free, runs in your browser, nothing uploads
Convert an audio file. Without uploading it anywhere.
Drop an MP3, WAV, M4A, FLAC, MP4 — whatever you have. We convert, cut, or clean it right here in the tab. It never touches a server. Your unreleased track stays yours.
drop an audio or video file
We'll auto-detect the format and let you pick what to do with it. Drop multiple files for batch conversion.
01.Pick a focused tool
MP4 → MP3
Pull the audio out of a video. Phone recordings, lectures, podcasts you saved as MP4.
iPhone Voice Memo → MP3
M4A voice memos converted for Android, email, transcription tools — no iTunes, no upload.
WAV → MP3 (320 kbps)
Ableton / Logic / Reaper / FL Studio bounces compressed for SoundCloud, demos, distribution.
WhatsApp Voice Note → MP3
Convert .opus voice messages from WhatsApp, Signal, Telegram, Discord into MP3. Batch a whole chat.
MP3 → WAV
Decompress back to uncompressed PCM for editing, sampling, or DAW import.
FLAC → MP3
Archive-quality FLAC down to portable MP3. Keep the original, generate a copy.
MOV → MP3
QuickTime and iPhone .mov files stripped to clean audio. Same tool, different muxer.
Audio Cutter
Trim the silence, grab a clip, set a ringtone. Visual waveform, drag the handles.
Audio Joiner
Stitch multiple clips into one file. Reorder by drag. Crossfade if you want.
Extract Audio
Any video format in, audio out. MP4, MOV, WebM, MKV — pick your output codec.
WAV → FLAC
Lossless compression for archiving recordings. Same audio, smaller files.
MP3 → M4A
Apple-friendly AAC format for iTunes and iPhone workflows.
Audio Compressor
Shrink an MP3 for Gmail's 25 MB cap, Discord's 10 MB free upload, or a WhatsApp send.
Normalize Audio
Peak-normalize to a target dB so quiet voice memos and podcast cuts sit at the right level.
Podcast Silence Remover
Auto-trim dead air from podcasts, sermons, voice memos, voiceover takes.
iPhone Ringtone Maker
30-second .m4r or Android .mp3 from any song — no iTunes, no GarageBand needed.
Slow Down / Speed Up
Slow a guitar solo to learn it (pitch preserved). Speed a podcast to 1.5×. Same tool.
Audio Reverser
Play any audio file in reverse. For build-ups, sample design, hidden-message hunts.
AIFF → MP3
Logic Pro and GarageBand AIFF bounces compressed to MP3 for sharing and uploads.
M4A → WAV (Audacity)
Fix Audacity's "Advanced Audio Coding file" import error. No FFmpeg install needed.
Audio for Whisper
Locked 16 kHz mono WAV — the format Whisper and whisper.cpp actually want.
Stereo → Mono
Mix L+R to a single channel for podcasts, voicemails, transcripts. Halves the file size.
WAV for SP-404 / MPC
Sample-ready WAV at the right rate for SP-404 MK2 (48 kHz), MPC (44.1 kHz), Splice uploads.
M4B Audiobook → MP3
DRM-free audiobook (.m4b) to MP3 for car stereos, Android, old MP3 players.
MP3 at 320 kbps
Max-quality CBR MP3 for SoundCloud, label submissions, DJ libraries.
Discord Audio Compressor
Auto-fit under Discord's 10 MB / 50 MB / 500 MB upload cap — pick your tier.
Audio for Otter / Rev / Notta
Format your recording exactly how each transcription service wants it.
WAV 44.1 kHz / 16-bit
CD-spec WAV for Splice samples, sample packs, mastering deliverables.
Fade In / Fade Out
Smooth cosine fades on the ends of any audio file. No Audacity needed.
Amplify / Boost Audio
Make a quiet voice memo or lecture audible. +3 to +20 dB with soft limiter.
WAV → MP3 128 kbps
Locked small-MP3 output for podcasts, web embeds, email attachments.
Audio for DaVinci Resolve
48 kHz WAV that Resolve free always imports — fixes silent or rejected audio.
Audio for CapCut
MP3 or WAV preset for CapCut mobile / desktop — fixes silent OPUS / M4A imports.
FLAC → WAV
Decompress lossless FLAC into editable WAV for DAWs and CD authoring.
Change Sample Rate
Resample to 44.1, 48, 96, 22.05, 16 kHz — match your DAW project or fix playback speed.
Mono → Stereo
Duplicate mono into honest dual-mono. For tools that demand a stereo file.
Trim Silence (Top & Tail)
Cut just the leading and trailing silence. Pauses in the middle stay.
Podcast One-Click Prep
Normalize + mono + MP3 in one step. Anchor / Buzzsprout / Spotify ready.
02.Why this site
Most "online audio converter" sites want you to upload a file you wrote, or recorded, or paid for, to a server in someone else's country, wait in a queue, and then trust them to delete it. That's silly. Your browser can already decode and encode audio. We wrap Web Audio and a slim FFmpeg-WebAssembly build with a clean drop target, and that's the whole site.
Local
Your audio stays in the tab. Open the page, kill your wifi, the tools still work. Try it.
Nothing to install
No download, no signup, no daily quota. You're already where you need to be.
Real controls
Bitrate, sample rate, channels, LUFS target — actual values you can pick, not a "Pro" wall.
Batch is normal
Drop 40 voice memos, get 40 MP3s back as a zip. Not a feature we ration.
03.FAQ
Does my audio actually stay on my device?
Yes. Open this page, switch to airplane mode, then drop a file. It still converts. That's the test, and the whole point of the site.
Why does my browser need a moment to "warm up" the first time?
For most conversions we load a small WebAssembly module (around 3 MB) on first use. After that it's cached and instant. Simple MP3 encoding doesn't need it at all.
Which formats can I convert between?
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, and audio extracted from MP4, MOV, WebM, MKV. Most common pairs go both directions.
What about DRM-protected files like Apple Music or Spotify?
Those are encrypted and we can't decrypt them. That's a feature, not a bug. Use the original app to export, or buy the unprotected version.
How big can the file be?
Around 500 MB is a safe ceiling on a modern laptop. We can sometimes handle more, but past 1 GB the browser starts running out of memory.
Are you keeping any data?
We have a privacy-respecting analytics ping (page views, no audio data, no personal identifiers) and Google AdSense ads, which you can opt out of with the consent banner. That's it.
Why is this free?
No servers to run means almost zero cost. There's an ad slot or two. No accounts, no upsell, no Pro tier.