The Plain Fetch viewer

In short

The viewer requests a URL the way a plain-fetch agent does: no JavaScript, one request for HTML, one for markdown, one for llms.txt and one for a path that should not exist. It shows the initial HTML on the left, the readable text on the right, and seven flags underneath.

Pre-loaded with www.wikipedia.org, read 4 November 2026. Type any public URL to run your own.

GET https://bilibili.com/ answered 200 with text/html, 126 KB, 2 redirects, read 15 November 2026, 06:45 UTC. Final URL: https://www.bilibili.com/zh-Hans.

Permalink: /viewer/?url=https://bilibili.com/

A plain-fetch client does not get the heading: 1 of 6 checks found.

Initial HTML what a plain fetch receives

<!DOCTYPE html>
<html  lang="zh-CN">
  
<head>
<meta charset="UTF-8" />
<title>bilibili
</title>
<meta
      name="description"
      content="哔哩哔哩（bilibili.com)是国内知名的视频弹幕网站，这里有及时的动漫新番，活跃的ACG氛围，有创意的Up主。大家可以在这里找到许多欢乐。"
    />
[... 2 more head elements folded ...]
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
[... 3 more head elements folded ...]
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
[... 4 more head elements folded ...]
<link rel="canonical" href="https://www.bilibili.com/" />
<link rel="alternate" media="only screen and (max-width: 640px)" href="https://m.bilibili.com" />
[... 15 more head elements folded ...]
</head>
  
