The quickest way to share a large audio file is to stop attaching it. Upload it once to a cloud service or file-transfer service, copy the link and send that. Your recipient gets the original file at full quality, and you avoid the email size limit altogether. The rest of this guide covers which type of service suits which job, how to keep quality intact, and how to send demos without handing them to the wrong people.
TL;DR
- Email attachments fail for audio because of size limits: Outlook.com and Gmail accounts cap a message at 20 MB, and a single WAV can pass that in two minutes.
- Send a link, not a file. Upload to cloud storage or a transfer service and paste the link into your message.
- Messaging apps compress media by default. Send audio as a document to keep the original, and check the app's limit first.
- For demos that need feedback, use a link that plays in the browser, with expiry or a password if the song is unreleased.
- Name and tag files properly before sending, so the person on the other end knows which take is which.
Table of Contents
- Why audio files are so big
- Why email attachments fail
- The main ways to share large audio files
- Sending a large audio file by link: step by step
- Sending audio through WhatsApp and other messaging apps
- Keeping the quality intact
- Keeping unreleased songs private
- Our perspective: the file is rarely the real problem
- Sharing demos from your voice memos with Songdrafts
- A simple routine that works
- FAQ
- Sources
Why audio files are so big
A song idea does not stay small for long. Uncompressed stereo audio at CD quality (44.1 kHz, 16-bit) works out at roughly 10 MB per minute, so a three-minute WAV is around 30 MB before you add a second take. Record at 24-bit or 48 kHz, which many phones and interfaces do, and the numbers climb. A compressed MP3 of the same song is a fraction of that, but it has already thrown away detail that a producer or mixing engineer may want.
A long voice memo is a different problem. A forty-minute writing session recorded as lossless audio can be hundreds of megabytes, even though nothing in it is "produced". Add stems, alternate takes or a whole DAW project folder and you are into gigabytes. Ableton notes that Live projects are generally too large to send by email, and its guide lists file-transfer services, cloud storage, in-DAW collaboration tools and screen sharing as the usual alternatives.
Why email attachments fail
Microsoft's support pages say that Outlook.com and Gmail internet email accounts have a 20 MB limit, while Exchange accounts default to 10 MB. That limit covers the attachment and the message together, so a 19 MB file may still bounce. The recipient's own mail provider may apply a stricter limit than yours, which is why a file can leave your outbox and still never arrive.
Microsoft's advice for anything over the limit is to upload the file to a cloud service and paste the share link into the email, or to compress it if that makes it small enough. For audio, compressing means either zipping (which saves little, because audio is already dense) or converting to MP3 or AAC (which saves a lot but loses quality). Neither is ideal for a song you want judged on its sound.
Apple's Mail Drop, used from the Mail app on Apple devices, works the same way in principle: the file is hosted and the recipient gets a link. Apple's support page says recipients have 30 days to download and that their own email app may have a smaller message limit. It is handy for a one-off, but it is not a place to keep a catalogue.
The main ways to share large audio files
There are four types of tool, and each suits a different moment in the writing process.
| Method | Best for | Watch out for |
|---|---|---|
| Free file-transfer services | One-off sends of a WAV or a folder of stems | Links expire after a set period, and free tiers have size caps |
| Cloud storage with a share link | Files you will update or send to several people | Easy to share the wrong folder; permissions need checking |
| Messaging apps | Quick sends to a bandmate | Compression, size limits and no version control |
| A songwriting workspace with demo links | Ideas, takes and demos that need feedback and context | You need to have your material in one place first |
If you only ever send a file once, a free transfer service is perfectly fine. The trouble starts when you send the same song five times in a month, in three versions, to four people. At that point the problem is no longer file size. It is knowing which link points to which version, who has seen it and what they said.
Sending a large audio file by link: step by step
The process is the same whichever service you pick.
- Export the right file. For a demo, a WAV or a high-bitrate MP3 is usual. For a mixing engineer, send the lossless file. Do not send a screen-recorded or messaging-app-compressed copy as your master.
- Name it so it still makes sense in six months. Song title, version, date and key or tempo if useful, for example Harbour Lights_v3_2026-10-24_Dm_92bpm.wav. Our guide on tagging audio files explains the difference between file metadata and the tags you use to organise song ideas.
- Upload to your chosen service. On a slow connection, wait for the upload to finish before closing the tab. Very large uploads can fail in a browser; if that happens, split the content into smaller parts or archive many small files into one.
- Copy the link and set the permissions. Decide whether anyone with the link can open it, whether it should expire and whether it needs a password.
- Paste it into your email or message with context. Say which version it is, what you want back (notes on the chorus, a quote for a mix) and by when.
- Check it from the other side. Open the link in a private browser window to make sure it works without logging in.
A word on archives. The UK Copyright Service, for its own online submissions, accepts up to 20 GB in total with a 4 GB limit per file, recommends archiving many files to keep the folder structure, and says very large browser uploads can fail, in which case files over 4 GB should be split. Those are one organisation's limits, not a universal rule, but the habits are sound for any big transfer: bundle a project into one archive, split anything enormous and expect that a browser may time out.
Sending audio through WhatsApp and other messaging apps
Messaging apps are where audio quality quietly disappears. WhatsApp states that media files are usually compressed. Its iPhone instructions say that to send the original you choose Document, select the audio and send; documents can be up to 2 GB, and files can be picked from iCloud Drive or other sources such as a Google Account or Dropbox. The same page warns that high audio sample rates may not be supported.
