Free online audio and video tools

Live-coding REPL for patterns that produce music in the browser.

Virtual piano keyboard to play with the computer keyboard using a real piano layout.

Joins several audio files into one track with optional crossfade.

Applies effects such as pitch shift, reverb and speed change to audio files online.

Full-featured waveform editor with effects and recording in the browser.

Tool for creating unique sound effects for games from generator presets and parameter tweaks.

Builds chord progressions you can hear and export as MIDI, WAV or PDF.

Visual guide for collaborative music events that shows key, scale and chord context for jamming.

Shows incoming MIDI streams in color so you can see what a controller sends.

Simple rhythm builder with characters that play beats on a grid.

Play a piano together live with another person over the web, for remote lessons or jamming.

Draw a melody and beat on a grid and share it as a link.

Shows a live spectrogram of microphone sound or example audio.

Converts files between many audio, video, image and document formats.

Online converter for media, document and image files.

Generates sine tones at a chosen frequency, level and length as a downloadable test file.

Write music with a small JavaScript API and hear it play, with a gallery of shared ditties.

Easy online drum machine with several drum kits where you build and save beats.

Builds an animated PNG from a set of images.

Crops animated GIF, APNG and WebP images to a region.

Applies filters such as grayscale, sepia, blur and color changes to GIFs.

Builds an animated GIF from uploaded images with per-frame delays.

Compresses animated GIFs by reducing colors, frames and lossy settings.

Resizes animated GIF, WebP and APNG files.