⚡ Developer Tools
Free online utilities for developers. Encode, decode, generate, convert — all in your browser.
Aspect Ratio Calculator
Calculate width or height for any aspect ratio, or find the ratio of your image. Presets for 16:9, 4:3, 21:9, 1:1, and more.
Chmod Calculator
Calculate Linux file permissions in numeric (octal) and symbolic notation
Cron Expression Generator
Build and explain cron expressions visually. Generate cron schedules and see human-readable descriptions.
DPI / PPI Calculator
Convert pixels to print size or calculate required resolution. Enter image dimensions and DPI to get print size in inches/cm, or specify print size to find needed pixels.
.gitignore Generator
Generate .gitignore files by combining templates for languages, frameworks, IDEs, and operating systems
.gitignore for Node.js
Ready-to-use .gitignore for Node.js projects — npm, yarn, pnpm, build artifacts, and environment files
.gitignore for Python
Ready-to-use .gitignore for Python projects — virtualenv, __pycache__, pip, pytest, Jupyter, and IDE files
.gitignore for React
Ready-to-use .gitignore for React projects — CRA, Next.js, Vite, build output, node_modules, and environment files
Htaccess Redirect Generator
Generate .htaccess redirect rules — 301, 302, HTTPS, www, and canonical redirects
IP Subnet Calculator
Calculate subnet mask, CIDR notation, IP range, number of hosts, and network details from any IP address
PPI Calculator
Calculate pixel density (PPI) from screen size and resolution. Compare two displays side by side — monitors, phones, tablets, TVs.
Robots.txt Generator
Generate robots.txt files with visual editor. Block bots, set crawl rules, add sitemaps — with templates for common setups.
Text Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, UPPER_CASE, Title Case, and more
Text to camelCase Converter
Convert any text, snake_case, kebab-case, or PascalCase to camelCase instantly
Text to kebab-case Converter
Convert any text, camelCase, or snake_case to kebab-case instantly
Text to PascalCase Converter
Convert any text, camelCase, snake_case, or kebab-case to PascalCase instantly
Text to Slug Converter
Convert any title or text into a clean, SEO-friendly URL slug — with transliteration, stop-word removal, and custom separators
Text to snake_case Converter
Convert any text, camelCase, PascalCase, or kebab-case to snake_case instantly
TSConfig Generator
Generate tsconfig.json for any TypeScript project. Presets for Node 18/20/22, Next.js, React, libraries — with every compiler option explained.