</Button>
+        </template>
+    </Modal>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue';
+import { computed, ref } from 'vue';
+import useCurrentInstance from '@/utils/hook/useCurrentInstance';
 import Utils from '@/utils';
 
 interface Props {
@@ -81,6 +95,32 @@ function formatTime(val: any): string {
     if (!val) return '-';
     return Utils.dateFormat(val, 'yyyy-MM-dd HH:mm:ss');
 }
+
+const { $conf } = useCurrentInstance();
+
+const previewVisible = ref(false);
+const previewText = ref('');
+const canPreview = computed(() => Utils.canPreview(props.row?.responseSize));
+const sizeText = computed(() =>
+    props.row?.responseSize != null && props.row.responseSize > 0 ? Utils.getFileSize(props.row.responseSize) : ''
+);
+
+function handleDownload() {
+    if (!props.row?.id) return;
+    location.href = `${$conf.serviceHost}/api/oapilog/Download/${props.row.id}`;
+}
+
+async function handlePreview() {
+    if (!props.row?.id) return;
+    previewText.value = '加载中…';
+    previewVisible.value = true;
+    try {
+        const res = await fetch(`${$conf.serviceHost}/api/oapilog/Download/${props.row.id}`, { credentials: 'include' });
+        previewText.value = formatJson(await res.text());
+    } catch (e: any) {
+        previewText.value = '预览加载失败：' + (e?.message || e);
+    }
+}
 </script>
 
 <style lang="scss" scoped>
@@ -116,4 +156,32 @@ function formatTime(val: any): string {
         line-height: 1.6;
     }
 }
+
+.download-link {
+    color: #577afb;
+
+    &:hover {
+        color: #3d5afe;
+    }
+}
+
+.sub-text {
+    margin-left: 8px;
+    color: #999;
+    font-size: 12px;
+}
+
+.json-pre {
+    margin: 0;
+    padding: 10px 12px;
+    background: #f7f8fa;
+    border: 1px solid #e8eaec;
+    border-radius: 4px;
+    max-height: 420px;
+    overflow: auto;
+    white-space: pre-wrap;
+    word-break: break-all;
+    font-size: 13px;
+    line-height: 1.6;
+}
 </style>
diff --git a/src/views/oapilog/OapiLogList.vue b/src/views/oapilog/OapiLogList.vue
index ef070d3..891368d 100644
--- a/src/views/oapilog/OapiLogList.vue
+++ b/src/views/oapilog/OapiLogList.vue
@@ -151,6 +151,13 @@ const columns = [
         align: 'right',
         render: (h: any, { row }: any) => h('span', row.costTime != null ? `${row.costTime} ms` : '-'),
     },
+    {
+        title: '响应',
+        key: 'responseSize',
+        width: 90,
+        align: 'right',
+        render: (h: any, { row }: any) => h('span', row.responseSize != null && row.responseSize > 0 ? Utils.getFileSize(row.responseSize) : '-'),
+    },
     {
         title: '调用时间',
         key: 'createTime',
diff --git a/src/views/oplog/OperationLogDetailModal.vue b/src/views/oplog/OperationLogDetailModal.vue
index bb271d7..fe08de8 100644
--- a/src/views/oplog/OperationLogDetailModal.vue
+++ b/src/views/oplog/OperationLogDetailModal.vue
@@ -20,7 +20,12 @@
                 <pre class="json-pre">{{ formatJson(row?.requestParams) }}</pre>
             </FormItem>
             <FormItem label="数据：">
-                <a v-if="row?.id" href="javascript:;" class="download-link" @click.prevent="handleDownload">下载</a>
+                <template v-if="row?.id">
+                    <a href="javascript:;" class="download-link" @click.prevent="handleDownload">下载</a>
+                    <a v-if="canPreview" href="javascript:;" class="download-link" style="margin-left: 12px"
+                        @click.prevent="handlePreview">在线预览</a>
+                    <span v-if="sizeText" class="sub-text">（{{ sizeText }}）</span>
+                </template>
                 <span v-else>-</span>
             </FormItem>
             <FormItem label="创建时间：">
@@ -32,10 +37,17 @@
             <Button type="primary" @click="show = false">确定</Button>
         </template>
     </Modal>
+
+    <Modal v-model="previewVisible" title="响应结果预览" width="760" :mask-closable="true">
+        <pre class="json-pre">{{ previewText }}</pre>
+        <template #footer>
+            <Button @click="previewVisible = false">关闭</Button>
+        </template>
+    </Modal>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue';
+import { computed, ref } from 'vue';
 import useCurrentInstance from '@/utils/hook/useCurrentInstance';
 import Utils from '@/utils';
 
@@ -83,6 +95,25 @@ function handleDownload() {
     if (!props.row?.id) return;
     location.href = `${$conf.serviceHost}/api/oplog/Download/${props.row.id}`;
 }
+
+const previewVisible = ref(false);
+const previewText = ref('');
+const canPreview = computed(() => Utils.canPreview(props.row?.responseSize));
+const sizeText = computed(() =>
+    props.row?.responseSize != null && props.row.responseSize > 0 ? Utils.getFileSize(props.row.responseSize) : ''
+);
+
+async function handlePreview() {
+    if (!props.row?.id) return;
+    previewText.value = '加载中…';
+    previewVisible.value = true;
+    try {
+        const res = await fetch(`${$conf.serviceHost}/api/oplog/Download/${props.row.id}`, { credentials: 'include' });
+        previewText.value = formatJson(await res.text());
+    } catch (e: any) {
+        previewText.value = '预览加载失败：' + (e?.message || e);
+    }
+}
 </script>
 
