Developer Tools
Developer utilities: .env editor, CSV viewer, git command builder, Dockerfile linter, README generator, chmod calculator, and dozens more.
.env Editor
Parse, edit, diff, and export .env files with duplicate detection
CSV Viewer & Editor
Parse, edit, sort, filter CSV data and export as JSON, TSV, or Markdown
Semver Calculator
Test semver ranges, compare versions, and explore version range syntax
Git Command Builder
Interactive git command constructor with 40+ operations and explanations
.gitignore Generator
Generate .gitignore files for any language, framework, or IDE
README Generator
Build professional README.md files with badges, sections, and templates
GitHub Actions Validator
Validate GitHub Actions workflow YAML with error detection and best practices
Dockerfile Linter
Lint Dockerfiles for best practices, security issues, and optimization tips
OpenAPI Validator
Validate and visualize OpenAPI/Swagger specs with endpoint cards and schema browser
Changelog Generator
Generate changelogs from git commits using conventional commit format
package.json Analyzer
Analyze package.json for issues, typosquatting risks, and dependency insights
JSON Schema Generator & Validator
Infer JSON Schema from data or validate JSON against a schema with detailed error reports
IP / CIDR Calculator
Calculate network address, broadcast, subnet mask, wildcard, and usable host range from any IPv4 CIDR notation.
chmod Calculator
Interactive Unix file permission calculator with octal and symbolic notation
Code Playground
Browser-based HTML, CSS & JavaScript editor with live preview and console
Email Normalizer
Normalize email addresses — remove dots, plus-tags, and vendor quirks
Chronometer
Stopwatch with lap tracking, split times, and millisecond precision
IPv6 ULA Generator
Generate random IPv6 Unique Local Addresses (fd00::/8)
IPv4 Range to CIDR
Convert IP ranges to CIDR notation and calculate total IPs
ETA Calculator
Calculate estimated time remaining for long-running tasks
Docker Run → Compose
Convert docker run commands to docker-compose.yml
User Agent Parser
Parse and analyze browser user agent strings
JSONPath Tester
Test JSONPath expressions against JSON data with result highlighting
MIME Type Lookup
Search MIME types by extension or type name — 200+ types
Bitwise Calculator
Calculate AND, OR, XOR, NOT, and shifts with visual bit representation
Email Preview
Preview HTML email templates with desktop/mobile viewports and dark mode
Process Scheduler
Visualize CPU scheduling algorithms: FCFS, SJF, SRTF, Round Robin, Priority
Memory Address Calculator
Convert memory addresses between hex, decimal, and binary with pointer arithmetic
HTTP Header Inspector
Parse and analyze raw HTTP headers with descriptions
CRC Calculator
Calculate CRC-8, CRC-16, and CRC-32 checksums with multiple presets
IBAN Validator
Validate IBAN numbers with mod-97 checksum verification and country detection
Keycode Info
Inspect JavaScript key events — event.key, event.code, keyCode, and modifiers
Math Expression Evaluator
Safely evaluate math expressions with sqrt, trig, and log functions — no eval()
MIME Type Reference
Search and browse common MIME types by file extension or category
Percentage Calculator
Calculate percentages, percent of a number, and percentage change
Phone Number Parser
Parse and format phone numbers with country detection and E.164 output