CV Toolkit

A Comprehensive Network Diagnostics & Utility Toolkit for Android

⚠️ IMPORTANT: If you use this repository, you MUST keep all author attribution intact. DO NOT REMOVE the author credits. See License & Attribution for details.

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📱 About

CV Toolkit is a professional-grade, all-in-one Android application designed for network diagnostics, cloud infrastructure monitoring, system information, and a comprehensive suite of developer utilities. Built with modern Android technologies (Kotlin 2.3.20 + Jetpack Compose), it delivers 74 powerful tools across 77 screens in one beautifully designed app.

Perfect for:

👨‍💻 Network Administrators - Comprehensive network diagnostics and monitoring
🌐 Cloud Engineers - Test connectivity to 311+ regions across 14 cloud providers with real-time graphs
🔐 Security Professionals - Port scanning, SSL checking, and security analysis tools
💻 Software Developers - Encoding, hashing, JWT decoding, and development utilities
🎓 Students & Educators - Learn networking concepts with hands-on tools
🏠 Home Users - Troubleshoot network issues and monitor your connection

Why CV Toolkit?

✅ All processing is done 100% locally on your device
✅ Your data never leaves your phone - complete privacy guaranteed
✅ No registration or account required
✅ Works offline for most tools (network tools require connectivity)
✅ Professional-grade accuracy and performance
✅ Beautiful, modern Material Design 3 interface
✅ Regular updates with new features and improvements

🌟 Feature Highlights

🚀 Advanced CDN & Cloud Latency Testing

The crown jewel of CV Toolkit - a professional-grade network monitoring tool featuring:

Real-time line graphs with multi-region visualization
Continuous monitoring with configurable intervals (1s/2s/5s)
Comprehensive statistics: Min, Max, Avg, Jitter, and Packet Loss tracking
311+ test regions across 14 global cloud providers
Monitor 35+ regions simultaneously with color-coded tracking
Edge location detection for Cloudflare, CloudFront, and Alibaba Cloud
Background service support for uninterrupted monitoring

📱 74 Professional Tools

Everything you need for network diagnostics, development, PDF management, image processing, code editing, and system analysis in one app.

🔒 Privacy-First Design

Zero data collection
No server uploads
100% local processing
Open and transparent

✨ Key Features

🌐 Network Tools (16 Tools)

Speed Test - Comprehensive internet speed testing with download/upload speeds, ping latency, jitter measurement, and historical tracking. Foreground service support for uninterrupted testing
Ping Test - ICMP ping testing with packet count configuration, timeout settings, and detailed statistics (min/max/avg/packet loss)
Continuous Ping - Multi-host real-time ping monitoring with live line graphs, color-coded per host, for ongoing connectivity analysis
Traceroute - Visual network path tracing showing all hops with latency measurements and geographic information
Port Scanner - Scan for open ports on any host with service detection and parallel scanning
Network Scanner (Device Discovery) - Discover all devices connected to your network with MAC address lookup and manufacturer identification
IP Lookup - Get detailed geolocation, ISP, security flags (VPN/proxy/TOR detection), and carrier information for any IP address with local history
DNS Lookup - Comprehensive DNS record querying (A, AAAA, CNAME, MX, TXT, NS, SOA, PTR) with custom DNS server support and response time tracking
Subnet Calculator - Advanced IPv4/IPv6 subnet calculations with CIDR notation, network/broadcast addresses, usable host range, and subnet mask conversion
SSL/TLS Checker - Detailed SSL certificate inspection including validity period, issuer information, subject details, certificate chain, encryption algorithms, and expiration warnings
Whois Lookup - Get domain registration information
HTTP Headers Viewer - Inspect HTTP response headers
Custom Request Builder - Build and send custom HTTP/CURL requests with headers and body
WiFi Analyzer - Analyze WiFi signal strength, channels, and network details
DNS Benchmark - Compare response times across 10 popular DNS providers (Google, Cloudflare, Quad9, OpenDNS, AdGuard, etc.) with bar chart visualization, sorting by speed/name/reliability, configurable query count, and detailed min/max/avg statistics
CDN & Cloud Latency Test - Real-time monitoring with live graphs - Test latency to 311+ regions across 14 major providers with continuous ping, multi-region tracking, detailed statistics (min/max/avg/jitter/packet loss), automatic edge detection, and color-coded line charts:
- AWS (Amazon Web Services)
- GCP (Google Cloud Platform)
- Azure (Microsoft Azure)
- Oracle Cloud
- Alibaba Cloud
- DigitalOcean
- Linode (Akamai)
- Vultr
- Hetzner
- OVH
- Tencent Cloud
- Huawei Cloud
- Lightsail
- Fastly

