keil.com
Keil Embedded Development Tools for Arm, Cortex-M, Cortex-R4, 8051, C166, and 251 processor families.
Last scanned Jul 26, 2026, 1:49 PM
Overall score
Fair
Summary
Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families. This website uses jQuery. SEO is fair (60/100) and accessibility is good (85/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.
Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families. This web site provides information about our embedded development tools, evaluation software, product updates, application notes, example code, and technical support.
Top issues to fix
14 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
+8 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
768 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families. This web site provides information about our embedded development tools, evaluation software, product updates, application notes, example code, and technical support.
Meta tags
- Title
- Keil Embedded Development Tools for Arm, Cortex-M, Cortex-R4, 8051, C166, and 251 processor families.
- Description
- Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families. This web site provides information about our embedded development tools, evaluation software, product updates, application notes, example code, and technical support.
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- 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
- GlobalSign nv-sa
- Subject
- www.keil.com
- Valid from
- Jan 7, 2026
- Valid to
- Feb 8, 2027
- Days until expiry
- 194
- SAN domains
- www.keil.com, www2.keil.com, keil.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
58 internal · 11 external · 20 broken
Images
4 total · 0 missing alt
Scripts / Styles
16 scripts · 6 stylesheets
JS / CSS size
1.9 KB · 0 B
Page size
25.1 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://keil.com
- Final URL
- https://www.keil.com/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 768 ms
- HTML size
- 25.1 KB
- Redirect chain
- https://keil.com → https://www.keil.com/
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Frequently asked questions
- What technology does keil.com use?
- keil.com is built with Bootstrap, jQuery.
- Is keil.com secure (HTTPS)?
- Yes. keil.com uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Feb 8, 2027.
- Who hosts keil.com?
- Hosting provider information for keil.com is not available yet.
- What is keil.com's SEO score?
- keil.com scored 60/100 for SEO in the latest analysis (fair).
- What is keil.com's overall website score?
- keil.com has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card