 <style lang="scss" scoped>
@@ -126,4 +157,18 @@ function handleDownload() {
         }
     }
 }
+
+.json-pre {
+    margin: 0;
+    padding: 10px 12px;
+    background: #f7f8fa;
+    border: 1px solid #e8eaec;
+    border-radius: 4px;
+    max-height: 420px;
+    overflow: auto;
+    white-space: pre-wrap;
+    word-break: break-all;
+    font-size: 13px;
+    line-height: 1.6;
+}
 </style>
diff --git a/src/views/oplog/OperationLogList.vue b/src/views/oplog/OperationLogList.vue
index f249afb..4c542ee 100644
--- a/src/views/oplog/OperationLogList.vue
+++ b/src/views/oplog/OperationLogList.vue
@@ -152,6 +152,13 @@ const columns = [
         align: 'right',
         render: (h: any, { row }: any) => h('span', row.costTime != null ? `${row.costTime} ms` : '-'),
     },
+    {
+        title: '响应',
+        key: 'responseSize',
+        width: 90,
+        align: 'right',
+        render: (h: any, { row }: any) => h('span', row.responseSize != null && row.responseSize > 0 ? Utils.getFileSize(row.responseSize) : '-'),
+    },
     {
         title: '操作时间ed',
         key: 'createTime',
diff --git a/src/views/push/PushLog.vue b/src/views/push/PushLog.vue
index 6f88ae1..d3f72e3 100644
--- a/src/views/push/PushLog.vue
+++ b/src/views/push/PushLog.vue
@@ -156,6 +156,13 @@ const columns = [
         align: 'right',
         render: (h: any, { row }: any) => h('span', row.costMs != null ? `${row.costMs}` : '-'),
     },
+    {
+        title: '请求体',
+        key: 'payloadSize',
+        width: 100,
+        align: 'right',
+        render: (h: any, { row }: any) => h('span', row.payloadSize != null && row.payloadSize > 0 ? Utils.getFileSize(row.payloadSize) : '-'),
+    },
     {
         title: '操作',
         key: 'action',
diff --git a/src/views/push/PushLogDetailModal.vue b/src/views/push/PushLogDetailModal.vue
index 3bfa0a5..0824c1f 100644
--- a/src/views/push/PushLogDetailModal.vue
+++ b/src/views/push/PushLogDetailModal.vue
@@ -43,7 +43,12 @@
                 <span>{{ formatTime(row?.createdAt) }}</span>
             </FormItem>
             <FormItem label="请求体：">
-                <a v-if="row?.id" href="javascript:;" class="download-link" @click.prevent="handleDownload">下载请求体</a>
+                <template v-if="row?.id">
+                    <a href="javascript:;" class="download-link" @click.prevent="handleDownload">下载请求体</a>
+                    <a v-if="canPreview" href="javascript:;" class="download-link" style="margin-left: 12px"
+                        @click.prevent="handlePreview">在线预览</a>
+                    <span v-if="sizeText" class="sub-text">（{{ sizeText }}）</span>
+                </template>
                 <span v-else>-</span>
             </FormItem>
         </Form>
@@ -51,10 +56,17 @@
             <Button type="primary" @click="show = false">确定</Button>
         </template>
     </Modal>
+
+    <Modal v-model="previewVisible" title="请求体预览" width="760" :mask-closable="true">
+        <pre class="json-pre">{{ previewText }}</pre>
+        <template #footer>
+            <Button @click="previewVisible = false">关闭</Button>
+        </template>
+    </Modal>
 </template>
 
 <script lang="ts" setup>
-import { computed } from 'vue';
+import { computed, ref } from 'vue';
 import useCurrentInstance from '@/utils/hook/useCurrentInstance';
 import Utils from '@/utils';
 
@@ -87,11 +99,40 @@ function onVisibleChange(val: boolean) {
 
 const { $conf } = useCurrentInstance();
 
+const previewVisible = ref(false);
+const previewText = ref('');
+
+const canPreview = computed(() => Utils.canPreview(props.row?.payloadSize));
+const sizeText = computed(() =>
+    props.row?.payloadSize != null && props.row.payloadSize > 0 ? Utils.getFileSize(props.row.payloadSize) : ''
+);
+
 function handleDownload() {
     if (!props.row?.id) return;
     location.href = `${$conf.serviceHost}/api/push/Download/${props.row.id}`;
 }
 
+async function handlePreview() {
+    if (!props.row?.id) return;
+    previewText.value = '加载中…';
+    previewVisible.value = true;
+    try {
+        const res = await fetch(`${$conf.serviceHost}/api/push/Download/${props.row.id}`, { credentials: 'include' });
+        previewText.value = formatJson(await res.text());
+    } catch (e: any) {
+        previewText.value = '预览加载失败：' + (e?.message || e);
+    }
+}
+
+function formatJson(val: string): string {
+    if (!val) return '-';
+    try {
+        return JSON.stringify(JSON.parse(val), null, 2);
+    } catch {
+        return val;
+    }
+}
+
 function formatTime(val: any): string {
     if (!val) return '-';
     return Utils.dateFormat(val, 'yyyy-MM-dd HH:mm:ss');
@@ -135,4 +176,18 @@ function formatTime(val: any): string {
         }
     }
 }
+
+.json-pre {
+    margin: 0;
+    padding: 10px 12px;
+    background: #f7f8fa;
+    border: 1px solid #e8eaec;
+    border-radius: 4px;
+    max-height: 420px;
+    overflow: auto;
+    white-space: pre-wrap;
+    word-break: break-all;
+    font-size: 13px;
+    line-height: 1.6;
+}
 </style>