Flat / MP3 hosting
MP3 hosting: upload an MP3 and share a listening link
Turn a finished MP3 into a listening link. Upload from your browser or the CLI, check playback, and send the URL to your client, colleague, or learners.
Checking your upload limits... · Public · Limits
Drop your MP3 files here
or choose them from your device.
Select MP3 filesWhat listeners see at your MP3 link
Your MP3 opens with native audio controls for playing, pausing, seeking, and volume. The screenshot shows an eight-second MP3 sample in Flat's viewer.
Flat serves the uploaded MP3 without changing its bitrate or normalizing its volume. Browser controls vary by device.
A single supported file opens with browser playback controls. Several files open in the explorer, where listeners can choose a recording. Public links need no Flat account. Original downloads remain available.
The exact path /audio-sample.mp3 serves the original audio. Use the main link for Flat's viewer or the exact file URL with your own player.
How to upload MP3 audio and get a link
Prepare your recording
Export the final MP3 from your recording or editing tool. Choose a bitrate that fits your sound quality and file-size needs. Listen for distortion, clipping, or missing audio before uploading.
MP3 uses lossy compression. Encoding it again can lose more detail; publish the finished export rather than repeatedly converting it. Keep a WAV original separately if a recipient needs to edit the recording.
Publish from your browser or terminal
In your browserGo to uploaderDrop, publish, copy the link.
Drop your finished recordings into the uploader above, or choose them from your device. Enter your email if signed out, then choose "Publish audio".
Selected files need unique names and publish at the top level. Use the CLI for folders; the browser uploader does not accept folders or extract ZIPs.
TerminalNode.js 20+One command. Files or folders.
npx -y @getflat/cli deploy ./audio-sample.mp3Replace the example path with your recording, or pass a folder path for several files. The CLI preserves relative paths and prints the published URL.
Listen before sharing
Play the published MP3 and check its start, end, volume, and seeking. Copy the main link for listening or the exact MP3 URL for your own player.
Signed-out uploads expire after 1 hour by default. Sign in before expiry to keep them online, or sign in before publishing for no default expiry.
What you can share with MP3 hosting
Voiceover approvals
Send a finished take for a client to hear. Each upload gets a version link; collect comments in your existing conversation.
Music demos
Share a compressed listening copy of a mix. Recipients can hear it in a compatible browser or download the MP3.
Lesson recordings
Give learners a short pronunciation exercise or spoken explanation. They can pause and replay it using browser controls.
Keep a version, or keep an address.
Share this version
Every upload gets its own link. Publishing revised files creates a new link and leaves the earlier version unchanged. Use the version link when someone needs to review a specific upload.
Update files at one address
Use a named onflat.page address or your own domain. Sign in, then publish with the CLI using --domain. Publish revised files with the same domain to point that address to the new upload.
Named addresses are included on Free. Adding your own domain requires a paid plan. The browser uploader does not set up or repoint these addresses.
MP3 hosting questions
Is hosting free, and what are the limits?
Yes. Signed-in Free includes 5 MiB per upload, 1 GiB of storage, and 5 GiB of monthly transfer, with no default expiry. The per-upload limit covers all files in that upload. Paid plans raise these limits.
Do readers need a Flat account?
No. Public links open without a Flat account. Anyone with the link can open the uploaded files. Password-protected links also require the visitor password.
Can I password-protect my upload?
Yes. Password protection is available on every plan. Add --password YOUR_PASSWORD to your CLI deploy command. It protects access to the upload and its files, but does not prevent someone with access from saving a copy. The browser uploader creates public uploads.
Can I replace files without changing the link?
A version link always refers to its original upload. For same-address updates, use a named address or your own domain. Publish revised files with the same --domain value in the CLI to point that address to the new upload.
What happens when an upload expires?
Flat stops serving it. An expired upload cannot be recovered. Signed-out uploads expire after 1 hour by default. For browser uploads, use the sign-in link shown after publishing. For CLI uploads, run npx -y @getflat/cli login. Complete sign-in before expiry to keep the upload online. If you chose a shorter expiry in the CLI, that deadline stays in place.
How do I turn an MP3 into a link?
Upload the MP3 above or deploy it with the CLI. Flat returns a viewer URL. For a direct file link, use that address followed by the exact filename, or choose "Open original" in the viewer.
Will my MP3 sound different after uploading?
Flat keeps the uploaded bytes unchanged. It does not re-encode, master, or normalize the recording. Playback volume and sound output still depend on the listener's device and settings.
Can I use MP3 hosting to publish a podcast?
You can host a finished episode file within your plan's limits. Flat does not create podcast RSS feeds, submit episodes to directories, or provide podcast analytics. Its built-in preview also has a separate size limit.
How large can a MP3 preview be?
Flat's built-in viewer previews audio files up to 5 MiB, provided the browser supports the encoding. Your hosting plan may allow larger uploads, but paid plans do not raise this preview limit. Larger recordings remain available at their original URLs for downloading or use with your own compatible player.
Can I embed my MP3 recording on a website?
Use a public upload's original audio URL:
<audio controls src="https://YOUR-ADDRESS.onflat.page/audio-sample.mp3"></audio>The generated Flat viewer cannot be embedded in an iframe. Your own player still relies on browser codec support and autoplay rules.
Another audio format?
Find the guide for your audio file.
Share your next MP3 recording.
Publish the finished audio, check playback, and copy the link.
Publish audioFree to start · View pricing