37 free tools in this category
Formatters, generators, encoders, and validators for software developers. JSON, SQL, regex, Base64, UUID, and more — all free, no signup.
Calculate and convert aspect ratios for images and video. Resize dimensions proportionally with ratio lock, common presets, and social media size guides.
Encode text and files to Base64 or decode Base64 strings instantly. Free tool with real-time conversion, URL-safe mode, file upload, and copy functionality.
Convert text to binary, hex, decimal, or octal instantly. Free binary converter with UTF-8 and ASCII encoding, custom delimiters, and real-time output.
Convert colors between HEX, RGB, HSL, and CMYK formats instantly. Live color preview, click-to-copy values, and a built-in color picker. Free, no signup.
Free color picker for developers and designers. Convert HEX to RGB and HSL, generate complementary palettes, and check WCAG contrast ratios for accessible web design.
Generate cron expressions with a visual builder. See human-readable explanations and next 5 run times. Export for AWS EventBridge, Kubernetes, and GitHub Actions.
Minify CSS code instantly. Removes comments, whitespace, trailing semicolons, and empty rules to reduce file size. Free with one-click copy and .min.css download.
Convert CSV to JSON instantly. Paste your CSV data, auto-detect delimiters, preview parsed rows, and download a clean JSON array of objects. Free, no signup.
Free online DNS lookup tool. Query A, AAAA, MX, TXT, CNAME, NS, and SOA records for any domain. View TTL values, raw JSON responses, and response times.
Validate email address format with detailed RFC 5322 checks, TLD verification, and typo detection for common providers like Gmail and Outlook. Free, instant results.
Compare two blocks of text side-by-side to find differences instantly. Highlights added, removed, and unchanged lines with color coding. Great for code review.
Generate secure hashes for text and files. Supports MD5, SHA-1, SHA-256, SHA-512, SHA3-256, RIPEMD-160, and HMAC with secret keys. Free, no signup needed.
Showing 1-12 of 37 tools