| What it does | Free online network diagnostics and developer tools for engineers and IT professionals
| Python framework for building and simulating dynamical systems using block diagrams
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| Stage | Not given
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| Founded | Not given
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| Based in | BD
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| Pricing model | Free
| Open source
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| Pricing | Web Utility Suite: Free forever with complete access to all web-based diagnostic tools via browser, unlimited queries, no registration required. Programmatic API: Coming Soon.
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| Key features | - IP Lookup with geolocation, ISP, and ASN detection
- DNS Lookup and query of multiple record types (A, AAAA, MX, CNAME, TXT, NS, SOA, CAA, PTR)
- Subnet Calculator for IPv4 CIDR blocks and network calculations
- Port Checker for TCP port connectivity testing
- SSL Certificate Checker with expiration and TLS protocol verification
- WHOIS Lookup for domain registration details
- JSON Formatter and Validator with tree view and syntax error detection
- Base64 Encoder and Decoder with file and image support
- cURL to Code Converter supporting 7 programming languages
- UUID v4 and UUID v7 generator with RFC 9562 compliance
| - 30+ solvers including implicit, explicit, and adaptive integrators
- Zero-crossing detection and scheduled events for hybrid systems
- Hot-swappable blocks and solvers during active simulation
- Hierarchical subsystems for modular component design
- MIMO support with multiple input and output ports
- Browser-based visual editor with PathView
- Domain toolboxes for chemical, battery, vehicle, flight, and RF engineering
- Custom blocks through subclassing the base Block class
- Supports continuous-time, discrete-time, and hybrid systems
- FMI integration to wrap Co-Simulation and Model-Exchange FMUs
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| What makes it different | - 100% free with no account, email, or payment required
- Native Node.js execution for sub-second response times without queue delays
- Privacy-focused with zero query logging and strict SSRF security filters
- 28 tools in one place covering both network diagnostics and developer utilities
- All tools run in browser with no software installation or configuration required
| - Readable, scriptable alternative to traditional simulation tools with solver depth
- Full ecosystem including FastSim Rust engine and standalone C code generation
- Minimal runtime dependencies: only numpy, scipy, and matplotlib
- Domain-specific toolboxes for chemical, battery, vehicle, flight, and RF engineering
- MIT license with open source development
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 3 ● no change since last check | 38 ▼ −1 (down) since last check |
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| Trust Flow (Majestic) | 0 | 6 |
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| Citation Flow (Majestic) | 20 | 14 |
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| Referring domains (Majestic) | 4 | 18 |
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