That answers the common questions about sending a 20 MB or larger audio file over WhatsApp: it is the document route, not the voice-note or gallery route. It also means a 24-bit/96 kHz file may be refused, so test with a short export before you rely on it.
Even when it works, a chat thread is a poor filing system. The file sits among photos, jokes and replies, and the version you sent last Tuesday is hard to find. For quick sketches between friends that is fine. For anything you may need to prove, retrieve or build on, use a link you can manage.
Keeping the quality intact
Three things protect quality when you share.
Send the format you mean to. A lossless file (WAV, AIFF, FLAC) preserves everything. A lossy file (MP3, AAC) is smaller and fine for listening, not for mixing. Say in your message which one you have sent.
Avoid chains of re-encoding. Each time a lossy file is converted, a little more is lost. Export once from your DAW or recorder, then share that file rather than forwarding copies of copies.
Make sure the service does not transcode. Some audio hosting players create a compressed preview for streaming but keep your original for download. Others replace it. Read the service's description of what it stores before you upload your only copy.
Credits and technical quality matter beyond the transfer too. The Musicians' Union notes that digital distribution needs metadata such as artist, title, writer, label and copyright details and warns that distributors may reject technically poor recordings. Sending a file is only part of the job: the writer credits and rights information should travel with the audio.
Keeping unreleased songs private
A share link is only as private as its settings. Before you send a demo, decide who should hear it and for how long.
- Use expiring links for demos sent to labels, publishers or producers you do not know well.
- Add a password if the link may be forwarded by email or posted in a group chat.
- Avoid public folders. An "anyone with the link" setting on a whole folder shares everything in it, including the rough take you never meant anyone to hear.
- Keep a record of what you sent, to whom and when.
We go into this in more detail in our guide to private music sharing. If your goal is to approach labels, the practical guide to sending demos to labels in the UK covers what to include and what to leave out.
Our perspective: the file is rarely the real problem
We built Songdrafts because we are songwriters, and the pattern is familiar. Getting a file from A to B is a solved problem. The hard part is everything around it: finding the take you meant, remembering which chorus idea went with which verse, and knowing which version your co-writer has heard.
Most people's voice memos live in a flat list called "New Recording 214". When you then send one of them to a collaborator, you are sending a file with no context, and you will get back a reply with no context. The fix is not a bigger upload limit. It is having a board where every take, riff and lyric sits in one place, tagged by key, tempo and stage, with stacked versions of the same idea, so that the thing you share is the right thing.
That is also why we think sharing should not require your listener to sign up. A producer with ten minutes should be able to click a link, hear the demo and leave a timestamped comment at the exact second that bothers them. Links should be able to expire or sit behind a password, and the audio you upload should not be used to train AI. Those are choices about trust, and songwriters should not have to give them up to share a demo.
— SongDrafts
Sharing demos from your voice memos with Songdrafts
If your large audio files are really a pile of voice memos and half-finished ideas, a dedicated workspace may serve you better than another transfer service. Songdrafts lets you import audio losslessly, organise it on a board with your own workflow stages, filter by key, tempo or tag, keep lyrics beside the recording and stack takes as versions. It works offline too, so ideas captured away from a signal are not stuck.
When you are ready to share, you send a direct link. Your collaborator listens in the browser with no account or download, can leave comments pinned to a timestamp, and you can set the link to expire or require a password. If you need everything out again, there is bulk export. Founding Membership is described on our FAQ page, and there is a money-back guarantee for the first 30 days.
A simple routine that works
Whatever tools you use, a short habit saves time.
- Capture the idea and name it straight away, even roughly.
- Once a week, sort new recordings: keep, merge with another idea, or archive.
- Before sharing, pick the best take, export or share the lossless version and write one line of context.
- Use a link with sensible permissions rather than a loose attachment.
- Log the feedback against the song, not in a chat thread.
One person, one song, one place for the latest version is a better answer to the large-file problem than any single upload tool.
FAQ
How do I send an audio file that is too big for email?
Upload it to a cloud service or file-transfer service and paste the link into your email. Microsoft's guidance for Outlook says to use a share link instead of an attachment when a file exceeds the limit. Your recipient opens the link and downloads the original, so there is no compression and no bounce.
How can I send audio over 16 MB or 20 MB on WhatsApp?
Send it as a document rather than as a voice note or gallery item. WhatsApp's iPhone instructions say documents can be up to 2 GB, though very high sample rates may not be supported. If the file is larger than that, share a link instead.
Can I share a very long recording for free?
Often yes, within limits. Free tiers of transfer and storage services cap the size and how long the link lasts, and big browser uploads can fail. Splitting the recording into parts or archiving a folder into one file helps. If you share regularly, check the current limits on the provider's own page before you rely on them.
Will sharing a link reduce the sound quality?
Not if the service stores and delivers your original file, which is the case for most transfer and storage links. Quality is lost when you convert to a lossy format or send through an app that compresses media. Send a WAV or other lossless file when quality matters, and say so in your message.
How do I stop an unreleased demo being passed around?
Use a link that expires and, where possible, one protected by a password. Share with named people only, avoid public folders and keep a note of who has the link. Our guide to private music sharing walks through this.
Sources
- Reduce attachment size to send large files with Outlook, Microsoft Support
- Mail Drop limits, Apple Support
- Best Practices for Collaborating Remotely, Ableton
- Online copyright registration questions, UK Copyright Service
- How to send media, contacts, or location, WhatsApp Help Centre
- Releasing Product, Music Distribution and Promotion, Musicians' Union