Trim Audio Online
Processing entirely on your device — large files may take a moment.
Set the start and end seconds and the snippet is cut with stream copy — frames are copied as-is between the cut points, so the output is bit-identical to the source and finishes instantly, even for hour-long files.
The same engine handles every audio container the converters accept — MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF and 20 more. The output keeps your input format.
How to trim audio
- 1
Select your files
Drag & drop your MP3 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Set the options above and click the button. Processing runs entirely inside your browser using WebAssembly.
- 3
Download results
Download each converted MP3 file individually, or grab everything at once as a ZIP archive.
About the MP3 format
MP3 (MPEG-1 Audio Layer III) defined digital music: standardized in 1993, popularized by Napster and the first portable players, and freed of all patents in 2017. It is lossy psychoacoustic compression — it discards frequencies the ear supposedly won't miss — at bitrates from 128 to 320 kbps, with ID3 tags carrying title, artist and cover art.
Twenty years of competitors have failed to displace it, because playback support is absolute: every device that has ever played music plays MP3. At 320 kbps even critical listeners struggle to identify it in blind tests, though modern codecs reach the same quality at noticeably lower bitrates.
+Strengths
- ✓Plays on absolutely everything
- ✓Rich tag ecosystem (ID3, cover art)
- ✓320 kbps is transparent for most listeners
!Limitations
- −Lossy ceiling — never a mastering format
- −Less efficient than AAC/Opus at equal quality
- −Low-bitrate artifacts are audible and permanent
Frequently asked questions
Is the cut lossless?
Yes — stream copy never re-encodes. The only nuance: MP3 cuts snap to the nearest frame boundary (about 26 ms), which is inaudible.
Can I use it to make a ringtone?
Absolutely — trim a 30-second hook here, then run it through the MP3→M4R converter for iPhone ringtones.
How do I find the right timestamps?
Any player shows the current position — pause at the spot you want and read the seconds. Enter them as start/end here.