zer.ai

zer.ai is a browser-first toolkit with 278+ practical tools for file conversion, media editing, developer utilities and everyday web tasks. It includes Image to ICO with multi-size previews and individual downloads, a multitrack Audio Mixer with up to eight tracks, and an Internal Audio Recorder for capturing audio from a selected browser tab without saving video. zer.ai also provides format converters, repeatable workflows, and UUID, UUID v7 and ULID generators. Core tools require no account, and supported operations run locally in the browser whenever possible.