What format comes back?

Always MP3 at the bitrate you picked, whatever you upload — WAV, M4A, FLAC, OGG, OPUS, WMA, or MP3 itself all come back as MP3, named after the original file.

Will compressing lose quality?

Yes — that is the trade. Lower bitrates make smaller files by discarding audio detail, and the loss cannot be undone by re-encoding at a higher bitrate later. Keep your originals if you may need full quality again.

How much smaller will my files get?

It depends on the source. A WAV file at 64 kbps typically shrinks to well under a tenth of its size; an already-compressed MP3 or M4A shrinks less. At 64 kbps, an hour of audio is roughly 28 MB regardless of the input.

How is pricing calculated?

1 credit per file, with a 2-credit minimum per job. Compressing ten files is 10 credits.

Yes. Compression runs on our own servers, your files are never sent to a third party or used to train a model, and everything is auto-deleted 7 days after the job finishes.

4242tools

← All tools

Compress Audio

Audio → smaller MP31 credits per file

Heavy recordings, voice memos, and podcast files → small MP3s that fit email limits and archives, a whole batch at once.

Qualityexpand_more

Files are encrypted

EXAMPLE

UPLOADED — ORIGINAL SIZE

arrow_forward

COMPRESSED — 64 KBPS MP3

meeting.wav → meeting.mp3 28 MB

interview.m4a → interview.mp3 9 MB

lecture.mp3 → lecture.mp3 21 MB

voice-note.opus → voice-note.mp3 2 MB

What you get

check_circleEvery file re-encoded to MP3 at the bitrate you picked

check_circleOne output per upload, named after the original file

check_circleA single file downloads on its own; a batch comes back as one zip

check_circleSpeech stays clearly intelligible even at the smallest settings

check_circleHeavy compression trades quality for size — keep your originals

How it works

1Upload your audioDrop in any mix of MP3, M4A, WAV, AAC, FLAC, OGG, OPUS, and WMA files — a single recording or a whole folder — and pick a bitrate.

2Every file is re-encodedEach upload is decoded and re-encoded to MP3 at your chosen bitrate. No AI model touches your audio — the compression is fully deterministic.

3Download the smaller filesOne MP3 per upload, named after the original — interview.wav → interview.mp3. A single file downloads on its own; a batch comes back as one zip.

Who uses this tool

TEAMS & MEETINGS

Recordings that fit in email

A one-hour meeting recording shrinks from hundreds of megabytes to a file that clears a 25 MB attachment limit.

VOICE NOTES

Memos small enough to send

Long voice memos compress to a fraction of their size so they send over chat and email without stalling.

PODCASTING

Episodes under host size caps

WAV bounces and heavy masters become MP3s that fit podcast host upload limits and stream fast for listeners.

EDUCATION

Lecture audio for course pages

Compress a semester of lecture recordings so they upload to an LMS and download quickly on student connections.

LEGAL & COMPLIANCE

Archives that fit on disk

Batch-compress interview and call recordings so years of audio fits the case archive without buying storage.

CUSTOMER SUPPORT

Call recordings, storage-sized

Shrink exported call audio before archiving so QA retention policies stop filling the drive.

SECURITY

Built for sensitive documents

Bank statements, medical files, case records. Security isn't a feature we added — it's the foundation.

lock

Encrypted in transit

Encrypted in transit over TLS 1.2+, and stored in access-controlled, encrypted object storage. Files are protected the moment they leave your browser.

admin_panel_settings

Your files stay yours

Workspaces are isolated per account. Role-based access shows teammates only what they need.

auto_delete

Deleted, not stored

Files are deleted after processing. Everything runs on our own hardware and is never sent to an outside AI service, so your data is never used to train models.

dnsProcessed on our own hardwareauto_deleteDeleted after processinglockEncrypted in transit

Questions

For speech — meetings, voice memos, lectures — 32 or 48 kbps gives the smallest files and stays intelligible. 64 kbps is a good default balance. For music, podcasts with intros, or anything produced, 96 or 128 kbps keeps the sound close to the source.