If you're trying to identify a sample in a song, the hard part is usually pinning down the exact snippet that contains it. Audjust is a free, in-browser editor that lets you trim a track down to just that section, so you can study or search a clean clip on its own. No signup, no install.
To use it, upload an MP3 or WAV and wait for the editor to load. It detects beats and section boundaries, so you can move the start and end of your selection to the part you suspect is sampled, cut everything else away, and export those few bars.
Two concrete cases: you hear a familiar four-bar chop in a hip-hop track and want to clip just that passage to hum, hand-search, or send to a friend who might know the source. Or a vocal phrase you want to study sits buried in a three-minute song, so you trim the track down to the few seconds around it and export that instead.
Because Audjust snaps the cut points to detected beats, your exported clip starts and ends on the beat rather than mid-note. A clip that doesn't begin or end with an awkward stub is much easier to recognize by ear, or to feed into another tool.
One honest note: the question most people searching "sample identifier" have is whether this names the original song automatically. It doesn't. Audjust has no audio-recognition database. What it does is give you a clean, tightly trimmed clip so a tool like Shazam, or your own ears, has something good to work with.