<body style="background-color: var(--bg3)">
    
<div class="browser-tip">
</div>
    
<script>[... 413 characters folded ...]
</script>
    
<div id="app"><!--[--><!--[-->
<div class="bili-video-card__wrap __scale-wrap" data-v-345986cd><a href="//cm.bilibili.com" data-target-url="**" data-v-345986cd></a>
</div><!----><!--]-->
<div class="bili-feed4"><!--[-->
<div class="bili-header bili-header--large">
<div class="bili-header__menu is-zh bili-header__bar" data-v-3380389d>
<div class="left-entry is-zh menu-left" data-v-ec16de5b data-v-3380389d><!---->
<div class="left-entry-main" data-v-ec16de5b><!--[--><!--[-->
<div class="v-popover-wrap left-entry__item home-page-entry" data-v-ec16de5b><!--[--><a href="//www.bilibili.com/zh-Hans" class="left-entry__item-trigger" data-v-ec16de5b>
<svg width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg" class="trigger-icon" data-v-ec16de5b>[... 1,164 characters folded ...]
</svg><span class="trigger-text" data-v-ec16de5b>首页</span><!----></a><!--]--><!---->
</div><!----><!--]--><!--[-->
<div class="v-popover-wrap left-entry__item" data-v-ec16de5b><!--[--><a target="_blank" class="left-entry__item-trigger" data-v-ec16de5b>
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" class="trigger-icon" data-v-ec16de5b>[... 1,109 characters folded ...]
</svg><span class="trigger-text" data-v-ec16de5b>下载客户端</span><!----></a><!--]--><!---->
</div><!----><!--]--><!--]--><!---->
</div>
</div>
<div class="center-search-container menu-center" data-v-3380389d>
<div class="center-search__bar">
<form id="nav-searchform" class="" style="border-radius:8px 8px 8px 8px;">
<div class="nav-search-content"><input class="nav-search-input" type="text" autocomplete="off" accesskey="s" maxlength="100" x-webkit-speech x-webkit-grammar="builtin:translate" value placeholder title>
<div class="nav-search-clean">
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">[... 749 characters folded ...]
</svg>
</div>
</div>
<div class="nav-search-btn">
<svg width="17" height="17" viewBox="0 0 17 17" fill="none" xmlns="http://www.w3.org/2000/svg">[... 681 characters folded ...]
</svg>
</div>
</form>
<div class="search-panel nav-search-panel" style="display:none;"><!----><!----><!---->
</div>
</div>
</div>
<div class="right-entry is-zh menu-right" data-v-599fe3bc data-v-3380389d>
<div class="right-entry__loading" data-v-599fe3bc>
</div>
</div>
</div>
<div class="bili-header__banner"><picture class="v-img banner-img" id="bili-header-banner-img"><!--[--><!--[--><source srcset="//i0.hdslb.com/bfs/app/58a4e1f9a4ad2fc524858e317a8b3e0c4c34f512.jpg@3840w_360h_1c.avif" type="image/avif"><!--]--><!--[--><source srcset="//i0.hdslb.com/bfs/app/58a4e1f9a4ad2fc524858e317a8b3e0c4c34f512.jpg@3840w_360h_1c.webp" type="image/webp"><!--]--><!--[--><img src="//i0.hdslb.com/bfs/app/58a4e1f9a4ad2fc524858e317a8b3e0c4c34f512.jpg@3840w_360h_1c" alt loading="eager" onload="typeof window.headerBannerLoaded === &#39;function&#39; &amp;&amp; window.headerBannerLoaded();wind [... 1097 characters folded ...]><!--]--><!--]--></picture><!---->
<div class="header-banner__inner"><!----><!---->
</div>
<div class="taper-line">
</div><!---->
</div><!----><!---->
</div><!----><!----><!----><!--]--><!---->
<main class="bili-feed4-layout">
<div class="fixed-channel-shim">
</div>
<div class="feed2">
<div class="recommended-container_overseas">
<div class="container is-version8"><!--[-->
<div class="feed-card">
<div class="bili-feed-card">
<div class="bili-video-card is-rcmd" style="--cover-radio:56.25%;"><!----><!---->
<div class="bili-video-card__wrap"><!----><a class="bili-video-card__image--link" href="https://www.bilibili.com/zh-Hans/video/BV1WMWT6WEqr" target="_blank">
<div class="bili-video-card__image">
<div class="bili-video-card__image--wrap"><!----><picture class="v-img bili-video-card__cover"><!--[--><!--[--><source srcset="//i2.hdslb.com/bfs/archive/617ead4c4efcb46e443160544d3de411fd9d8428.jpg@672w_378h_1c_!web-home-common-cover.avif" type="image/avif"><!--]--><!--[--><source srcset="//i2.hdslb.com/bfs/archive/617ead4c4efcb46e443160544d3de411fd9d8428.jpg@672w_378h_1c_!web-home-common-cover.webp" type="image/webp"><!--]--><!--[--><img src="//i2.hdslb.com/bfs/archive/617ead4c4efcb46e443160544d3de411fd9d8428.jpg@672w_378h_1c_!web-home-common-cover" alt="" loading="eager" onload=";firstVideoCardImgLoaded();if (!this.__BMG_IMG_LOAD_HANDLED__) { this. [... 569 characters folded ...]><!--]--><!--]--></picture>
</div>
<div class="bili-video-card__mask">
<div class="bili-video-card__stats">
<div class="bili-video-card__stats--left"><!--[--><span class="bili-video-card__stats--item">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" fill="#ffffff" class="bili-video-card__stats--icon"><!--[--><!--]-->
</svg><span class="bili-video-card__stats--text">167.3万</span></span><!--]--><span class="bili-video-card__stats--item">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" fill="#ffffff" class="bili-video-card__stats--icon"><!--[--><!--]-->
</svg><span class="bili-video-card__stats--text">276</span></span>
</div><span class="bili-video-card__stats__duration">01:09</span>
</div>
</div>
</div></a>
<div style="" class="bili-video-card__info">
<div class="bili-video-card__info--right"><!--[-->
<div class="bili-video-card__info--no-interest" style="display:none;">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" class="bili-video-card__info--no-interest--icon" fill="currentColor"><!--[--><!--]-->
</svg>
</div><!----><!--]-->
<h3 class="bili-video-card__info--tit" title="假如摩擦力突然消失，会怎么样？"><a href="https://www.bilibili.com/zh-Hans/video/BV1WMWT6WEqr" target="_blank">假如摩擦力突然消失，会怎么样？</a>
</h3>
<div class="bili-video-card__info--bottom"><!--[--><!----><a class="bili-video-card__info--owner" href="//space.bilibili.com/zh-Hans/3747574001438210" target="_blank">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" fill="currentColor" class="bili-video-card__info--owner__up"><!--[--><!--]-->
</svg><span class="bili-video-card__info--author" title="假如实验室WhatIf">假如实验室WhatIf</span><span class="bili-video-card__info--date">· 11月10日</span></a><!--]-->
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="feed-card">
<div class="bili-feed-card">
<div class="bili-video-card is-rcmd" style="--cover-radio:56.25%;"><!----><!---->
<div class="bili-video-card__wrap"><!----><a class="bili-video-card__image--link" href="https://www.bilibili.com/zh-Hans/video/BV15pWq6xE7w" target="_blank">
<div class="bili-video-card__image">
<div class="bili-video-card__image--wrap"><!----><picture class="v-img bili-video-card__cover"><!--[--><!--[--><source srcset="//i1.hdslb.com/bfs/archive/545df0c053dff81cfc3a04a9290da5123ffcb154.jpg@672w_378h_1c_!web-home-common-cover.avif" type="image/avif"><!--]--><!--[--><source srcset="//i1.hdslb.com/bfs/archive/545df0c053dff81cfc3a04a9290da5123ffcb154.jpg@672w_378h_1c_!web-home-common-cover.webp" type="image/webp"><!--]--><!--[--><img src="//i1.hdslb.com/bfs/archive/545df0c053dff81cfc3a04a9290da5123ffcb154.jpg@672w_378h_1c_!web-home-common-cover" alt="" loading="eager" onload="fsrCb();firstVideoCardImgLoaded();if (!this.__BMG_IMG_LOAD_HANDLED__)  [... 576 characters folded ...]><!--]--><!--]--></picture>
</div>
<div class="bili-video-card__mask">
<div class="bili-video-card__stats">
<div class="bili-video-card__stats--left"><!--[--><span class="bili-video-card__stats--item">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" fill="#ffffff" class="bili-video-card__stats--icon"><!--[--><!--]-->
</svg><span class="bili-video-card__stats--text">79.9万</span></span><!--]--><span class="bili-video-card__stats--item">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24" width="24" height="24" fill="#ffffff" class="bili-video-card__stats--icon"><!--[--><!--]-->
</svg><span class="bili-video-card__stats--text">352</span></span>
</div><span class="bili-video-card__stats__duration">00:12</span>
</div>
</div>
</div></a>
<div style="" class="bili-video-card__info">
<div class="bili-video-card__info--right"><!--[-->

