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Audio Trimmer

Cut a section out of an audio file. See the waveform, drag the trim region, add fades, and export WAV.

Runs in browser
Use via MCP

Use from your agent

Streamable HTTP at https://benchline.fabwaseem.com/mcp. No key. The tool name is trim_audio.

mcp.jsonjson
1{
2 "mcpServers": {
3 "benchline": {
4 "url": "https://benchline.fabwaseem.com/mcp"
5 }
6 }
7}
tools/calljson
1{
2 "jsonrpc": "2.0",
3 "id": 1,
4 "method": "tools/call",
5 "params": {
6 "name": "trim_audio",
7 "arguments": {
8 "file": {
9 "url": "https://example.com/file"
10 },
11 "startSec": 1,
12 "endSec": 1,
13 "fadeInSec": 0,
14 "fadeOutSec": 0
15 }
16 }
17}

How it works

Free audio trimmer that runs entirely in your browser. Upload audio, see the waveform, drag-select the part to keep, add fade in and fade out, and download a 16-bit WAV. Your audio never leaves this device.

  1. 01

    Add an audio file

    Drop any audio file. It is decoded in this browser, never uploaded.

  2. 02

    Select the trim region

    Drag across the waveform to choose the part to keep. Start and end times are shown.

  3. 03

    Add fades and export

    Set fade in and fade out lengths, preview the selection, then download the trimmed audio as a 16-bit WAV.

FAQ