Check DNS, Urls + Redirects, Certificates and Content of your Website
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Hall of Fame -
A+
and
A
Short FAQ
show
How do I use that tool?
Insert a valid domain name, without http:// or https://, without www:
yourdomain.com
If you check a domain name, non-www and www (if defined), http and https is checked.
Add a port or / and a file and path:
yourdomain.com:5001
yourdomain.com/subfolder-of-your-domain
yourdomain.com/subfolder/file-to-check.html
yourdomain.com:5001/subfolder/file-to-check.html
Insert a valid / public ipv4- or ipv6-address:
1.1.1.1
2a01:238:301b::1226
ipv6 with port:
[2a01:238:301b::1226]:443
If you check an ip address, you may add your domain name in the "hostname" field.
That's helpful if your domain has an ipv4-address and if you want to add an ipv6-address.
You can check your ipv6-address without having an AAAA-record in your DNS.
Checking ip addresses no DNS-checks are done -> that's very short.
If you check a port, normally one check (http or https) is wrong. Ignore that wrong result. Typical programs use only one protocol with one port. There are some programs (Ookla Speedtest, VestaCP, WebMin) who are able to use one port with both protocols http/https.
Insert a valid
Internationalized Domain Name
(IDN)
First click: The IDN is transformed to the xn-- version.
Second click: The check starts with the xn-- version.
The result of an IDN-check shows both versions.
Sometimes special code parts are updated. That requires, that no check is running. So new jobs are added to the
Queue
, but not executed. Wait some minutes.
QR Code of your domain name required? Double-click in the text box.
Which Grade should I have?
If it is your first certificate: Grade
B
without HSTS and without Cookie errors.
If your certificate renew works: Grade
A
with HSTS. If your certificate renew
really works
, you may add the domain to the Google Preload list. Then browsers use always https to connect your domain. That's Grade
A+
.
Short:
Fatal:
Domain doesn't end with a public suffix, isn't registered, private ip addresses are defined (
Z
,
U
,
Y
).
Port 80 and port 443 must answer, no TCP-errors (
V
,
W
), Timeouts (
T
), Server Errors (
S
)
No global SSL error (
P
), http over port 443 or https over port 80 (
Q
)
All certificates are valid (no
N
), no misconfiguration (
M
), no wrong redirects (
R
)
No old/weak connection (
O
), no Loop (
L
), no different ip addresses of the same domain name with different answers (
K
)
No mixed content / missing resources, errors in svg definitions etc. (
I
)
If you have one of these errors, users may have problems using your site.
Better:
No http result (
H
)
Correct redirects (no
F
,
E
,
D
)
If non-www + www is defined: One destination (no
C
)
No cookie errors, all https cookies secure, SameSite-Attribute (
B
without warnings)
If HSTS is defined: No HSTS-parse errors
If you use HSTS and your certificate is invalid (wrong domain name, expired, revoked), visitors can't create an exception in their browser. So it's impossible to visit your site. HSTS requires an
always valid certificate
, so you shouldn't add HSTS if you don't know your certificate renew works.
But if the certificate renew works, HSTS + Preload is an amazing feature. Browsers connect your domain
only
via https, so it's impossible to add cookies via http.
Check
Find
hide
skip EDNS-Check
skip Content-Check
check links
Find
∑
A+
Top + Preload
595
A
Top
2318
B
no HSTS, unsecure Cookies
10436
C
Many http status 200
5748
D
redir http ⇒ http
581
E
http ⇒ https other domain
5464
F
https ⇒ http
864
H
result http
6670
I
Content problems
16918
J
General Configuration
1896
K
ip addresses with diff. status
159
L
Loop - fatal
2965
M
Misconfiguration
5293
N
Certificate not trusted
66365
O
old connection
2237
P
Tls-Protocol error
3808
Q
http sent over port 443
4398
R
redir not existing domain
832
S
Server error (500)
7928
T
Timeout
35685
U
Unknown - no dns / wrong IDN
11769
V
Connect failure
32183
W
wrong Web-Response
7046
X
DNS-problem Nameserver
41555
Y
private IP
5427
Z
private, tld not in PSL
3331
⁕
running jobs
1
⁂
Queue
0
#
error
0
started
2018-10-27
1,307 days
Domains
216.12 / day
282,473
last 24 h
Dom./Checks
227/271
Checks
323.75 / day
423,143
Current
miirrk.vesy.kz
⁕
fabrika.vesy.kz
N
keli.kz
Y
flower-words.com
V
demo.lomin.ai
U
himeji-test.fu-hot-web.jp
X
erp.syatgroup.com
U
symatgroup.com
V
spiritmatterstalk.com
X
stagecms.gmastore.ph
T
revil-cheats.xyz
T
mail.jetsomax.com
B
mail.singtaonewscorp.com
X
mail.jetsomax.net
B
ctosnextcloud.goip.de
V
cuahangquany.net
N
recoverlogpas.xyz
V
marsolaisphoto.com
X
getcustomers.cloud
N
delphinium.cloud
C-
babs.nl
X
dreamstreammachine.org
N
dierenweide-woubrugge.nl
X
noresponder.dgae.unam.mx
T
samplesplus.co.nz
J
navy.ro
I
forumulsecuritatiimaritime.ro
Q
speedtest.tecomunica.com.ni:8080
X
jtcmotorsports.com
M
donaciones.radiomaria.cl
V
Good
hp-67.com
A+
server-daten.de
A+
fordon-f5.infobricfleet.com
A
mail.jetsomax.com
B
mail.jetsomax.net
B
e2performance.com
B
login.infobricfleet.com
B
niagara.tech
B
app.elimedi.com
B
delphinium.cloud
C
zuko.org
C
sokratapp.ru
C
iotsrv.xyz
C
mobiletop.co.uk
C
fixbee.ro
C
voita.studio
E
noptel.com
E
taturbo.com
E
escuelaeas.ar
E
reefcrm.com
F
electrodh.com
H
ronsard.bcinfo.fr
H
curl.lotnisko-parkingi.pl
H
navy.ro
I
google.com
I
mpt.com.mm
I
google.com.br
I
swread2ride.com
I
ontopup.com
I
hardimanlab.org
I
Worst
06d8d904d5584346f68a2fa754227ec4
Z
ipv6
Z
dns
Z
keli.kz
Y
private-hot.com
Y
miirrk.vesy.kz
X
himeji-test.fu-hot-web.jp
X
spiritmatterstalk.com
X
mail.singtaonewscorp.com
X
marsolaisphoto.com
X
babs.nl
X
dierenweide-woubrugge.nl
X
speedtest.tecomunica.com.ni:8080
X
speedtest.tecomunica.com.ni
X
ml.oombe.com:31400
X
modelsearch.io
X
promote.bhphotovideo.com
X
gis.lubashivska-gromada.gov.ua
X
reylos.servebeer.com
X
staging.nexgen365.com
X
mail.cslentz.com
X
api.canamgroupinc.com
X
amacadeeva.pt
X
enlasdiagonales.com.ar
X
dailysportscar.com
X
ic.itp.ifsp.edu.br
X
macdonnell.nt.gov.au
X
mobiletopup.co.uk
X
prace-lab.pl
X
prace-lab2.pl
X
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