Shown with 30 long blocks (scripts, styles, long tags) folded into a marker that says how many characters they hide; line breaks added before block tags because the source is minified; the pane stops after the first 200 words; the page is 126 KB.

Reading view the text a plain-fetch client can extract

title: bilibili

No H1 in the initial HTML

首页下载客户端 167.3万 276 01:09 假如摩擦力突然消失，会怎么样？假如实验室WhatIf· 11月10日 79.9万 352 00:12 好久不见还能认出我吗？柯洁· 2天前 7.1万 305 08:18 三少回归有妖气解封？三九抄袭案反转：新概念杀疯，今何在邀江南《今日说法》隔空互冲？网络小说排行榜· 20小时前 6.3万 117 07:55 这绝对是鸣潮到目前为止最好的活动！一个视频带你看懂鸣潮新版本galgame全剧情深度解析！隐紫大人不会吐槽· 19小时前 34.1万 477 07:52 好清晰的摄像头！小四AQA· 2天前 46.4万 219 01:13 原神7.2剧情速通版魔界设计师· 2天前 13.1万 311 03:17 “不要小看开拓与欢愉的羁绊啊，魂淡！” 须賀圭介· 2天前 62.5万 695 06:13 我循声守卫害怕的狗XGGGGGGGG258· 11月8日 7.1万 297 05:33 关于奶牛猫李宝库小时候的一些视频合集之《奶牛鸟·起源》平于晏· 昨天 13:33 13.8万 455 28:45 EPIC创始人：AI做的游戏是否出色仍然取决于开发者 STN工作室· 昨天 11:00

66 words in all.

1 found, 3 missing, 3 notes, from 7 checks run

H1Missing
200 wordsNote
llms.txtNote
MarkdownMissing
Missing pathFound
JSON-LDMissing
OpenAPINote

What a plain fetch found on bilibili.com
Check	Result	Detail
H1 in the initial HTML	Missing no H1	A plain-fetch client finds no page heading in the bytes it receives.
First 200 words in the initial HTML	Note 66 words	Only 66 words of visible text arrive in the initial HTML. That is a short page, not a shell.
llms.txt present and linked	Note present, not linked	10994 bytes, 52 links. Structure grade A (6 of 6). Nothing on the home page points to it. Ora's lab found 86 percent of llms.txt fetches arrived through a link.
Markdown on request	Missing 200 text/html	Accept: text/markdown returned 200 with text/html; charset=utf-8. The server ignores the header.
Status of a made-up path	Found 404	/agent-ready-html-missing-path-check returned 404: a real status code for a missing page.
JSON-LD types	Missing none	No JSON-LD block on the home page. Ora's lab found it made no difference when the answer was already in the HTML; Google says it is not needed for AI features.
OpenAPI link	Note none on the home page	No OpenAPI link on the home page. It matters only for a site that ships an API.

