Free Online Tools & Utilities
Practical calculators, conversion tools, and technical utilities on ZevByte. Designed for CCTV installers, system administrators, business operators, and software developers.
Solar Setup Planner
Estimate your solar panel system size, battery capacity, and panel count for your home, business, or farm. Get a preliminary technical recommendation and contractor-ready planning report. Prioritizing General Santos City, Koronadal, and Mindanao. No pricing provided — the contractor sends the official quotation.
Features:
- 5-step guided wizard: Location, Appliances, System Type, Brands, Review
- Mindanao-first location profiles (GenSan, Koronadal, South Cotabato, Sarangani)
- Household, small business, and agricultural appliance presets
- Essential vs. total load separation for accurate battery sizing
- Grid-tied, hybrid, and off-grid system configuration
- Equipment brand preference catalog with contractor-recommend option
- Live recalculation — updates instantly as you change inputs
- Print-friendly Preliminary Solar Planning Report
CCTV Storage & Retention Calculator
Estimate video storage requirements, recording-stream bandwidth, RAID capacity, and retention days using an authoritative bitrate-first calculation model.
Features:
- Authoritative bitrate-first surveillance sizing (Quick & Advanced modes)
- Continuous & motion/event recording schedules with activity factor
- Design planning margin & multi-group camera aggregation
- RAID 1, 5, 6, 10 capacity model & intelligent drive solver
- Bi-directional solving: Storage Required & Reverse Retention Days
- Calculations with formula transparency
File Converter Hub
Central suite for image and PDF conversions. Convert between PNG, JPEG, and WebP, create and extract PDFs, and merge or split documents. Designed for on-device processing.
Features:
- Image format converters: PNG, JPG, and WebP with transparency handling
- PDF tools: Images to PDF, PDF page extraction, PDF merge & split
- Deterministic ZIP archive download for multi-page extractions
- 100% browser-local processing — files never leave your device
Image Converter Suite
Fast raster conversion between PNG, JPEG, and modern WebP formats with adjustable compression and alpha channel preservation.
Features:
- PNG, JPG, WebP bi-directional conversions
- Lossy compression quality controls
- 100% browser-local processing — files never leave your device
PDF Utilities Suite
PDF document creation, extraction, and page manipulation utilities. Merge multiple PDFs, split page ranges, and extract pages to images.
Features:
- JPG & PNG to PDF document creation
- PDF page rasterization to PNG & JPG
- PDF concatenation and page range extraction
- 100% browser-local processing — files never leave your device
Visual Subnet & IP Range Breakdown
Interactive CIDR notation visualizer showing usable IP addresses, subnet masks, broadcast targets, and network boundaries for office networks.
Planned Features:
- CIDR prefix range expansion (/24 to /30)
- VLAN allocation planning map
- Usable host IP list generator
ℹ️ Tool architecture is currently under review. No unverified calculations are deployed in MVP.
System Automation ROI & Time-Savings Estimator
Calculate financial payback, hours saved per month, and efficiency gains when replacing manual business processes with custom software or internal tools.
Planned Features:
- Monthly manual operational cost baseline
- Estimated hour reduction by workflow type
- Payback period timeline graph
ℹ️ Tool architecture is currently under review. No unverified calculations are deployed in MVP.
Developer JSON / YAML & Environment Formatter
Utility for validating, formatting, and converting JSON/YAML payloads and `.env` template definitions.
Planned Features:
- JSON to YAML bi-directional converter
- Env variable template sanitizer
- Syntax validation
ℹ️ Tool architecture is currently under review. No unverified calculations are deployed in MVP.