Is React bad for SEO?

Not by itself. A React app that renders in the browser (the default for Vite and most AI app builders) sends crawlers an almost-empty HTML file. Google can render the JavaScript later, on its own schedule; AI crawlers don't run it, so they see nothing. Server rendering or prerendering fixes that without changing what visitors see.

Sometimes, and slowly. Google can index a single-page app after it renders the JavaScript in a later pass, but pages can sit in "Discovered, currently not indexed" or show the wrong title. AI crawlers read only the raw HTML, so an SPA without prerendering is invisible to them. A free scan shows what each crawler gets from your app.

Do I need a developer or a rebuild?

No. If you can add a DNS record at your domain provider, you can set this up; the exact record appears in your dashboard. Switching to Next.js or server rendering is a rebuild. HadoSEO gives crawlers a finished page without changing how your app is built.

No. Crawlers get the same content your visitors see, just already rendered. Google's documentation says this (dynamic rendering) isn't cloaking as long as the content is the same.

Will it slow my app down?

No. People go straight to your live app. Only crawlers get the prerendered copy, served from cache.

How long until I see results?

AI crawlers get the full page on their very next visit. Google works on its own schedule: re-crawling and indexing usually take days to weeks, and you can speed it up by requesting indexing in Search Console. The crawl log shows each bot's visits as they happen.

How do updates and exclusions work?

Pages refresh daily by default, and a one-click purge from the dashboard refreshes them right away. Logged-in areas like /app/* can be excluded with Blocked Paths.

Does it fix robots.txt and sitemaps too?

Yes. You can serve a robots.txt and sitemap from HadoSEO if your builder doesn't.

Which hosts and domains does it work with?

Any host, as long as you use your own domain: builder hosting, Vercel, Netlify, Cloudflare Pages, Firebase and more. It doesn't work on a builder subdomain like *.lovable.app, because you can only edit DNS for a domain you own. Every builder lets you connect a custom domain; connect yours first, then add the record from your dashboard.

How is this different from Prerender.io?

Prerender.io is a rendering service you install as an integration. HadoSEO connects with one no-code DNS record and includes crawl analytics, so you also see which bots read which pages. See HadoSEO as a Prerender.io alternative at hadoseo.com/compare/hadoseo-vs-prerender-io.

[ for client-side apps ]

Your app looks great.
ChatGPT sees a blank page.

Apps built with Base44, Lovable, Bolt or React draw their pages in the browser, and AI crawlers never run that code. HadoSEO hands every crawler the finished page with one DNS record, no code.

Base44, Lovable, Bolt and React apps draw their pages in the browser. AI crawlers never run that code, so they see nothing.

Your visitors

acme-app.com

Acme · know why customers leave

Spot churn risk early.

Start free

1,240 words

What ChatGPT gets

acme-app.com

<div id="root"></div>

Nothing to read

0 words · no title

or start a 7-day free trial →

no codeany hostabout 5 minutes

Lovable #1 SEO Tool on Lovable Discover ✓Recommended by the Base44 team

[ same page · two readers ]

What your visitors see

acme-app.com

Acme · know why customers leave

Spot churn risk early and keep the customers you already won.

Start freeSee pricing

Your visitors · 1,240 words

What ChatGPT gets

acme-app.com

<div id="root"></div>

Nothing to read

0 words · no title

Example, from a sample app.

built for

Base44LovableBoltReplit

React

Vue

Angular

Vite

Trusted by 1,500+ sites

[ why it happens ]

Built in the browser. Blank to bots.

→

crawler

A crawler asks for your page.

GPTBot, ClaudeBot, PerplexityBot or Googlebot requests /pricing.

→

Your host sends an empty shell.

The HTML has a placeholder title like "App" and <div id="root"></div>. The real content lives in the JavaScript.

0 words

The crawler leaves with nothing.

AI crawlers don't run JavaScript, so they read zero words. Google queues the page to render later, which can take days.

"None of the major AI crawlers currently render JavaScript."

Vercel · The rise of the AI crawler · Dec 2024

[ sound familiar? ]

Four signs crawlers can't read your app.

Each one is the same problem showing up in a different tool: the crawler got an empty page.

01 · seen in search console

search.google.com

Why pages aren't indexed38 pages

acme-app.com/pricing/pricingDiscovered – currently not indexedDiscovered – not indexed

acme-app.com/features/alerts/features/alertsDiscovered – currently not indexedDiscovered – not indexed

acme-app.com/blog/churn-signals/blog/churn-signalsDiscovered – currently not indexedDiscovered – not indexed

38 pages found. None of them read.

Pages stuck in "Discovered, not indexed".

Google found the address, fetched an empty shell, and put the page at the back of the queue.

02 · seen in google

google.com

site:acme-app.com

Aacme-app.com

Acme · know why customers leaveONLY RESULT

One page in Google. The rest aren't.

Only your homepage is indexed.

Your menu links are added by JavaScript, so the crawler never finds the other pages.

03 · seen in chatgpt

chatgpt.com

best tool to predict SaaS churn

ChatGPT · searched 6 sites

For most SaaS teams, a few established tools come up again and again, along with community threads comparing them…

SourcesrGC

A full answer, and acme-app.com isn't in it.

You're missing from ChatGPT and Perplexity.

