What technology does fler.cz use?

We did not detect any specific technologies for fler.cz in the latest scan.

Is fler.cz secure (HTTPS)?

Yes. fler.cz uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 28, 2026.

fler.cz is hosted on MASTER-AS - MasterDC s.r.o., CZ.

What is fler.cz's SEO score?

fler.cz scored 70/100 for SEO in the latest analysis (fair).

What is fler.cz's overall website score?

fler.cz has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.

fler.cz has a careers page; check it directly for current openings.

fler.cz

Fler - Umění a řemeslo | Fler.cz

Last scanned Jul 26, 2026, 5:18 AM

Overall score

Great

Summary

Na Fleru najdete více než dva miliony produktů od desetitisíců tvůrců. This website is hosted on MASTER-AS - MasterDC s.r.o., CZ. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.

Na Fleru najdete více než dva miliony produktů od desetitisíců tvůrců. Každý z nich je originál.

Hosted on MASTER-AS - MasterDC s.r.o., CZ

Top issues to fix

7 issues found · 3 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.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.

SEO

4 issue(s) found

100

Performance

731 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

Na Fleru najdete více než dva miliony produktů od desetitisíců tvůrců. Každý z nich je originál.

Contact

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

Source: https://www.fler.cz/about/contact

Meta tags

Title: Fler - Umění a řemeslo | Fler.cz
Description: Na Fleru najdete více než dva miliony produktů od desetitisíců tvůrců. Každý z nich je originál.
Canonical
Language: cs
Charset: utf-8
Viewport: width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: MASTER-AS - MasterDC s.r.o., CZ
CDN provider: —
IP address: 185.58.42.49
ASN: AS24971 (MASTER-AS - MasterDC s.r.o., CZ)

DNS records

Type	Value
A	185.58.42.49
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: fler.cz
Valid from: Jun 30, 2026
Valid to: Sep 28, 2026
Days until expiry: 64
SAN domains: api.fler.cz, fler.cz, www.fler.cz

Security headers

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

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

3 scripts · 0 stylesheets

JS / CSS size

363 B · 0 B

Page size

2.1 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 66
sitemap.xml: Found
URLs in sitemap: -1

SEO issues

Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags

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://fler.cz
Final URL: https://www.fler.cz/
HTTP status: 200
HTTP version: HTTP/2
Response time: 731 ms
HTML size: 2.1 KB
Redirect chain: https://fler.cz → https://www.fler.cz/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does fler.cz use?: We did not detect any specific technologies for fler.cz in the latest scan.
Is fler.cz secure (HTTPS)?: Yes. fler.cz uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 28, 2026.
Who hosts fler.cz?: fler.cz is hosted on MASTER-AS - MasterDC s.r.o., CZ.
What is fler.cz's SEO score?: fler.cz scored 70/100 for SEO in the latest analysis (fair).
What is fler.cz's overall website score?: fler.cz has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
Is fler.cz hiring?: fler.cz has a careers page; check it directly for current openings.

Top issues to fix

Organization

Contact

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Careers

Scan details

Related websites

Frequently asked questions