Fix any audio in seconds — no Audacity, no plugins, no upload of your own voice.
Every small audio task — trim a voice memo, boost a quiet recording, slow a fast narrator, swap M4A for MP3, drop a 600 MB WAV under an email cap — runs straight in your browser. The same ffmpeg desktop editors use, just running in your tab.
Drop the file, pick the fix, download — your audio never leaves your browser
Pick your audio tool
Seven tools, one job each. Trim, merge, boost the volume, change the speed, compress, convert to MP3, wrap as MP4 — every one runs in your browser via ffmpeg compiled to WebAssembly, so your voice never leaves your device.
You don't want the first ten seconds of fumbling or the last twenty of dead air in the file you're sending. Trim them off in seconds.
Trim my audioYour podcast intro, the interview, and the outro live in three files. Merge them into one before publishing.
Merge my filesThe voice memo from the morning walk is too quiet on the car speakers. Push it +9 dB with the brick-wall limiter on and it plays at a normal listening level — no distortion, no crackling.
Boost the volumeThe narrator drags at 1× and the lecture flies at 1×. Pick a playback rate between 0.5× and 2× and the new file holds the original pitch — no chipmunk, no underwater.
Change the speedYour MP3, WAV or M4A is too big to attach. Pick a bitrate, see the projected size before you commit, and shrink the file in your browser.
Compress my audioYour recording landed in a format the recipient's app can't open. Convert it to MP3 and end the back-and-forth.
Convert to MP3YouTube and Instagram won't accept a raw MP3. Wrap your song in a video with any cover image, at any resolution, and share it anywhere.
Convert to MP4Why a thirty-second audio edit wants a multi-track timeline
The desktop tools for audio are built for music production. You wanted to trim five seconds off a voice memo.
Audacity, GarageBand, Logic — all built for music
Audacity is free but greets a "trim 5 seconds off a clip" task with a multi-track timeline, a transport bar, and an Export As MP3 menu that asks for an extra plugin the first time. GarageBand and Logic are Mac-only and assume you're making music, not flattening a voice memo. iTunes converts only the codecs Apple likes.
Every desktop audio tool either treats your voice memo as a recording project or refuses to read its container — and the alternative is uploading a recording of your voice to a free converter you've never heard of.
Audio is a codec zoo
Voice Memos writes M4A. Desktop microphones produce WAV. Android voice recorders produce 3GP or OGG. WhatsApp voice notes ship as OPUS. Podcast hosts want MP3 at a specific bitrate. The recipient's app accepts maybe two of those.
Then there's the loudness gap: voice memos are quiet, podcast cuts are loud, and the file you actually want to share is a merge of three of them that should sound consistent.
Your voice is biometric — and you're uploading it to strangers
Sharing audio of yourself — or a guest, or a student, or a relative — through "Free Online Audio Converter" is sharing a biometric identifier with a server you don't control. And the embarrassment of a podcast intro twice as loud as the interview, a voice note no one can play, a recording that bursts into a quiet meeting at full volume, is sharper than for documents.
People *hear* the failure, not just see it. Audio leaks tone and pause and stumble in a way text and images don't.
Trimming audio should be as easy as editing text
Cut from here to here. Drop the volume. Speed it up. These are thirty-second operations and they shouldn't require a desktop install, a multi-track timeline, or an account on a converter site that wants to see your voice before it'll let you have it back.
The fact that "make this voice memo louder so I can hear it in the car" demands either Audacity or an upload to a stranger is a failure of the toolchain.
“We know how it feels to have a great recording stuck in the wrong format, or three voice memos that need to become one MP3, or a voice memo too quiet to hear on a car speaker — and to discover that the only paths forward are a 40 MB Audacity install you'll use once or an upload of your own voice to a site you've never heard of.”
The same ffmpeg desktop editors use — running in your browser tab
Three steps. That's it.
Pick the tool that does the one thing you need, drop your sound file in, download the fixed audio.
Pick the audio tool
Trim, merge, boost the volume, change the speed, swap the format, wrap as MP4, compress — one tool per task, easy to bookmark.
Drop your sound file in
Single file or a batch. The audio is decoded, edited and re-encoded entirely in your browser tab — no upload, no Audacity project.
Download the fixed audio
The original is untouched. You get a clean new file ready to send wherever was asking — WhatsApp, the podcast host, the family chat.
Without a free, local audio toolkit
Small audio problems don't seem like a big deal — until the podcast guest's WAV lands in your inbox the morning of release.
- The podcast guest sends a 600 MB WAV the morning of release; you have no compressor and upload it to "Free Online Audio Converter" so the voice ends up on a server in another country
- The voice memo from the morning walk is too quiet to hear on the car speaker, and the only thing on the phone that can boost it is a $9.99 app
- A WhatsApp OGG voice note from a relative won't play on the recipient's iPhone, and a week of "did you get it?" follows
- A language teacher uploads twenty student-named M4A files to a stranger's server to convert them to MP3 before remembering the filenames have actual students' names in them
- A podcast intro goes out twice as loud as the interview because the levelling step was the one the producer skipped — listeners notice in the first ten seconds
From "I'll trim it later in Audacity" — to trimmed in the same tab, in under two minutes
Before
- A 600 MB WAV interview arrives the morning of release and the email won't take it, the host has no compressor on hand, and the upload window is closing
- A walking voice memo is barely audible on the car speakers, and the only thing the phone offers is a $9.99 app
- A relative's OGG voice note won't open on the iPhone, and the family chat has been asking for three days
After
- The WAV compresses to a 38 MB MP3 at 128 kbps in under two minutes, the upload accepts, and the episode ships on time
- The voice memo gets +9 dB with the brick-wall limiter on, plays at a normal listening level in the car, and the idea isn't lost
- The OGG becomes a clean MP3 in a single drop, the iPhone opens it on the first try, and the family chat ends in heart emojis
Why fix audio here
No Audacity, no LAME plugin
No 40 MB install for a single trim, no GarageBand project, no iTunes library. The encoder ships with the page, not behind a download.
No account, no email gate
No sign-up, no daily quota counting down in the corner, no Pro tier locking the operation you actually need.
Your voice stays on your device
ffmpeg runs in your browser tab via WebAssembly — the audio is decoded and re-encoded locally. Nothing uploaded, nothing to delete from a server afterwards.
Your original stays put
Every tool writes a new audio file named after your source. The recording you started with is exactly as your device captured it.
No watermark, no length cap
The free output is the same output — no audio stamp at the end, no thirty-second cutoff on the free tier.
One tool per task
Seven small tools, each at its own URL. Easy to bookmark, easy to send to a podcast guest who only needs the compressor.