Many creators still confuse mastering with loudness compliance. LoudCheck is intentionally not a mastering service. Instead, it gives an objective level check before distribution. We measure practical loudness indicators such as Integrated LUFS, True Peak, and dynamic range so producers can compare their mix against real platform targets before release.

Streaming services normalize audio to reduce sudden volume jumps between tracks. If a song is too loud, platforms often turn it down automatically, which can change punch and balance. If it is too quiet, it may lose perceived energy in playlists. LoudCheck helps teams detect these risks early and make informed engineering decisions before publishing.

Privacy is a core trust requirement for unreleased music. LoudCheck is designed for client-side processing: your file stays in your browser session, and no raw audio upload is required for baseline analysis. This lowers exposure risk for demos, label review versions, and confidential production files.

The platform list reflects global and local listening contexts. We include a country-aware sorting model that simulates Cloudflare's cf-ipcountry behavior. For example, users detected as KR see Melon priority first, while users outside KR see Spotify first. The goal is faster decision-making by putting the most relevant platforms at the top.

LoudCheck is built to be transparent, fast, and practical. The interface starts simple so users can focus on one action: upload and analyze. After upload, it transitions into a professional dashboard with waveform monitoring, metric cards, and platform pass/fail guidance. This step-based UX reduces friction for beginners while preserving depth for engineers.