OWASP Scan Online — Free Tools, No Signup
Run an OWASP scan online from your browser. Free SSL, headers, and DNS tools need no account and no install. A full SQL injection, XSS, and OWASP scan needs Get Started, email verification, and starter credits.
What Does Scanning a Website for Vulnerabilities Mean?
A plain-English explanation of the process and what you get.
An OWASP scan online means sending automated test requests to discover security weaknesses before attackers can exploit them. The scanner probes your site's URLs, forms, and HTTP headers with crafted payloads — looking for behaviors that indicate SQL injection, XSS, exposed credentials, or misconfigured policies. Results are returned as a prioritized report with evidence and remediation steps.
Vulnify is a cloud-based scanner that runs entirely from your browser — no local agent, no proxy setup, no Burp Suite configuration required. After Get Started and email verification, enter the URL of a site you own on the dashboard, choose a scan depth, and the scanner handles the rest. Quick scans return results in 2–3 minutes. Comprehensive scans run 140+ checks and take 15–20 minutes for larger applications. For a walkthrough, read our how to scan a website for vulnerabilities guide.
According to the OWASP Foundation, injection flaws and security misconfigurations account for the majority of web application vulnerabilities discovered in production. Regular scanning after deployments significantly reduces mean time to detection (MTTD) for new vulnerabilities introduced during development.
Vulnerabilities the Scanner Detects
140+ checks covering OWASP Top 10 and common web security misconfigurations.
- SQL injection (SQLi) — unsanitized inputs that expose or corrupt database records
- Cross-site scripting (XSS) — reflected, stored, and DOM-based script injection
- Exposed sensitive paths — .git directories, admin panels, backup files, .env leaks
- Security header gaps — missing CSP, HSTS, X-Frame-Options, and Permissions-Policy
- SSL/TLS weaknesses — expired certificates, weak protocols, mixed-content warnings
- Open redirects — parameters that redirect users to attacker-controlled URLs
- Cookie security flags — missing Secure, HttpOnly, and SameSite attributes
- CORS misconfiguration — wildcard origins that allow cross-origin data access
- Technology fingerprinting — version disclosure that narrows attack surface for adversaries
- OWASP Top 10 alignment — coverage across injection, broken auth, and misconfiguration
For a detailed breakdown of each check type, see the website security scanner guide or browse the full feature list.
How to Scan a Website for Vulnerabilities
From signup to a prioritized vulnerability report in under 20 minutes.
Create a free Vulnify account
Get Started at vulnify.app. Verify your email. Free starter credits are included — no credit card required to begin scanning.
Enter your target URL
On the dashboard after Get Started, paste the full URL of the site you own or have permission to test (e.g. https://example.com). The scanner crawls from that starting point.
Choose a scan depth
Select Quick for a fast baseline, Standard for most production sites, or Deep/Comprehensive before launches and audits.
Start the scan
Scans run in the cloud. You can close the tab — results will be ready in your dashboard when the scan completes.
Review your vulnerability report
Findings are grouped by severity (Critical, High, Medium, Low). Each finding includes evidence, affected parameter, and step-by-step remediation guidance.
Fix issues and re-scan to verify closure
Address Critical and High findings first. Deploy your fixes, then re-run the scan to confirm each vulnerability is resolved before going live.
Choose the Right Scan Depth
Each depth level trades speed for coverage. Use Quick for fast baselines; Comprehensive for launch readiness.
| Depth | Duration | Checks | Best For |
|---|---|---|---|
| Quick | 2–3 min | ~40 | Fast baseline and pre-release sanity check |
| Standard | 5–7 min | ~80 | Default scan for most production sites |
| Deep | 12–15 min | ~120 | Higher-risk releases and complex apps |
| Comprehensive | 15–20 min | 140+ | Launch readiness, audits, and compliance |
Free Security Checks — No Account Required
Run targeted diagnostics instantly. No signup, no credits consumed.
SSL Certificate Checker
Verify TLS certificate trust, expiry date, and protocol configuration in seconds.
Security Headers Analyzer
Check CSP, HSTS, X-Frame-Options, and other HTTP hardening headers.
DNS Security Check
Verify SPF, DKIM, DMARC records and email authentication configuration.
CSP Checker
Detect unsafe-inline directives, wildcard sources, and missing CSP policies.
HSTS Checker
Confirm Strict-Transport-Security is present and max-age is long enough for production.
CORS Checker for Security
Test Access-Control-Allow-Origin headers and cross-origin API policy risks.
Vulnerability scanner guide
OWASP-aligned scan workflow and depth options. Full scans start after Get Started.
All Free Tools
Browse the complete toolkit: hash generator, JWT decoder, password strength checker, and more.
Guides and Related Scanners
Deep dives on scanning workflows, OWASP coverage, and alternative landing pages for common search phrases.
How to Fix SSL Certificate Errors
Remediate trust, chain, hostname mismatch, and expiry issues on live HTTPS.
Fix CORS Misconfiguration | Step-by-Step Guide
Replace wildcard and reflected Origin policies, then verify with the free CORS checker.
How to Scan a Website for Vulnerabilities
Step-by-step guide for teams running their first vulnerability scan.
OWASP Top 10 Explained (2025)
Understand the risk categories our scanner checks map to.
SAST vs DAST vs SCA
Choose the right scanner type for web apps vs dependencies vs networks.
Cookie Security Explained
HttpOnly, Secure, and SameSite flags — what they do and common mistakes that expose sessions.
SSRF Explained (2026)
How to find and fix server-side request forgery before attackers use it to pivot internally.
Website Security Scanner Overview
Commercial-intent hub for OWASP-aligned scanning and scan depths.
Online Vulnerability Scanner
Cloud DAST-style scanning with no local agent installation.
Free Website Security Scan
Fast baseline checks before running a full vulnerability scan.
How Vulnify Compares
Honest, side-by-side breakdowns for teams evaluating alternatives — pricing, features, and use cases in plain English.
Vulnify vs Acunetix
OWASP-aligned DAST coverage without Acunetix enterprise pricing. See the full feature and cost comparison.
Vulnify vs Sucuri
Vulnerability scanning vs. WAF and malware monitoring. Understand which tool fits your threat model.
Vulnify vs Nessus
Web application scanning vs. network vulnerability assessment. Two different tools for two different scopes.
WordPress Scanner
Plugin CVEs, theme exposure, and wp-admin enumeration checks on top of OWASP coverage.
Shopify Scanner
Store-specific checks for Shopify apps, third-party scripts, and checkout configuration risks.
Joomla Scanner
Extension intelligence and Joomla-specific path checks alongside standard vulnerability scanning.
Frequently Asked Questions
Common questions about scanning websites for vulnerabilities and using Vulnify.
An OWASP scan online is a hosted check of a website you authorize against OWASP Top 10 risks such as injection, broken access control, and misconfiguration. Vulnify runs free SSL, header, and DNS tools with no signup or install. A full OWASP-aligned scan needs Get Started, email verification, and starter credits.
Run an OWASP Scan Online
Get Started for a full scan covering SQL injection, XSS, exposed paths, and misconfigurations. Public SSL, headers, and DNS tools need no account and no install.