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crontab.guru

Crontab.guru - The cron schedule expression generator

Last scanned Aug 6, 2026, 2:00 AM · 7 views

85

Overall score

Great

Summary

An easy to use editor for crontab schedules. This website is hosted on AWS. SEO is good (80/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.

An easy to use editor for crontab schedules.

United States
Hosted on AWS

Top issues to fix

7 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+1 more issue — details in the sections below.

80

SEO

3 issue(s) found

100

Performance

3 ms

65

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+6 overall since Jul 26, 2026

Overall
85
SEO
80
Security
65
Performance
100
Accessibility
100

Organization

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

An easy to use editor for crontab schedules.

Contact

Email, phone, and address published on this site's own pages.

Source: https://crontab.guru/contact

Meta tags

Title
Crontab.guru - The cron schedule expression generator
Description
An easy to use editor for crontab schedules.
Canonical
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider
AWS
CDN provider
CloudFront
IP address
18.239.111.17
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 18.239.111.17
  • 18.239.111.78
  • 18.239.111.45
  • 18.239.111.102
AAAA—
MX—
TXT
  • google-site-verification=ApkscAKxSfvwKHmkAyEm4ueTfvK-ioVxg10pJmFMgpc
  • google-site-verification=tVbLhKRd79oAWxp85RMbKW2xKV2wsBEUeR5UMNwSFtE
NS
  • ns-1739.awsdns-25.co.uk
  • ns-1205.awsdns-22.org
  • ns-180.awsdns-22.com
  • ns-909.awsdns-49.net
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
*.crontab.guru
Valid from
Jul 18, 2026
Valid to
Jan 31, 2027
Days until expiry
178
SAN domains
*.crontab.guru, crontab.guru

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 2 · H3 2

Links

3 internal · 10 external · 0 broken

Images

2 total · 0 missing alt

Scripts / Styles

6 scripts · 1 stylesheets

JS / CSS size

65.1 KB · 32.3 KB

Page size

16.3 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing canonical link
  • No structured data (JSON-LD) found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Careers

View careers page

This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.

Scan details

Requested URL
https://crontab.guru
Final URL
https://crontab.guru
HTTP status
200
HTTP version
HTTP/1.1
Response time
3 ms
HTML size
16.3 KB
Redirect chain
https://crontab.guru

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does crontab.guru use?
We did not detect any specific technologies for crontab.guru in the latest scan.
Is crontab.guru secure (HTTPS)?
Yes. crontab.guru uses TLS 1.3 with a certificate issued by Amazon, valid until Jan 31, 2027.
Who hosts crontab.guru?
crontab.guru is hosted on AWS, behind CloudFront CDN.
What is crontab.guru's SEO score?
crontab.guru scored 80/100 for SEO in the latest analysis (great).
What is crontab.guru's overall website score?
crontab.guru has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
Has crontab.guru's score changed over time?
crontab.guru's overall score has improved by 6 points (from 79 to 85) since Jul 26, 2026.
Is crontab.guru hiring?
crontab.guru has a careers page; check it directly for current openings.