Code & Text Compare
Free online text compare tool. Compare two blocks of code or text to see differences, additions, and deletions line-by-line.
Code Diff Tool
Compare code snippets to see added, removed, and modified lines instantly. Fast, free, and secure client-side execution in your browser.
Color Contrast Checker
Check color contrast ratios for WCAG 2.1 accessibility compliance. Test text and background color combinations for AA and AAA standards. Free contrast checker.
Color Converter
Developer Color Converter online. Convert between HEX, RGB, HSL, CMYK instantly.
Common Ports Reference
Searchable list of well-known TCP/UDP ports. Find port numbers, protocols, and service descriptions. Free, private, and runs 100% directly in your web browser.
Core Web Vitals & Performance Budget Calculator
Calculate front-end performance budgets for Core Web Vitals (LCP, INP, CLS). Model network transfer times, JavaScript parse costs, and TCP slow-start limits on mobile 4G.
Credit Card Validator
Validate credit card numbers using Luhn algorithm. Fast, free, and secure client-side execution in your browser.
Cron Expression Generator
Build cron expressions visually. Select minute, hour, day, month, and weekday with dropdowns. See the next run times and human-readable description. Free.
Crontab Guru
Build and understand cron expressions with a visual editor. See next run times, plain-English explanations, and common schedule presets. Free crontab tool.
CSR Decoder
Decode a CSR (Certificate Signing Request) to verify the subject, organization, and other details. Fast, free, and secure client-side execution in your browser.
CSR Info Generator
Generate OpenSSL commands for Certificate Signing Requests (CSR). Fast, free, and secure client-side execution in your browser.
CSS Beautifier
Format and beautify CSS code online. Parse minified CSS, format with proper indentation, and easily copy the result. 100% free and private browser utility.
CSS Border Radius Generator
Visual 8-point CSS border-radius generator. Create organic shapes, blobs, and modern rounded corners with instant live preview and copyable code.
CSS Box Shadow Generator
Design beautiful CSS box shadows visually. Adjust offset, blur, spread, color, and opacity. Multiple shadows, inset support. Copy production CSS code instantly.
CSS Flexbox Generator
Build CSS Flexbox layouts visually. Adjust direction, justify, align, wrap, and gap with live preview. Copy clean CSS code. Free online flex generator.
CSS Grid Generator
Build CSS Grid layouts visually. Set columns, rows, and gaps with sliders. See the live preview and copy ready-to-use CSS code. Free online CSS grid builder.
CSS Minifier
Minify CSS online for free. Remove whitespace, comments, and redundant syntax to reduce file size. Compress your stylesheets for faster page loads.
CSS to Tailwind Converter
Convert standard CSS properties into Tailwind CSS utility classes instantly. Fast, free, and secure client-side execution in your browser.
CSV to JSON Converter
Convert CSV data to JSON format instantly. Auto-detect headers, custom delimiters, preview table. Free online CSV to JSON converter with download.
CSV to XML Converter
Convert CSV or TSV data into well-formed XML documents. Custom root tags, item nodes, element/attribute mapping, and instant download.
Cyclomatic Complexity & Halstead Software Metrics Calculator
Calculate McCabe cyclomatic complexity, Halstead software science metrics, Maintainability Index (MI), estimated defect density, and programming effort from code.
Database Connection Pool Calculator
Calculate optimal database connection pool sizes for PostgreSQL, MySQL, and HikariCP. Balance max_connections, application CPU threads, and memory overhead.
Decimal To Ascii
Convert decimal numbers to ASCII characters. Fast, free, and secure client-side execution in your browser.
Diff Checker
Compare two texts side by side and find differences instantly. Highlight additions, deletions, and changes. Free online diff tool for code, text, and documents.
No tools found
No tools match your current search query or filter. Try a different search term or reset your filters.