How do I trim an audio file online?

Upload your audio file to ToolSuite Audio Trimmer, then drag the trim handles on the waveform display to select the portion you want to keep. You can also enter precise start and end timestamps in HH:MM:SS.ms format. Click Process to trim, then download the result in your chosen format.

What audio formats are supported?

ToolSuite supports MP3, WAV, OGG, FLAC, AAC, and M4A for input. Output formats include MP3, WAV, OGG, FLAC, and AAC. You can convert between formats while trimming — for example, upload a WAV file and download the trimmed result as MP3 to reduce file size.

How does browser-based audio processing work?

ToolSuite uses ffmpeg.wasm, a WebAssembly version of the industry-standard FFmpeg audio/video processing library. WebAssembly runs native-speed code directly in your browser without any server processing. The Web Audio API is used for decoding and waveform visualization. This means near-native performance with complete privacy.

What is the maximum file size I can upload?

The maximum input file size is 50MB. This accommodates most audio files — a typical 4-minute MP3 at 320kbps is about 10MB, and a 10-minute WAV file is about 100MB (which would need to be split). For larger files, consider converting to a compressed format first.

Is my audio file uploaded to a server?

No. ToolSuite processes audio entirely in your browser using WebAssembly (ffmpeg.wasm). Your audio file never leaves your device — no upload, no server processing, no cloud storage. This is critical for sensitive audio like voice recordings, unreleased music, or confidential meeting recordings.

How do I convert MP3 to WAV?

Upload your MP3 file, select WAV as the output format, and click Process. You can optionally trim the audio before converting. WAV is uncompressed lossless audio, so the output file will be significantly larger than the MP3 but will not have any additional quality loss from the conversion.

What bitrate should I use for my audio?

For voice/podcast: 64-128kbps MP3 (mono 64kbps saves space). For music: 192-320kbps MP3 or use lossless FLAC/WAV. For audiobooks: 32-64kbps is sufficient. Higher bitrate means better quality but larger files. 128kbps is the sweet spot for general-purpose audio where quality and size both matter.

Can I add fade in and fade out effects?

Yes. Set fade in duration (0-10 seconds) for a gradual volume increase at the start, and fade out duration (0-10 seconds) for a gradual decrease at the end. Fades are applied during processing using ffmpeg.wasm. This is essential for creating professional-sounding clips without abrupt starts or ends.

How do I cut a specific section from an audio file?

Use the waveform editor to visually select the section you want to keep by dragging the start and end handles. For precise cuts, enter exact timestamps in the start and end time fields (HH:MM:SS.ms format). Use the loop playback feature to preview your selection, then process and download.

What's the difference between MP3, WAV, OGG, and FLAC?

MP3 is a lossy format — it compresses audio by removing inaudible frequencies, producing small files (good for distribution). WAV is uncompressed lossless — full quality but large files (good for editing). OGG Vorbis is lossy like MP3 but open-source with generally better quality at the same bitrate. FLAC is lossless like WAV but compressed to about 50-60% the size (good for archival).

Audio Trimmer & Converter

Cut MP3, WAV, OGG, FLAC, AAC, or M4A files in your browser. Audio contents are not uploaded.

Drop your audio file here

Drop files here or click to browse

Supports MP3, WAV, OGG, FLAC, AAC, M4A

mp3wavoggflacaacm4a

Max file size: 50.0 MB

ToolSuite Audio Trimmer is a free browser-based audio editor that trims, cuts, and converts audio files using a visual waveform display. Powered by ffmpeg.wasm (WebAssembly), it supports MP3, WAV, OGG, FLAC, and AAC with fade effects, variable playback speed, and configurable bitrate. All processing happens locally — your audio never leaves your browser.

How to Trim Audio Online

Upload Audio

Select an audio file (MP3, WAV, OGG, FLAC, AAC, M4A) up to 50MB

Trim and Edit

Drag waveform handles or enter precise timestamps, add fade in/out effects

Convert and Download

Choose output format and bitrate, then download the processed audio

Upload Audio

Select an audio file (MP3, WAV, OGG, FLAC, AAC, M4A) up to 50MB

Trim and Edit

Drag waveform handles or enter precise timestamps, add fade in/out effects

Convert and Download

Choose output format and bitrate, then download the processed audio

Audio Trimmer Features

Visual Waveform Editor

Drag handles on a waveform display for intuitive, precise trimming

Millisecond Accuracy

Enter exact timestamps in HH:MM:SS.ms format for precision cuts

Fade Effects

Apply smooth fade in and fade out from 0 to 10 seconds each

Format Conversion

Convert between MP3, WAV, OGG, FLAC, and AAC formats

Variable Playback

Preview at 0.5x to 2x speed with loop mode for selected regions

Configurable Output

Set bitrate (64-320kbps) and sample rate (8000-48000Hz)

Who Uses an Audio Trimmer?

Podcasters

Trimming intro and outro segments for clean episode boundaries

Musicians

Creating ringtones and audio clips from songs

Content Creators

Extracting audio snippets for social media and reels

Educators

Trimming lecture recordings and isolating specific segments

Voice-Over Artists

Cutting and formatting audio samples for clients

Why Choose ToolSuite Audio Trimmer?

Feature	ToolSuite	Audacity	mp3cut.net	AudioTrimmer.com
Privacy (no upload)	Yes	Yes	No	No
No installation	Yes	No	Yes	Yes
Waveform editor	Yes	Yes	Basic	No
Format conversion	5 formats	Many	3 formats	Limited
Fade effects	Yes	Yes	No	No
Millisecond precision	Yes	Yes	No	No