What These Tools Are For
If you collect, rip, or trade digital music, the same questions come up again and again: is this FLAC really lossless, or was it made from an MP3? Is this "hi-res" file genuine or upsampled from a CD? Was this CD rip done properly? What encoder and settings produced this MP3? These tools answer those questions — accurately, instantly, and without ever uploading your files.
Why In-Browser and No Uploads
Your music is yours. Every tool here processes the file entirely on your own device using the browser's built-in audio and file APIs, so nothing is sent to a server, stored, or logged. That also means they work offline once loaded, and there are no file-size limits imposed by an upload.
How They Fit Together
- Suspect a fake lossless file? Start with the Spectrogram Analyzer to look for a tell-tale lowpass cutoff, then use the MP3 Encoder Detector on the suspected source.
- Checking a CD rip? The Log Checksum Checker confirms the rip log is authentic; the spectrogram confirms the audio.
- Curious what made an MP3? The MP3 Encoder Detector reads the encoder, preset and lowpass straight from the file.
- Checking FLAC integrity? The FLAC Integrity Verifier verifies STREAMINFO MD5 checksums and flags ID3 pollution or Unicode path issues.
- Validating a cue sheet? The CUE Sheet Validator checks INDEX ordering, encoding, and optional audio cross-checks, with a safe auto-fixer.
- Suspect upsampled hi-res? The Fake Hi-Res Detector checks for content above 22 kHz and padded 24-bit samples.
- Inspecting a torrent? The .torrent Inspector shows info hash, announce URLs, and the full file list without uploading.
More tools in this family are on the way — dynamic-range and LUFS loudness meters and others.