Tools

Cut the start and end of any audio file in your browser. Millisecond precision, supports MP3, WAV, OGG, FLAC, M4A. Nothing uploads.

Build and validate cron expressions visually — select minutes, hours, days, months with a point-and-click interface.

Build, validate and understand cron expressions. Translate any cron schedule into plain English and preview the next run times.

Lint your Dockerfile against production best practices. Catches insecure defaults (root user, :latest tags), wasteful patterns, and missing directives (HEALTHCHECK, USER, WORKDIR) with a 0-100 quality score.

Calculate your GPA on a 4.0 scale. Add courses with grades and credit hours. Free online GPA calculator for college and university students.

Compare 2-4 loan offers side by side. Calculate EMI, total interest, and total payment for each. Find the best loan deal instantly.

Calculate daily calories, protein, carbs, and fat based on your body stats and goals. Uses Mifflin-St Jeor equation. Free TDEE and macro calculator.

Concatenate multiple audio files into one continuous WAV. Reorder tracks before merging, drop in MP3/OGG/WAV/FLAC/M4A. 100% browser-based.

Free online Pomodoro timer with visual progress ring, audio notifications, and session tracking. Customizable work, short break, and long break durations. Boost your productivity with the Pomodoro Technique.

Calculate your estimated due date from your last menstrual period. Track weeks pregnant, trimester, and key milestones. Free pregnancy calculator.

Calculate stock trading profit, ROI percentage, and break-even price. Includes commissions and tax. Free stock investment calculator.

Calculate your daily water intake based on weight, activity level, and climate. Free hydration calculator with visual glass icons.