What technology does letsencrypt.org use?

We did not detect any specific technologies for letsencrypt.org in the latest scan.

Is letsencrypt.org secure (HTTPS)?

Yes. letsencrypt.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 4, 2026.

Who hosts letsencrypt.org?

Hosting provider information for letsencrypt.org is not available yet.

What is letsencrypt.org's SEO score?

letsencrypt.org scored 65/100 for SEO in the latest analysis (fair).

What is letsencrypt.org's overall website score?

letsencrypt.org has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.

Has letsencrypt.org's score changed over time?

letsencrypt.org's overall score has declined by 3 points (from 93 to 90) since Jul 15, 2026.

letsencrypt.org

Let's Encrypt

Last scanned Jul 29, 2026, 11:00 AM · 17 views

Overall score

Excellent

Summary

Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). SEO is fair (65/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our nonprofit work this year in our 2025 Annual Report.

Top issues to fix

7 issues found

Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

SEO

6 issue(s) found

100

Performance

64 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 15, 2026

Overall: 90
SEO: 65
Security: 100
Performance: 100
Accessibility: 100

Organization

Company details published in this site's own structured data.

GitHub LinkedIn

Meta tags

Title: Let's Encrypt
Description: Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our nonprofit work this year in our 2025 Annual Report.
Canonical
Language: en-US
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Netlify
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: Let's Encrypt
Subject: letsencrypt.org
Valid from: Jul 6, 2026
Valid to: Oct 4, 2026
Days until expiry: 67
SAN domains: cp.letsencrypt.org, cp.root-x1.letsencrypt.org, cps.letsencrypt.org, cps.root-x1.letsencrypt.org, lencr.org, letsencrypt.com, letsencrypt.org, www.lencr.org, www.letsencrypt.com, www.letsencrypt.org

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 2 · H2 6 · H3 9

Links

47 internal · 100 external · 20 broken

Images

93 total · 0 missing alt

Scripts / Styles

6 scripts · 2 stylesheets

JS / CSS size

1.0 KB · 0 B

Page size

88.1 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
Missing canonical link
Multiple H1 headings found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://letsencrypt.org
Final URL: https://letsencrypt.org
HTTP status: 200
HTTP version: HTTP/2
Response time: 63 ms
HTML size: 88.1 KB
Redirect chain: https://letsencrypt.org

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Frequently asked questions

What technology does letsencrypt.org use?: We did not detect any specific technologies for letsencrypt.org in the latest scan.
Is letsencrypt.org secure (HTTPS)?: Yes. letsencrypt.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 4, 2026.
Who hosts letsencrypt.org?: Hosting provider information for letsencrypt.org is not available yet.
What is letsencrypt.org's SEO score?: letsencrypt.org scored 65/100 for SEO in the latest analysis (fair).
What is letsencrypt.org's overall website score?: letsencrypt.org has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
Has letsencrypt.org's score changed over time?: letsencrypt.org's overall score has declined by 3 points (from 93 to 90) since Jul 15, 2026.