stackblitz.com
StackBlitz | Instant Dev Environments | Click. Code. Done.
Last scanned Aug 2, 2026, 8:00 PM · 11 views
Overall score
Great
Summary
StackBlitz is the collaborative browser-based IDE for web developers. This website uses Astro behind Cloudflare CDN. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
StackBlitz is the collaborative browser-based IDE for web developers. StackBlitz eliminates time-consuming local configuration and lets developers spend more time building.
Top issues to fix
9 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
779 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
0 overall since Jul 26, 2026
- Overall
- 84
- SEO
- 70
- Security
- 70
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
StackBlitz is the collaborative browser-based IDE for web developers. StackBlitz eliminates time-consuming local configuration and lets developers spend more time building.
Meta tags
- Title
- StackBlitz | Instant Dev Environments | Click. Code. Done.
- Description
- StackBlitz is the collaborative browser-based IDE for web developers. StackBlitz eliminates time-consuming local configuration and lets developers spend more time building.
- Canonical
- https://stackblitz.com/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Cloudflare
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Amazon
- Subject
- stackblitz.com
- Valid from
- Mar 18, 2026
- Valid to
- Oct 1, 2026
- Days until expiry
- 60
- SAN domains
- stackblitz.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 2 · H2 0 · H3 3
Links
10 internal · 9 external · 19 broken
Images
13 total · 0 missing alt
Scripts / Styles
5 scripts · 5 stylesheets
JS / CSS size
4.2 KB · 10.2 KB
Page size
35.1 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Multiple H1 headings found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://stackblitz.com
- Final URL
- https://stackblitz.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 779 ms
- HTML size
- 35.1 KB
- Redirect chain
- https://stackblitz.com
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Frequently asked questions
- What technology does stackblitz.com use?
- stackblitz.com is built with Astro.
- Is stackblitz.com secure (HTTPS)?
- Yes. stackblitz.com uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 1, 2026.
- Who hosts stackblitz.com?
- Hosting provider information for stackblitz.com is not available yet.
- What is stackblitz.com's SEO score?
- stackblitz.com scored 70/100 for SEO in the latest analysis (fair).
- What is stackblitz.com's overall website score?
- stackblitz.com has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
- Has stackblitz.com's score changed over time?
- stackblitz.com's overall score has stayed steady at 84/100 since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card