Flat / FLAC hosting
FLAC hosting: share lossless audio files with a link
Publish FLAC recordings from your browser or the CLI. Share a lossless export with an original download and browser playback where supported.
Checking your upload limits... · Public · Limits
Drop your FLAC files here
or choose them from your device.
Select FLAC filesWhat listeners see at your FLAC link
The screenshot shows a FLAC recording in Flat's native browser player. Flat serves the uploaded FLAC without converting it to a lossy listening format.
FLAC uses lossless compression, preserving the audio samples supplied to its encoder. Playback still depends on the browser's decoder and the listener's audio output.
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.flac serves the original audio. Use the main link for Flat's viewer or the exact file URL with your own player.
How to upload FLAC audio and get a link
Prepare your recording
Export FLAC from your original recording or another lossless source. Check sample rate, bit depth, and channels against the recipient's requirements. Compression settings affect size without discarding audio samples.
Converting an MP3 to FLAC cannot recover lost detail. Keep the source recording when quality matters. For an editor that requires an uncompressed file, see WAV hosting.
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.flacReplace 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
Download the FLAC and confirm it opens in the recipient's audio application. Check browser playback separately, especially for high-resolution or multichannel exports.
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 FLAC hosting
Lossless mix delivery
Send a finished lossless export for a client to download. File delivery preserves the original; it does not guarantee bit-perfect browser audio output.
Recording transfers
Share losslessly compressed recordings between collaborators. Check the hosting plan's upload, storage, and transfer allowances for larger collections.
Listening and source pairs
Publish a FLAC alongside a smaller listening copy. Recipients can choose the review file or download the lossless version.
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.
FLAC 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.
Does Flat keep my FLAC lossless?
Yes. Flat keeps the uploaded file unchanged. It does not transcode it to MP3 or AAC. The original download contains the same encoded audio and metadata.
Is FLAC always smaller than WAV?
FLAC usually uses less space than uncompressed PCM WAV for the same audio. The reduction depends on the source. Compare your actual exports rather than relying on a fixed size ratio.
Can I preview a full lossless album?
You can upload several tracks within your plan's allowance, but each file must meet the viewer's 5 MiB preview limit. Larger tracks remain downloadable. The explorer lets listeners select files; it is not an automatic album playlist.
How large can a FLAC 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 FLAC recording on a website?
Use a public upload's original audio URL:
<audio controls src="https://YOUR-ADDRESS.onflat.page/audio-sample.flac"></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 FLAC recording.
Publish the finished audio, check playback, and copy the link.
Publish audioFree to start · View pricing