Suspicious Website
Gridinsoft currently classifies this site as Suspicious Website. The report highlights 1 blacklist detections and no established public user-review history.
Trust signal radarNormalized trust signals for zlib.reDomain Maturity: 455 daysDomain MaturityWarning Cleanliness: 1 detectionsWarningCleanlinessSafety Level: 1 negative tag, 2 warning signalsSafetyLevelPositive Signals: 1 positive signalsPositiveSignalsPopularity: Estimated low traffic without Tranco or social profile dataPopularityTrust Zone: .reTrust ZoneOperational Signals: 0 detected servicesOperationalSignalsLocation Credibility: Hosting country USLocation Credibility
Figure 1. Trust signal radar for zlib.re. Larger shaded area indicates stronger trust signals.
How we scored zlib.re
On-page mentions:
Books
Tech signals:
Web Application
Negative signals:
security-provider warnings
a malware or phishing blacklist detection (1)
a redirect to another domain (zlib.bz)
unclear social-profile authenticity
limited independent reputation data
Positive signals:
an active SSL certificate (3 months)
multi-language support
a domain age of 15 months
Final destination:
https[:]//zlib.bz/
Last checked September 17, 2026 at 12:17 PM by
Gridinsoft Trust Model v2.5.4
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What is Zlib?
According to its current page title, zlib.re presents itself as โZ-Library โ the worldโs largest e-book library. Your gateway to knowledge and culture.โ. The sections below evaluate the site-specific reputation and technical findings.
Figure 2.
Website screenshot for Zlib.re.
2026-09-17 15:17:39
This domain was registered June 18, 2025 at 8:01 PM through the company Hosting Concepts B.V. d/b/a Openprovider
and ownership information is not publicly available.
Complaint contact not found.
Is zlib.re safe?
Use caution with zlib.re. Its current Gridinsoft trust score is 25/100; review the site-specific findings below before use.
Why is zlib.re marked "Suspicious Website"?
Gridinsoft's current assessment of zlib.re is based on unverified social-link signals, external redirect behavior, and generic page wording. Context considered alongside those findings includes limited public traffic history. 1 of 25 publicly displayed security sources report a warning.
A structured view of the site's detected themes, page signals, and related online footprint elements.
Deals
Books
Bootstrap Framework
This site uses Bootstrap, a widely-adopted open-source framework for responsive web development. Bootstrap enables efficient creation of mobile-friendly interfaces through standardized components and styling.
Multilanguage
The website provides multi-language support, demonstrating international accessibility and commitment to diverse user populations. Multi-language implementation typically indicates professional development standards and global operational scope, representing a positive trust indicator.
Web Application
zlib.re is configured as an installable web application (PWA-style behavior) with app-like interaction patterns.
AI-generated Text
This site contains text patterns consistent with machine-generated or AI-assisted content production.
Redirects to Another Domain
This site redirects visitors to a different domain. This can be legitimate in some migrations or forwarding setups, but it reduces transparency for users evaluating the original address.
Fake Social Media Links - Risk
zlib.re: Automated analysis found social media icons or links that did not lead to recognizable public profiles. This can result from outdated, incomplete, or template-based content. Check the links directly before relying on them to confirm the site's public presence.
This section shows what independent external security sources say about this site.
A warning appears when one or more sources report malware, phishing, abuse, or other safety concerns. Each row shows the source and its verdict.
If no source reports a warning, the site is shown as clear in this section.
alphaMountain.ai
Suspicious
External provider results for Zlib.re, last checked September 8, 2026.
โ VirusTotal
Domain Information
CreatedJune 18, 2025 at 8:01 PMUpdated: June 22, 2026 at 5:54 AM ยท Expires: June 18, 2028 at 8:01 PM
Domain Age15 months
RegistrarHosting Concepts B.V. d/b/a Openprovider
Domain StatusA C T I V E
Registry SourceFRNIC
Top Level Domain.reDomain Extension
Technical Details
HTTP status301
IP Address104.21.51.39
Hosting ProviderAS13335 Cloudflare, Inc.San Francisco, California, US
SSL CertificateYR2TLS 1.3 ยท Valid for: 3 months ยท from July 30, 2026 at 2:46 PM ยท to October 28, 2026 at 2:46 PM
Name Serverskarl.ns.cloudflare.com paloma.ns.cloudflare.com
Content Analysis
Website titleZ-Library โ the worldโs largest e-book library. Your gateway to knowledge and culture.
Website descriptionZ-Library is an online library dedicated to enhancing global education through easy access to books. Recognizing books as a valuable source of knowledge throughout history, we aim to provide free literature access to ...
Available languages
Mentioned hosts (42)
ko.zlib.bzz-library.skzlib.rezh.zlib.bzru.zlib.bzit.zlib.bztw.zlib.bzel.zlib.bztr.zlib.bzur.zlib.bzpl.zlib.bzaz.zlib.bzz-lib.skte.zlib.bzlibrary-access.sk
and 27 more
Security Analysis
Detection SignaturesThese signatures are used to generate the security fingerprint below.
DealsBooksBootstrap FrameworkWeb ApplicationFake Social Media Links - Risk
Security FingerprintUnique identifier based on site analysis
If you own Zlib.re and want to challenge the trust score, please submit a review request via portal.gridinsoft.com. There you can claim your profile and add verified company/contact details. If you cannot access the portal, email legal(at)gridinsoft.com with proof of legitimacy and contact details. We never charge website owners for reviews or reconsideration requests. For more information, please review our Disclaimer.
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Help protect others by sharing this page on social media! The more people who know about zlib.re, the fewer chances they have to deceive someone else.Help others evaluate zlib.re by sharing this page on social media!
Help protect others by sharing this page on social media! The more people who know about zlib.re, the fewer chances they have to deceive someone else. Help others evaluate zlib.re by sharing this page on social media!