Audio Trimmer
Cut audio files online, set start and end points, and export a clean clip.
Try it freeFree Audio Tool
MP4 to audio converter online
Extract audio from MP4 videos locally in your browser. Use it for meeting recordings, webinars, lectures, interviews, screen recordings, or clips you want to transcribe.
Free Audio Tools
Professional audio tools right in your browser
Trim, convert, merge, record, extract, estimate, and prepare audio for transcription. No downloads and no signup required for the tools.
Audio Converter
Convert browser-supported audio into a downloadable WAV file.
Try it freeExtract Audio From Video
Extract audio from browser-supported video files into a downloadable audio recording.
Try it freeAudio Merger
Combine multiple audio files into one browser-generated WAV file.
Try it freeMP3 Compressor
Reduce speech audio size with a browser-side, voice-optimized export.
Try it freeAudio Speed Changer
Change audio speed online for free, slow audio down or speed it up, and export a rendered WAV copy.
Try it freeVoice Recorder
Record audio directly from your microphone in the browser.
Try it freeTab Audio Recorder
Capture audio from another Chrome or Edge tab for videos, webinars, and browser playback.
Try it freeTab + Microphone Recorder
Record a Chrome or Edge tab and microphone together for Meet, Zoom Web, Teams, or browser calls without an extension.
Try it freeMeeting Notes Generator
Create a structured meeting agenda and notes template.
Try it freeWord Counter
Count words and characters and estimate speaking time.
Try it freeReading Time Calculator
Paste text and estimate read-aloud duration.
Try it freeAudio Length Estimator
Estimate how long a script will be when spoken.
Try it freeAudio Cleaner / Noise Reducer
Prepare speech audio for transcription with a browser-side voice-focused cleanup export.
Try it freeSilence Remover
Remove low-volume silence from speech recordings and export a shorter WAV file.
Try it freeVolume Normalizer
Normalize speech audio volume in your browser and export a louder, cleaner WAV copy.
Try it freeSplit Audio by Silence
Find quiet gaps in audio and create suggested split points for long recordings.
Try it freeSRT/VTT Cleaner
Clean subtitle text, normalize whitespace, and prepare SRT or VTT files for review.
Try it freeSubtitle Time Shifter
Shift SRT or VTT subtitle timestamps forward or backward.
Try it freeTranscript Word/Quote Extractor
Extract likely quotes, keywords, and useful lines from transcript text.
Try it freeSRT/VTT Converter
Convert subtitle text between SRT, WebVTT, and plain transcript formats.
Try it freeSubtitle Drift Fixer
Fix subtitles that gradually drift out of sync by stretching or compressing timestamps.
Try it freeSubtitle Line Breaker
Reflow SRT or VTT caption text into cleaner lines with configurable length limits.
Try it freeTranscript Cleaner
Clean transcript text by removing timestamps, fillers, repeated spaces, and noisy formatting.
Try it freeTranscript to Show Notes
Generate show notes, chapters, quotes, and keywords from pasted transcript text.
Try it freeAudio Quality Checker
Check audio duration, volume, clipping, silence, channels, and transcription readiness.
Try it freeStereo Channel Splitter
Export the left or right channel from a stereo recording as a separate WAV file.
Try it freeSRT/VTT to Plain Text
Remove subtitle timestamps and numbering to extract readable transcript text.
Try it freeTranscript Timestamp Finder
Search timestamped transcripts and pull matching lines with nearby context.
Try it freeCaption FPS Converter
Convert subtitle timing between common video frame rates such as 23.976, 24, 25, 29.97, and 30 fps.
Try it freeFree browser tool
Runs locally in browserExtract Audio From Video
Extraction is local and records the video audio track in real time. Output format depends on your browser.
Next step
Transcribe the edited audio when you need text
Start free, upload the prepared recording, and get an AI transcript with searchable text, speaker labels, timestamps, summaries, and TXT, DOCX, PDF, SRT, or VTT exports.
Extract audio from MP4
Choose an MP4 file your browser can play and record its audio track into a downloadable audio file. This is useful when the video is only needed for its speech.
Prepare MP4 speech for transcription
MP4 recordings from meetings, phones, webinars, and screen capture tools can be converted to audio first, then uploaded for transcription when you need text.
Browser-supported MP4 only
MP4 is a container, so browser support depends on the codec inside the file. Common H.264/AAC MP4 files usually work in modern browsers.
How it works
How to use the MP4 to Audio Converter
- Choose an MP4 file.
- Click Extract audio.
- Wait while the browser records the MP4 audio track.
- Download the extracted audio file.
FAQ
MP4 to Audio Converter questions
Can I extract audio from an MP4 file?
Yes, if your browser can play the MP4. The extractor records the audio track locally and creates a downloadable audio file.
Does MP4 to audio conversion happen locally?
Yes. The extraction step runs in your browser. Transcription upload is separate if you choose it.
Can I turn MP4 into text instead?
Yes. Use InstantTranscriber MP4 to text if you want an AI transcript from the video.