ScheduleBuilder.dev is a free, no-sign-up weekly schedule maker for students, professionals, and everyday routines. Drag and resize color-coded events, start from Student, Work, or Personal templates, and customize themes or background images. Your schedule stays in your browser and can be exported as a high-resolution PNG, print-ready PDF, ICS calendar, or JSON backup. It makes visual planning fast without accounts, subscriptions, or complicated calendar setup.
Free online spectrum analyzer and spectrogram for audio files and microphone input. Measure frequency, dBFS, peaks, and export PNG or CSV locally in your browser.
