Suspicious Website
Gridinsoft currently classifies this site as Suspicious Website. The report highlights no established public user-review history.
Figure 1.
Website screenshot for Z-lib.to.
2026-03-14 01:00:18
How we scored z-lib.to
On-page mentions:
Books, Downloads
Tech signals:
Web Application, Cloudflare Browser Insights
Negative signals:
automated caution checks
limited independent reputation data
Positive signals:
an active SSL certificate (3 months)
Context signals:
content related to file sharing and downloadable content
Last checked March 13, 2026 at 11:00 PM by
Gridinsoft Trust Model v2.4.1
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What is Z-lib?
According to its current page title, z-lib.to presents itself as “Z-Library Project - Electronic library. Download books free”. The sections below evaluate the site-specific reputation and technical findings.
Use caution with z-lib.to. Its current Gridinsoft trust score is 34/100; review the site-specific findings below before use.
Why is z-lib.to marked "Suspicious Website"?
Gridinsoft's current assessment of z-lib.to is based on automated caution checks and generic page wording. Context considered alongside those findings includes limited public traffic history. The listed status means the domain currently appears in Gridinsoft's own Threat List; it is not a consensus of external providers.
A structured view of the site's detected themes, page signals, and related online footprint elements.
Books
Registration Form
Automated page analysis detected form or data-entry functionality on z-lib.to. Forms can involve user-submitted information, so verify ownership and privacy terms before entering data.
Downloads
Web Application
This site is configured as an installable web application (PWA-style behavior) with app-like interaction patterns.
Cloudflare Browser Insights
This website is proxied through Cloudflare's CDN/network and has Cloudflare Browser Insights enabled.
AI-generated Text
This site contains text patterns consistent with machine-generated or AI-assisted content production.
Heuristic Risk
Listed by Gridinsoft
Gridinsoft Internet Security classified this site as unsafe. As a VirusTotal partner, our detections contribute to broader protection across tools and browsers.
Domain Information
Top Level Domain.toDomain Extension
Domain NameZ-lib.to
Registration details are private or not accessible for this domain.
Technical Details
IP Address104.21.67.57
Hosting ProviderAS13335 Cloudflare, Inc.San Francisco, California, US
SSL CertificateE7QUIC · Valid for: 3 months · from March 1, 2026 at 2:04 PM · to May 30, 2026 at 2:04 PM
If you own Z-lib.to 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 z-lib.to, the fewer chances they have to deceive someone else.Help others evaluate z-lib.to by sharing this page on social media!
Help protect others by sharing this page on social media! The more people who know about z-lib.to, the fewer chances they have to deceive someone else. Help others evaluate z-lib.to by sharing this page on social media!