🛠️ Utility Tools (53 Tools across 9 Categories)

🔄 Encoders & Decoders (8 tools):

JSON Formatter/Validator - Format, minify, and validate JSON with syntax highlighting, statistics (key/value counts, depth, types), configurable indentation, and one-tap copy
Base64 Encoder/Decoder - Encode and decode Base64 strings
URL Encoder/Decoder - Encode and decode URL strings
Binary Converter - Convert text to/from Binary, Hex, and Octal
Hex Encoder/Decoder - Convert text to/from hexadecimal
ASCII Converter - Convert text to ASCII values and vice versa
JWT Decoder - Decode and inspect JWT tokens
Image Base64 - Convert images to/from Base64 encoding

🔐 Security & Crypto (6 tools):

Hash Generator - Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes
Caesar Cipher - Encrypt/decrypt with Caesar cipher, ROT13, ROT47
Morse Code Converter - Convert text to Morse code and back
Password Generator - Generate strong, secure passwords with customizable options
Password Strength Checker - Analyze password entropy, character composition, crack time estimation, detect common patterns/sequences, and provide detailed security checks with visual strength meter
File Hash Calculator - Calculate MD5, SHA, CRC32 hashes for files with metadata

📱 QR & Barcode (3 tools):

QR Code Generator - Generate QR codes from text, URLs, contacts, etc.
Barcode Generator - Generate various barcode formats (EAN, UPC, Code 128, etc.)
QR/Barcode Scanner - Scan and decode QR codes and barcodes with camera

🌐 Web & API (4 tools):

API Tester - Save, organize, and execute API requests with custom headers and body
User Agent Parser - Parse and analyze browser User-Agent strings
Robots.txt Analyzer - Fetch and parse robots.txt files from any domain
Sitemap Viewer - Parse and browse XML sitemaps

📄 PDF & Documents (8 tools):

PDF Viewer - View and navigate PDF documents
PDF Merge - Combine multiple PDF files into one with multi-select import, drag-to-reorder, and full page preview before saving
PDF Split - Split PDF into individual pages or custom page ranges with visual page thumbnails, three split modes (Each Page, Page Range, Select Pages), and page selection/deselection
PDF to Image - Extract PDF pages as high-quality PNG or JPEG images with configurable DPI (72/150/200/300), JPEG quality slider, per-page preview with dimensions and file size, and individual page saving
Image to PDF - Convert images to PDF with multi-select import, drag-to-reorder, per-image rotation (90°/180°/270°), visual crop editor with draggable handles, page size/orientation/margin/fit settings, and full page preview before export
Compress PDF - Reduce PDF file size
PDF Password - Add or remove password protection from PDFs with 128-bit encryption, configurable permissions (printing, copying, modifying), auto-detection of encrypted files, and password verification
Slides to PDF - Convert presentation slides (PPT) to PDF

✏️ Editors (4 tools):

Text Editor - Create and edit text files on device
Markdown Editor - Write markdown with live preview
Markdown Preview - Render and preview markdown content
SVG Viewer & Editor - View and edit SVG vector graphics

🎨 Media & Colors (10 tools):

Compress Image - Reduce image file size while maintaining quality
Image Resizer - Resize images to exact dimensions with social media presets (Instagram, Facebook, Twitter/X, YouTube, LinkedIn, TikTok, Pinterest, WhatsApp) and common sizes (HD, Full HD, 2K, 4K, A4), with aspect ratio locking
Image Cropper - Crop images with 10 asp

CVToolkit

Install / Use

README