| What it does | Free technical tools for website diagnostics
| Online JAR viewer and Java decompiler that runs entirely in your browser with no file uploads
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - DNS record queries across four public resolvers
- SSL certificate chain validation with expiry dates
- WHOIS and RDAP domain lookups
- IP WHOIS lookups for network information
- Core Web Vitals and speed testing
- Uptime and reachability checks from multiple regions
- Redirect chain tracing
- Raw data transcripts for verification
- WordPress theme and plugin detection
- Domain name generator with availability checking
| - Inspect decompiled Java source code locally
- View JVM bytecode instructions, operands, and labels
- Explore class structure, fields, methods, and constant pool
- Section-aware hex view of class file bytes
- Support for JAR, WAR, and standalone CLASS files
- Search and filter files and classes by name
- Load remote JAR files from URLs with CORS support
- Preview and export text and image resources
- Web Workers for responsive decompilation
- Safety limits for archive processing: 512 MiB input, 100,000 entries, 2 GiB expanded content
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| What makes it different | - Every result shows raw data and working so users can verify findings themselves
- No signup, no email gates, no trials required
- Measurements are real live lookups, never estimates or guesses
- Affiliate commissions only on findings, never on page loads or passing results
- Dense, specific documentation written for developers and technical users
| - 100% in-browser processing with no file uploads to servers
- Privacy-first design where files are processed locally only
- No installation, account, or Java runtime required
- Multiple inspection views: source, bytecode, hex, and constant pool
- Direct JAR URL loading from CORS-enabled servers
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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) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 5 | 0 |
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| Citation Flow (Majestic) | 7 | 26 |
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| Referring domains (Majestic) | 3 | 18 |
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jarpeek