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Complete ToolPatch tools directory
ToolPatch is a growing collection of focused utilities and practical workflow toolkits. Each page handles one task with clear inputs, fast results, and usable outputs.
Toolkits for common workflows
Start with a workflow when the job spans several small tools, assumptions, or handoff steps.
Startup Unit Economics Toolkit
Build, stress-test, and communicate your core economics in one workflow.
Network Troubleshooting Toolkit
Diagnose addressing, DNS, and transport bottlenecks quickly.
Lab and Chemistry Calculations Toolkit
Plan solution preparation, dilution, gas-law, reaction-yield, and pH checks with visible chemistry assumptions.
Project Delivery Planning Toolkit
Forecast schedule and delivery risk using practical PM metrics.
Engineering Field Calcs Toolkit
Fast first-pass engineering calculations for site and workshop decisions.
Chart Generators Toolkit
Choose the right chart generator for radar, spider, radial, Gantt, Sankey, bubble, Pareto, funnel, waterfall, trend, comparison, and distribution views.
Marine Navigation Calculators Toolkit
Use practical marine navigation calculators for CPA/TCPA, under-keel clearance, tide windows, route distance, set and drift, fuel range, ETA, anchoring, COLREGs encounter checks, and vessel turning estimates.
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Developer & Network
Featured
Subnet Calculator
Calculate network, broadcast, host range, and mask details from CIDR.
Analyze IPv4 subnets quickly for network planning, lab setup, and infrastructure troubleshooting.
Developer & Network
CIDR Aggregator
Compute a covering supernet for multiple CIDR blocks.
Summarize multiple routes into a single supernet to simplify route tables and policy logic.
Developer & Network
Git Diff Stat Calculator
Calculate lines added/removed from git diff output.
Analyze git diffs with file-by-file breakdown of additions and deletions.
Developer & Network
IP Classifier
Classify IPv4/IPv6 addresses by private, loopback, multicast, and more.
Instantly classify addresses for troubleshooting, security reviews, and docs validation.
Developer & Network
IPv4 to Integer Converter
Convert IPv4 addresses to 32-bit integers and back.
Useful for database indexing, scripting, firewall rule systems, and low-level networking work.
Developer & Network
IPv6 Compressor Expander
Compress or fully expand IPv6 notation.
Normalize IPv6 addresses for documentation, automation pipelines, and compliance checks.
Developer & Network
Latency Budget Calculator
Allocate and track end-to-end latency budget across system components.
Break down response-time targets into frontend, backend, DB, network, and external dependency budgets.
Developer & Network
MTU MSS Calculator
Calculate effective payload and TCP MSS from MTU and tunnel overhead.
Model encapsulation overhead across IPv4/IPv6 and common tunnels to prevent fragmentation issues.
Developer & Network
Packet Loss Impact Estimator
Estimate throughput degradation from loss and RTT assumptions.
Use a practical TCP-oriented rule-of-thumb model to quantify packet loss impact on effective throughput.
Developer & Network
Port Range Planner
Plan port ranges against concurrent session requirements.
Estimate whether a configured port interval can handle projected concurrency safely.
Developer & Network
Supernet Calculator
Find the smallest covering CIDR for an IPv4 start/end range.
Compute the minimal supernet that covers an address interval for route and ACL simplification.
Developer & Network
Throughput Unit Converter
Convert bps/Kbps/Mbps/Gbps and estimate transfer time.
Translate bandwidth units and estimate file transfer durations for operations and capacity planning.
Developer & Network
Uptime SLA Calculator
Translate SLA percentage targets into allowed downtime windows.
Compute maximum allowable downtime for day, week, month, or year across common uptime targets.
Developer & Network
VLSM Planner
Plan variable-length subnet allocations from a base CIDR.
Allocate host requirements into efficiently sized subnets and verify whether all requests fit in the parent block.
Developer & Network
Wildcard Mask Calculator
Convert subnet masks into wildcard masks for ACL rules.
Generate wildcard masks and binary mask views for router and firewall ACL configuration.