Audio Tools

Extract, convert, and clean up audio from video — trim, merge, remove silence, and normalize loudness.

About

Start with the goal. Need maximum playback compatibility? Use MP4 → MP3. Want a lightweight extract and your video already has AAC audio? MP4 → M4A can be faster because it copies the audio stream instead of re-encoding.

Know what to expect in the result: compressed formats (MP3/M4A) trade size for quality, and file size mostly follows duration + bitrate. Loudness normalization changes perceived volume (LUFS), but it won’t remove background noise or fix a distorted recording.

A reliable order is: extract → trim → remove silence (optional) → merge → normalize. If MP4 → M4A fails, the audio inside your video may not be compatible with M4A stream-copy—use MP4 → MP3 instead.

FAQ

›When is it “no re-encode” or lossless?

Only when the tool can copy the existing audio stream into a new container (stream copy). For example, MP4 → M4A can be lossless when the source audio is compatible (commonly AAC). Other tools often re-encode to produce an MP3 output or apply edits.

›Why did MP4 → M4A fail?

The video may contain a non‑AAC audio codec or unusual track metadata. This tool uses stream copy (fast, no quality loss when supported), so incompatible inputs can fail. If you need a guaranteed output, use MP4 → MP3.

›My result is louder/quieter or clips — what should I change?

Normalization targets loudness, not peaks. If you hear distortion/clipping, choose a slightly lower target (more headroom) or normalize after trimming/merging. If the file is simply quieter, pick a higher target preset.

›Is my audio stored?

Files are processed to generate your download and aren’t meant to be retained long‑term. Still, avoid uploading highly sensitive recordings and always review the output before sharing.