Scan APIs, Analyze OpenAPI Specs, and Decode JWTs in One Tool
REST, SOAP, OpenAPI, and JWT tokens in one place. Point the scanner at a live API, upload a Swagger / OpenAPI spec to flag insecure endpoints, and paste any JWT to inspect its header, claims, and signature weaknesses.
Live API scan
Try API Scanner
OpenAPI / Swagger analyzer
Try Swagger Analyzer
JWT decoder & signature weakness analyzer
Try JWT Analyzer
How It Works
From target input to actionable findings in three straightforward steps.
Pick the Mode
Scan a live API, upload an OpenAPI / Swagger spec, or paste a JWT — whichever matches what you are auditing.
Automated Checks
The engine runs authentication, authorization, mass-assignment, injection, and JWT-signing checks against your input.
Findings + Next Steps
Results are grouped by endpoint / claim with severity and a one-line remediation.
Key Capabilities
Purpose-built scanning backed by real penetration testing expertise.
REST & SOAP Coverage
Exercises GET/POST/PUT/PATCH/DELETE with auth variants and common injection payloads.
OpenAPI / Swagger Parser
Flags endpoints without auth, overly broad scopes, undocumented response codes, and missing rate limits.
JWT Weakness Detection
alg=none, weak HS256 secrets, kid injection, missing exp/iss/aud, signature stripping.
AuthZ Playbook
Runs BOLA / BFLA probes to catch broken object-level and function-level authorization.
Consistent with Live Scans
The same engine that powers the paid Pentestas scans runs the free checks — no placeholder logic.
No Tool Switching
Swagger analysis and JWT decoding are first-class sections of this tool, not separate pages.
Common Use Cases
Why Use Pentestas
Security tools built by penetration testers, not just developers.
Enterprise-Grade Accuracy
Our scanning engine is built on the same methodologies our penetration testers use in manual engagements, tuned to minimize false positives and surface genuine risk.
Fast, Actionable Results
Get findings in minutes rather than days. Every result includes severity ratings, technical evidence, and clear remediation steps your team can act on immediately.
Continuous Monitoring
Schedule recurring scans from the Pentestas platform to catch regressions before they reach production. Stay ahead of new CVEs and configuration drift.
Privacy First
Your scan data is encrypted at rest and in transit. You own your data, with full control over retention and export.
Detailed Reporting
Export findings as PDF, CSV, or JSON. Feed results directly into your SIEM, ticketing system, or CI/CD pipeline through our REST API.
Instant Setup
Run scans directly from your browser. Enter a target, click scan, and receive results. Ready in under a minute.
Start scanning with API Scanner today
Create a free account and run your first scan in under a minute. Full platform access during your 14-day trial.
Frequently Asked Questions
Can I run all three checks at once?
Is GraphQL covered here?
Does the free tier keep a history?
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