Compress Audio Files Online
Shrink audio files by choosing a lower bitrate. The compression runs in your browser — free, with no monthly limit, and the file never leaves your device.
How it works
- Upload your audio file. Drag and drop an audio file into DomeScribe or click the upload area to select one from your device. MP3, WAV, FLAC, M4A, and OGG files are all accepted, and nothing is uploaded.
- Choose a bitrate. Pick 64, 128, 192, or 320 kbps. Lower bitrates produce smaller files; higher bitrates preserve more detail. DomeScribe reads the source bitrate and pre-selects the highest option that will still make the file smaller.
- Compress your audio. Click Compress and DomeScribe re-encodes the file at the chosen bitrate on your device. Audio encoding is quick — usually a few seconds for a song, under a minute for a long podcast.
- Save the compressed audio. When compression finishes, DomeScribe shows the final file size so you can see how much space you saved. Save the file with a free account.
Audio compressor at a glance
- Input formats
- MP3, WAV, FLAC, M4A, OGG
- Bitrate
- 64, 128, 192, or 320 kbps — you choose; the source bitrate is detected so you never upsize
- Privacy
- Compression runs in your browser — the file never leaves your device
- Limits
- Free — no monthly limit; runs on your device (a free account is needed to save the file)
- Setup
- None — works in the browser on any device
Frequently asked questions
Does compressing audio affect sound quality?
At moderate bitrates (128 to 192 kbps for MP3) most listeners will not hear a difference. DomeScribe lets you choose the bitrate so you can find the right balance between file size and audio fidelity.
What audio formats can I compress?
DomeScribe supports MP3, WAV, FLAC, M4A, and OGG audio files. The output keeps the input format and re-encodes it at your chosen bitrate — except FLAC, which is lossless and is re-encoded without a bitrate setting.
What is the maximum audio file size I can upload?
Nothing is uploaded — the compression runs in your browser — so the only limit is your device's memory. Up to about 500 MB works reliably, which covers podcasts, albums, and long recordings.
Is DomeScribe audio compression free?
Yes — free with no monthly limit, because the processing happens on your device. A free account is needed to save the compressed file.
Can I compress a WAV file to MP3?
The compressor keeps the input format: a WAV comes back as a WAV file re-encoded at the bitrate you chose. To turn a WAV into a plain MP3, use DomeScribe's audio converter (also in-browser), then compress the MP3 here if you want a specific bitrate.
What is the best way to compress audio files online?
DomeScribe compresses audio free and entirely in your browser — the file never leaves your device. Pick a target bitrate (128–192 kbps MP3 is transparent for most spoken word and casual listening) and save the smaller file seconds later. It handles MP3, WAV, FLAC, M4A, and OGG.
What bitrate should I use for spoken word vs music?
For spoken word — podcasts, voice memos, lectures — 64 to 128 kbps sounds clean and keeps files small. For music, use 192 kbps or higher; 320 kbps is effectively indistinguishable from lossless for most listeners. DomeScribe offers 64, 128, 192, and 320 kbps so you can match the bitrate to the content.
Related tools
- Compress Video Online — Compress video files in your browser — typically 50–80% smaller with little visible quality loss. Free, no monthly limit, the video never leaves your device.
- Free Online Video & Audio Converter — Convert video and audio files between formats in your browser — MP4, WebM, MOV, MKV, AVI, MP3, FLAC, WAV and more. Free, no monthly limit, nothing is uploaded.
- Extract Audio from Video — Extract the audio from a video file on your device as MP3 — free, no monthly limit. Runs in your browser, nothing is uploaded. FLAC, WAV, M4A on paid plans.