Run the full check

The viewer read one page with four requests. The full check we recommend next is Ora's scan. Its Access layer runs 42 checks worth 30 of its 100 points, among them content without JavaScript, bot detection, llms.txt, markdown on request, JSON-LD and the sitemap (Ora's check catalogue, contract 1.38.0, read 5 November 2026). Open Ora's report for bilibili.com.

Limits: Ora reads public URLs only, says two runs of one scan land within a couple of points without publishing repeat-scan data, and keeps the product that fixes what it finds behind a waitlist. Cloudflare's scanner at isitagentready.com is a quick free alternative, and Mintlify's score covers documentation.

What the viewer does

It sends four plain GET requests with the user agent Mozilla/5.0 (compatible; agent-readiness-crawl/1.0): the URL itself, the same URL with Accept: text/markdown, /llms.txt on the same host, and a made-up path at the root. It runs no JavaScript. The left pane is the first bytes of the HTML as text, with long scripts and styles folded into a marker that says how many characters they hide. The H1 and the first 200 words of visible text are marked in both panes. The flags under the panes say what the four responses added up to.

Limits

Ten seconds for all four requests together, 1.5 MB read from the home page, at most five redirects, each one checked again.
http and https only, default ports only. Private, local and internal addresses and names are refused.
Ten runs per address per minute. The counter lives in memory on the edge function, so it is per instance rather than global. Past ten you get a 429 with a Retry-After header.
Results are cached for 24 hours by the response headers. Nothing is written to a database: the viewer keeps the first 200 words and the extracted fields for the length of the request and keeps no page body beyond that.

What it does not tell you

A plain fetch from this server is not a real agent. Bot protection weighs the source address more than the user agent, so a page that answers 200 here can still refuse an agent, and the reverse. Ora's lab found (2026-10-19) that returning 403 to agent user agents and hiding the answer in JavaScript were the only two of 19 configurations that stopped retrieval; the viewer can see the second, and can only hint at the first. The initial HTML reference covers both. The server logs and the published crawler address ranges settle the first.

The seven flags

H1 in the initial HTML: Whether the HTML the server sends already contains an H1. It is the cheapest sign that the page does not depend on scripts to say what it is.
First 200 words in the initial HTML: Whether at least 200 words of visible text arrive in the initial HTML. Under 40 words with an app root element is flagged as a JavaScript shell.
llms.txt present and linked: Whether /llms.txt answers with a plain-text file, whether the home page links it (an anchor, a link element or a Link header), and the structure grade the index uses.
Markdown on request: Whether a request with Accept: text/markdown comes back as text/markdown. Cloudflare Radar found 3.9 percent of scanned top sites passing this at its April 2026 launch.
Status of a made-up path: Whether a path that should not exist returns 404 or 410. A 200 is a soft 404 and reads as a live page.
JSON-LD types: The schema.org types found in JSON-LD blocks on the page. Ora's lab found JSON-LD made no difference when the answer was already in the HTML.
OpenAPI link: Whether the page links an OpenAPI file, by an anchor or a service-desc link relation. It matters only for a site that ships an API.

Sources

Ora: AgentReady launch post (Ora's lab findings) https://ora.ai/blog/agentready-launch, read 4 November 2026
Ora check catalogue, contract 1.38.0 (132 checks, 42 in the Access layer) https://ora.ai/api/checks, read 5 November 2026
Ora home page (the fixing product is behind a waitlist) https://ora.ai/, read 5 November 2026
Ora: Introducing Deep Scan (repeat scans) https://ora.ai/blog/introducing-deep-scan, read 5 November 2026
Ora llms.txt (public URLs only) https://ora.ai/llms.txt, read 5 November 2026
Vercel: Make your site readable by AI agents https://vercel.com/kb/guide/make-your-site-readable-by-ai-agents, read 4 November 2026
llms.txt proposal (llmstxt.org) https://llmstxt.org/, read 4 November 2026

Last reviewed 5 November 2026