AI crawlers don't run JavaScript. They can't quote a page that reads as empty.

04 · seen in slack

app.slack.com

# launch

You 10:42 AM

We just launched: acme-app.com

acme-app.com

App

No description

no image

Your launch link, with the template's title.

Link previews are broken on X, Slack and LinkedIn.

Your title and image are set by JavaScript, and preview bots never run it. They show the template default.

Not sure which ones you have? The free scan shows what each crawler gets from your app, page by page.

Run free scan

[ the fix ]

Visitors get your app. Crawlers get the page.

HadoSEO sits in front of your site. People go straight to your live app, untouched. Crawlers get a finished copy of the same page, with every word, link, title and preview tag.

readable by✓Google✓ChatGPT✓Claude✓Perplexity✓Gemini✓Bing

[ request routing ]

yourdomain.com

human→your live appunchanged

crawler→HadoSEO render→cached HTML200 · cached · 38ms

yourdomain.com

↓

human → your live app · unchanged

crawler → HadoSEO render → cached HTML 200

No rebuild. No migrating to Next.js, no server to run, nothing to change in your builder.No rebuild or Next.js migration
The same content, not a different site. Crawlers see exactly what visitors see, so it's not cloaking.The same content visitors see, so it's not cloaking
Always fresh. Pages refresh daily by default, or right away when you purge from the dashboard.Pages refresh daily and on purge
Fast for bots. Cached pages are served from the edge in under 50ms.Served from cache in under 50ms

[ the same four places, after HadoSEO ]

01 · search console

search.google.com

Page indexing38 pages

/pricingIndexed

/features/alertsIndexed

/blog/churn-signalsIndexed

✓Pages leave the queue

02 · google

google.com

site:acme-app.com

acme-app.com › pricing

Pricing · Acme

acme-app.com › blog

5 churn signals to watch · Acme

✓Every page can be found

03 · chatgpt

chatgpt.com

best tool to predict SaaS churn

ChatGPT · searched 6 sites

…tools like Acme flag at-risk accounts from usage data acme-app.com

✓Readable, so it can be quoted

04 · slack

app.slack.com

You 10:42 AM launched: acme-app.com

acme-app.com

Acme · know why customers leave

Spot churn risk early.

✓Your title, your image

[ spa seo ]

Single-page app SEO, without a rebuild.

SPA SEO comes down to one question: what is in the HTML before JavaScript runs? A single-page application built with React, Vue, Angular or an AI app builder ships a near-empty shell and draws the page in the browser. Google renders it later, on its own schedule. AI crawlers don't render it at all.

rebuild

Server-side rendering

Move the app to Next.js or another server-rendering framework. Crawlers get HTML, after a rewrite.

rebuild

Static generation

Build every page to HTML at deploy time. Works for fixed pages; dynamic routes need extra work.

no rebuild

Prerendering

Keep the app. Crawlers get a rendered copy of each page from cache; visitors get the live app.

See how the prerendering service works, or go straight to the guide for your builder: Lovable SEO or Base44 SEO.

[ setup ]

One DNS record. About five minutes.

01

Add your domain.

Sign up and enter your app's custom domain.

02

Paste one record.

Copy the DNS record from your dashboard into your domain provider (GoDaddy, Namecheap, Cloudflare or any other).

03

Crawlers get full pages.

The next GPTBot or Googlebot visit gets the finished page. Watch it happen in your crawl log.

your domain provider · DNS

DNS recordsyourdomain.com

TypeNameValueTTL

MX@mail.protection.example1h

A@137.66.32.95Auto

TXT@v=spf1 include:example …1h

✓Saved. Crawlers start getting full pages.

~5 minsetup, one DNS record99.9%uptime

works wherever your app is hostedVercelNetlifyCloudflare PagesFirebaseRenderany host with a custom domain

You'll need your own domain (like yourapp.com), not a builder subdomain.

On Cloudflare already? Use our Cloudflare Worker instead of the DNS record →

[ by builder ]

Built with one of these?

[ from builders ]

Shipped. Then found.

4.4 on Trustpilot · 10 reviews

“After a few edits guided by Kento, we were able to re-index our website within an hour! Excited to see the SEO results rolling in.”

Samed

Owner · Talya Roofing

“Hado SEO took our Lovable site from invisible to discoverable fast. Easy setup, clear fixes, great social previews, and amazing support.”

Nyah

CEO · unlock.luxe

“A professional, well-thought tool that brings real SEO improvements to Lovable projects. Efficient setup and amazing results. Highly recommended.”

Jimmy

Lovable Expert · Upwork

“My Lovable website only indexed the home page, not my blogs. HadoSEO solved it instantly. Really happy with the price and service.”

Justin

Agency Owner · Nieuwblik

[ pricing ]

Start with one app.

Starter

$19/month

1 site · 10,000 renders/month

Full HTML served to every crawler
Titles, descriptions and preview images fixed
Crawl analytics by page and bot
Per-page SEO checks

Start 7-day free trial

Every plan includes bot detection, caching and HTTPS.

Need more than one app? Pro is $49 for 3 sites, with redirects and custom cache rules. See all plans →

Cancel any time. You keep access until the period ends.
Add sites as you go
Change plans any time

[ questions ]

Client-side apps, answered.

[ free scan ]

Your app looks great.
ChatGPT sees a blank page.