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Free YouTube comment generator — mock comment threads with replies, creator hearts, and likes. Save templates locally and download PNG.

Convert salary between annual, monthly, weekly, biweekly, daily, and hourly pay with optional tax estimates.

Free email signature generator — create a professional HTML signature with logo, social icons, and contact details. Preview and copy for Gmail or Outlook. No signup.

Calculate dew point from temperature and relative humidity, or find RH from temperature and dew point. Shows vapor pressure, absolute humidity, and comfort level. Free, browser-based.

Calculate loan EMI, total interest, and payment breakdown for any principal, rate, and tenure.

Encrypt and decrypt text with AES-GCM or AES-CBC using a passphrase or hex key, entirely in your browser.

Generate CSS triangles with the border trick or clip-path. Customize size, direction, and color with live preview.

Free CSS to Tailwind converter and HTML to React JSX tool — paste code, preview, and copy utilities or components in your browser.

Calculate the hourly, daily, and project rates you need to hit your income goals after taxes, expenses, and non-billable time.

Calculate heat index (feels-like temperature) from air temperature and relative humidity. Uses the official NWS Rothfusz formula with heat risk guidance. Free, browser-based.

Calculate sample and population standard deviation and variance from any data set with squared-deviation steps.

Calculate linear, area, and volume thermal expansion from temperature change. ΔL = αL₀ΔT, ΔA = 2αA₀ΔT, ΔV = 3αV₀ΔT. Bimaterial gap mode for differential expansion between two materials. Material presets for steel, aluminum, concrete, and copper. Metric and imperial units. Free, browser-based.