Audio Trimmer
Cut audio files online, set start and end points, and export a clean clip.
Try it freeFree Audio Tool
Free MP3 compressor online
Reduce speech recording size before sharing, uploading, or archiving. Compress browser-supported audio with settings tuned for spoken-word files.
Free Audio Tools
Professional audio tools right in your browser
Trim, convert, merge, record, 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 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 browserMP3 Compressor
AI Transcription
Interested in fast, accurate AI-based transcription?
Start free, upload your audio, and get a searchable transcript with speaker labels, timestamps, and export options.
Compress speech audio online
Use the MP3 Compressor when a voice recording is too large to upload, email, or archive comfortably. It is designed for spoken-word recordings rather than music mastering.
Reduce file size before upload
Large recordings from phones, meetings, and browser captures can be hard to move around. Compressing the audio can make upload and sharing workflows faster.
Use compression before transcription carefully
Moderate compression is usually fine for clear speech, but very aggressive compression can reduce accuracy. Preview the output before transcribing important recordings.
How it works
How to use the MP3 Compressor
- Choose a browser-supported audio file.
- Compress the recording with speech-focused settings.
- Preview the compressed result.
- Download the smaller audio file.
FAQ
MP3 Compressor questions
Can I compress an MP3 online for free?
Yes. Upload a browser-supported audio file, compress it locally, and download a smaller copy for free.
Will compression affect transcript quality?
Light or moderate compression is usually fine for clear speech. Very low bitrates, heavy noise, or muffled output can make transcription less accurate.
Is this compressor best for music or speech?
It is optimized for spoken-word recordings such as meetings, interviews, lectures, and voice notes.
Can I trim audio before compressing it?
Yes. Trim the recording first if you only need part of the file, then compress the shorter clip.