All Tools

Convert px to rem, rem to px, and px to em instantly. Set your own base font size for accurate, project-specific CSS calculations.

Convert salary between hourly, daily, weekly, bi-weekly, semi-monthly, monthly, quarterly, and annual pay, with overtime and deductions for net take-home pay.

Solve any triangle by entering sides and angles. Supports general triangles (SSS, SAS, ASA, AAS, SSA), right triangles, and the Pythagorean theorem with step-by-step solutions.

Convert between Volts, Millivolts, Kilovolts, Microvolts and more. Instant results with adjustable precision for electronics and electrical engineering.

See tonight's moon phase, illumination, and moonrise/moonset times for your location, plus a monthly grid and upcoming New and Full Moons.

Calculate the network address, broadcast address, usable host range, and CIDR notation for IPv4 and IPv6 networks, with a binary breakdown and CIDR table.

Generate complete HTML meta tags for SEO, Open Graph, and Twitter Card with a live preview across Google, Facebook, and X.

Build a robots.txt file visually. Pick user-agents, set allow/disallow paths, add sitemaps and crawl-delay, then copy or download the file.

Generate JSON-LD structured data for your website. Pick a schema type, fill in the fields, and copy ready-to-use markup for Google rich results.

Check keyword frequency and density in text or HTML content, with n-gram analysis, stop-word filtering, a target keyword rating, and CSV export.

Generate and verify bcrypt password hashes with an adjustable cost factor. Everything runs in your browser, so passwords never leave your device.

Generate RSA public and private key pairs in PEM format with custom key sizes, encryption or signing types, and a SHA-256 fingerprint.