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https://smallpdf.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
93
GRADE
A
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Amsterdam, Netherlands
200 OK
Checks
9
7 PASS 2 REVIEW
C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
TLS Certificate Expiry & Recommendations
93 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

93
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
4 A records, 14 ms lookup
PASS
4 A records, 14 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 18.239.83.79, 18.239.83.77, 18.239.83.94, 18.239.83.120
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1082.awsdns-07.org, ns-1687.awsdns-18.co.uk, ns-264.awsdns-33.com, ns-928.awsdns-52.net
Info::
5 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 14 ms
Got: 14 ms
A18.239.83.79, 18.239.83.77, 18.239.83.94, 18.239.83.120
AAAA—
CNAME—
NSns-1082.awsdns-07.org, ns-1687.awsdns-18.co.uk, ns-264.awsdns-33.com, ns-928.awsdns-52.net
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
MS=D82821EC5DC0D62EC6EF745FBCD2D5C6763132F2
MS=ms57364651
MS=ms97348809
apple-domain-verification=Ze7VGb9X4V9gLjDq
apple-domain-verification=byPiw0nB93vniGcg
atlassian-domain-verification=4st/VxgUBQMEyqZppxa4/x8zPQcHXvPVwW3OCOsAqtim6UahHg...
globalsign-domain-verification=1FE18C23502E1C6B1D06F26BCC5A8104
globalsign-domain-verification=4A5FFA64F18B12D730361062BD6A068A
globalsign-domain-verification=D99FC250DADE1BDFAD2515617017102A
globalsign-domain-verification=a5c95ae1727ea3b95648945707db2326
google-site-verification=5zJBbVnSgFQHIftNw1nf4nmP1dYaOvt7GLWMzUgc1Wo
google-site-verification=75Ay89P1ISyDh9WxmFNfBLi9zmqO9X4I6kdttoXLk1E
google-site-verification=N8tu1wUb5iGleZ-QGachAYf1MAfLk-lrJ_gCM3lb9dg
google-site-verification=Z9Jvfe8bbTIO1MknSfmcUxX5KQr2roxPS_EOMdA5Rss
google-site-verification=jLQrKahc79wtkp_rti6g48lO5i7WdZtuv-EbRM0d748
linkedin-site-verification=009acd3f-31bb-43e8-a4d2-9d68a3221b9b
openai-domain-verification=dv-9mb9N40hfuZ0wBHWH9s1bC6l
SPF v=spf1 mx include:_spf.google.com include:sendgrid.net ip4:205.201.128.0/20 ip4:...
yahoo-verification-key=0ZSqTbomVgUqnef6O0FvOBQF9wm3dfw4mYPze/wdRJM=
yandex-verification: 1aa895be80b1279
CAALookup not available with standard resolver
Resolved in 14 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://smallpdf.com

https://smallpdf.com

19 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://smallpdf.com20019 msHTTP/1.1
A+
Crawlability
robots.txt present, sitemap with 3900 URLs
PASS
robots.txt present, sitemap with 3900 URLs
Info::
robots.txt is present
Got: 58 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3900 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 58 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *

Sitemap: https://smallpdf.com/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 3900 entries Valid XML Yes
Sample URLs:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.smallpdf.com/
200https://smallpdf.com/

Preferred variant: non-www

HTTP → HTTPS

301http://smallpdf.com/ → https://smallpdf.com/

Consistent

A+
Domain Intelligence
smallpdf.com — via Dynadot Inc, 13 years, 4 months old, hosted on AWS
PASS
smallpdf.com — via Dynadot Inc, 13 years, 4 months old, hosted on AWS
Info::
Domain registered until Feb 13, 2030 (3 years, 10 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Dynadot Inc
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

1339 days

February 13, 2030

SSL certificate

93 days

Issued by Amazon

Domain age

13 years, 4 months

Registered February 13, 2013

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

18.239.83.94

Registrar

Dynadot Inc

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Dynadot Inc
Created February 13, 2013 (13 years, 4 months ago)
Expires February 13, 2030 (3 years, 10 months)
Last Updated July 12, 2022
Name Servers ns-1082.awsdns-07.org, ns-1687.awsdns-18.co.uk, ns-264.awsdns-33.com, ns-928.awsdns-52.net
DNSSEC Not enabled
Hosting
IP Address 18.239.83.94
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.3s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 31 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
10 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
26 ms
Total Time Total request time from DNS lookup through full response.
31 ms

Connection waterfall

DNS Lookup 10 ms TCP Connect 1 ms TLS Handshake 4 ms Server Processing 12 ms Content Transfer 5 ms
A+
CDN & Delivery
AWS CloudFront (Hit from cloudfront)
PASS
AWS CloudFront (Hit from cloudfront)
Info::
Site is served via AWS CloudFront CDN (edge: AMS58-P5)
Got: x-amz-cf-id: hNcITDYcCVkYYbZR8-YusFlipae3E3CZiAb1Z4tmH27TRR9i4QZdUQ==
Info::
CDN cache status: Hit from cloudfront
CDN Detected: AWS CloudFront
Provider AWS CloudFront Cache Status Hit from cloudfront Evidence x-amz-cf-id: hNcITDYcCVkYYbZR8-YusFlipae3E3CZiAb1Z4tmH27TRR9i4QZdUQ==
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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