Network & System Tools
IP/CIDR Subnet Calculator
Calculate subnet details from IP and CIDR notation
Base64 Encoder/Decoder
Encode and decode Base64 strings
URL Encoder/Decoder
URL encode and decode strings
JSON Formatter/Validator
Format and validate JSON data
YAML/JSON Converter
Convert between YAML and JSON formats
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
Random Password Generator
Generate secure random passwords
IP/CIDR Subnet Calculator
Base64 Encoder/Decoder
URL Encoder/Decoder
JSON Formatter/Validator
YAML/JSON Converter
Hash Generator
Random Password Generator
Text Processing Tools
Text Diff Checker
Compare two texts and highlight differences
Line Counter/Text Stats
Count lines, words, and characters
Find & Replace Tool
Find and replace text with options
Whitespace Remover
Remove extra whitespace from text
Text Diff Checker
Line Counter/Text Stats
Find & Replace Tool
Whitespace Remover
Conversion & Calculation Tools
Unix Timestamp Converter
Convert between Unix timestamps and dates
Number Base Converter
Convert between hex, binary, decimal, octal
Color Converter
Convert between HEX, RGB, HSL formats
Weight Converter
Convert between kg and stone/lbs
Unix Timestamp Converter
Number Base Converter
Color Converter
Weight Converter
Marathon Training Tools
Pace Zone Calculator
Calculate all training zones from goal marathon time
Training Phase Calculator
Determine current training week and phase
Race Pacing Strategy
Calculate splits for optimal race execution
Fueling Calculator
Plan carbohydrate intake and timing
HRV Trend Tracker
Monitor heart rate variability trends
Weekly Schedule Generator
Get current week's training plan
Training Zones Reference
Complete zone guide and workout library
Race Day Checklist
Complete preparation and execution checklist
Pace Zone Calculator
Training Phase Calculator
Race Pacing Strategy
Fueling Calculator
HRV Trend Tracker
Weekly Schedule Generator
Training Zones Reference
Zone 1 - Recovery
60-70% HR Max
Very easy conversation paceZone 2 - Aerobic Base
70-80% HR Max
Easy conversation paceZone 3 - Tempo
80-85% HR Max
Comfortably hard effortZone 4 - Marathon Pace
85-90% HR Max
Sustained race effortZone 5 - VO2 Max
90-95% HR Max
Hard interval paceKey Workout Types
Easy Runs: Zone 1-2, builds aerobic base, majority of training volume
Tempo Runs: Zone 3, improves lactate threshold, 15-45 min efforts
Marathon Pace: Zone 4, race-specific fitness, build gradually
Intervals: Zone 5, improves VO2 max, short hard efforts with recovery
Long Runs: Zone 1-2 base with marathon pace segments, builds endurance
Race Day Checklist
Week Before Race
3 Days Before
Race Day Morning
During Race
Gear Checklist
Static References
HTTP Status Codes
Complete HTTP status code reference
Azure Region List
All Azure regions and availability zones
Common Ports Reference
Common network ports and services
Docker Commands Cheatsheet
Essential Docker commands reference
HTTP Status Codes Reference
| Code | Status | Description |
|---|---|---|
| 200 | OK | Request succeeded |
| 201 | Created | Request succeeded and created a new resource |
| 204 | No Content | Request succeeded but returns no content |
| 301 | Moved Permanently | Resource moved permanently |
| 302 | Found | Resource temporarily moved |
| 304 | Not Modified | Resource has not been modified |
| 400 | Bad Request | Invalid request syntax |
| 401 | Unauthorized | Authentication required |
| 403 | Forbidden | Server refuses to authorize request |
| 404 | Not Found | Resource not found |
| 405 | Method Not Allowed | Request method not supported |
| 429 | Too Many Requests | Rate limit exceeded |
| 500 | Internal Server Error | Generic server error |
| 502 | Bad Gateway | Invalid response from upstream server |
| 503 | Service Unavailable | Server temporarily unavailable |
| 504 | Gateway Timeout | Upstream server timeout |
Azure Regions Reference
| Region | Code | Location |
|---|---|---|
| East US | eastus | Virginia, USA |
| East US 2 | eastus2 | Virginia, USA |
| West US | westus | California, USA |
| West US 2 | westus2 | Washington, USA |
| West US 3 | westus3 | Arizona, USA |
| Central US | centralus | Iowa, USA |
| North Central US | northcentralus | Illinois, USA |
| South Central US | southcentralus | Texas, USA |
| Canada Central | canadacentral | Toronto, Canada |
| Canada East | canadaeast | Quebec, Canada |
| Brazil South | brazilsouth | São Paulo, Brazil |
| North Europe | northeurope | Ireland |
| West Europe | westeurope | Netherlands |
| UK South | uksouth | London, UK |
| UK West | ukwest | Cardiff, UK |
| France Central | francecentral | Paris, France |
| Germany West Central | germanywestcentral | Frankfurt, Germany |
| Switzerland North | switzerlandnorth | Zurich, Switzerland |
| Norway East | norwayeast | Oslo, Norway |
| Sweden Central | swedencentral | Gävle, Sweden |
| East Asia | eastasia | Hong Kong |
| Southeast Asia | southeastasia | Singapore |
| Japan East | japaneast | Tokyo, Japan |
| Japan West | japanwest | Osaka, Japan |
| Korea Central | koreacentral | Seoul, Korea |
| Central India | centralindia | Pune, India |
| South India | southindia | Chennai, India |
| Australia East | australiaeast | Sydney, Australia |
| Australia Southeast | australiasoutheast | Melbourne, Australia |
| UAE North | uaenorth | Dubai, UAE |
| South Africa North | southafricanorth | Johannesburg, South Africa |
Common Ports Reference
| Port | Service | Protocol | Description |
|---|---|---|---|
| 21 | FTP | TCP | File Transfer Protocol |
| 22 | SSH | TCP | Secure Shell |
| 23 | Telnet | TCP | Unencrypted text communications |
| 25 | SMTP | TCP | Simple Mail Transfer Protocol |
| 53 | DNS | TCP/UDP | Domain Name System |
| 80 | HTTP | TCP | Hypertext Transfer Protocol |
| 110 | POP3 | TCP | Post Office Protocol v3 |
| 143 | IMAP | TCP | Internet Message Access Protocol |
| 443 | HTTPS | TCP | HTTP Secure |
| 3306 | MySQL | TCP | MySQL Database |
| 3389 | RDP | TCP | Remote Desktop Protocol |
| 5432 | PostgreSQL | TCP | PostgreSQL Database |
| 5672 | AMQP | TCP | Advanced Message Queuing Protocol |
| 6379 | Redis | TCP | Redis Database |
| 8080 | HTTP-Alt | TCP | HTTP Alternate |
| 27017 | MongoDB | TCP | MongoDB Database |
Docker Commands Cheatsheet
| Command | Description |
|---|---|
| docker run [image] | Create and start a container |
| docker ps | List running containers |
| docker ps -a | List all containers |
| docker stop [container] | Stop a running container |
| docker start [container] | Start a stopped container |
| docker rm [container] | Remove a container |
| docker images | List images |
| docker rmi [image] | Remove an image |
| docker pull [image] | Pull an image from registry |
| docker push [image] | Push an image to registry |
| docker exec -it [container] /bin/bash | Execute interactive bash shell |
| docker logs [container] | View container logs |
| docker build -t [tag] . | Build image from Dockerfile |
| docker-compose up | Start services defined in docker-compose.yml |
| docker-compose down | Stop and remove containers |
| docker network ls | List networks |
| docker volume ls | List volumes |
| docker inspect [container/image] | Display detailed information |