Trim / Cut Audio

Use this tool to cut an audio or video file down to a single segment. You enter a start time and an optional end time, and the tool returns just that slice as a downloadable MP3. The typical job is “keep the middle 30 seconds of this 4‑minute recording” or “drop the first 10 seconds where the microphone was still settling.” It works on full recordings, podcast exports, interviews, lecture captures, voice memos, and the audio portion of video files.

Times can be entered as plain seconds (for example 12.5) or as mm:ss (for example 1:30, or 12:07 for 12 minutes and 7 seconds). The end field is optional — leave it empty and the export runs from your start time to the end of the file. Decimal seconds are accepted when you need sub‑second precision, which matters for cutting on consonants or tight musical transitions.

Optional fade‑in and fade‑out help avoid abrupt cuts. A hard cut in the middle of a waveform almost always produces an audible click, especially on percussive material or any sound with a strong transient at the edit point. Even a very short fade (0.2 s–1 s) is enough to smooth the boundary and make the cut feel intentional instead of accidental. For music, fades of 1–3 seconds are more typical; for speech, 0.3–0.8 s is usually invisible.

The output is a single MP3 with variable bitrate (VBR). VBR is chosen because it gives good quality per megabyte for mixed content and exports quickly. If you’re going to edit the trimmed clip further in a DAW or video editor, keep your original source file and treat the MP3 as a preview or delivery format, not a working master — re‑encoding a trimmed MP3 back into another lossy format stacks compression artifacts.

Boundary quality matters more than most people think. If you hear a click, pop, or “chopped” feeling, three things usually fix it: (1) move the cut slightly to land on a quieter point in the waveform, (2) add a 0.3–0.5 s fade at the affected boundary, or (3) cut a fraction of a second earlier/later so the edit falls between syllables or musical beats. Zooming in on the waveform in a full editor can help, but for most practical trims a short fade is faster and equally good.

Common trim scenarios: isolating a single question from a long interview, clipping a highlight moment from a podcast to share on social media, removing the awkward silence at the start of a Zoom recording, cutting a lecture down to just the Q&A section, preparing a ringtone‑length extract from a song, grabbing a short voice sample for a transcription service, or producing a teaser clip for promoting longer content. In each case the workflow is the same: pick the start, pick the end, optionally soften the edges.

The tool accepts most common audio and video inputs (MP3, M4A, WAV, FLAC, OGG, OPUS, plus MP4/MOV/MKV/WebM with an audio track). For video uploads, only the audio portion is trimmed and exported; the video track is ignored. If an upload fails, the file is usually either corrupted, mislabeled (say, an .mp3 that is actually WMA), or uses a very exotic codec — re‑exporting to MP3 or MP4 from any editor and retrying almost always works.

A clean end‑to‑end workflow: (1) if your source is a video, extract the audio first with MP4 → MP3 or MP4 → M4A, (2) trim the exact segment you need here, (3) if the start or end is still a bit noisy, run the Remove Silence tool to tighten the edges, (4) if the final clip will sit next to other audio, normalize loudness at the very end. Doing these steps in this order limits lossy re‑encoding to a single pass and keeps boundaries clean.

Trimming is a great first step but not the only edit you may want. If you need multiple non‑contiguous segments (intro + outro + a mid‑clip), trim each one separately and then use the Merge tool to stitch them into a single track. For very precise cuts (frame‑accurate music edits, dialog replacement, breath removal inside a sentence), a desktop DAW will outperform any single‑shot online tool — this tool is tuned for fast, practical cuts rather than surgical editing.

Time format tips that save mistakes: mm:ss with a colon is read as minutes and seconds, while a plain number is always read as seconds. So “90” means 90 seconds (1 minute 30 seconds), but “1:30” also means 90 seconds — both are equivalent. If you see the tool cut the wrong amount, double‑check that you didn’t accidentally type “1.30” (one and a third seconds) when you meant “1:30”. Decimal points and colons behave very differently.

File size after trimming is roughly proportional to the trimmed duration. A 10‑second clip is always small regardless of the source; a trimmed 45‑minute lecture is still a substantial download. If the trimmed file is unexpectedly huge, the source was probably a very high‑bitrate master — in that case, trim first and accept the size, or re‑export through a lower‑bitrate MP3 conversion if you control the source.