OGG Compressor
Initializing... drag & drop files here
Supports: OGG
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
Reset to defaults
Need help?Compress OGG Audio Online
An OGG file already holds lossy Vorbis audio, so compressing it means re-encoding the Vorbis stream at a lower bitrate — that costs you a generation of quality, and how much headroom you have depends entirely on the source. A 320 kbps music export has room to shrink; a 96 kbps clip does not. Use this when you have to meet a hard upload or attachment cap, or to slim down long recordings and game-audio assets where some loss is acceptable. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared.
How to Compress an OGG File
- Upload Your OGG File: Drag and drop your
.oggtrack or click to browse. Batch uploads are supported, so you can shrink a folder of sound effects or voice clips in one pass. - Pick a Compression Method: Choose Variable Bitrate to set a Vorbis quality band (the dropdown ranges from 48K up to 384K), Custom Bitrate to enter an exact target like 64 or 96 kbps, Specific file size to hit an exact MB target for an email or chat cap, or File Size Percentage to shrink each file to a share of its current size.
- Tune Audio Channel, Sample Rate, and Trim (Optional): Switch Audio Channel from stereo to Mono to roughly halve a two-channel voice file, lower Audio Sample Rate for speech-only material, or use Trim to cut silence and dead air before re-encoding — trimming often saves more than dropping the bitrate.
- Compress and Download: Click "Compress" and grab each file individually or as a ZIP. No sign-up, no watermark, no email gating.
OGG Vorbis Bitrate Guide — Pick by Content Type
Vorbis encodes most efficiently in quality-based VBR mode, so the right target depends on what is in the file. The "size per hour" column is the resulting file for one hour of stereo audio; speech in mono lands well below these figures.
| Target bitrate | Size per hour | Best for | Quality notes |
|---|---|---|---|
| 192–256 kbps | ~86–115 MB | Archival music, detailed stereo masters | Effectively transparent for trained listeners; rarely worth the size |
| 128–192 kbps | ~58–86 MB | General music, podcasts with music beds | Transparent for most listeners around 160 kbps per Hydrogenaudio |
| 96–128 kbps | ~43–58 MB | Casual music, game background loops | Clean on earbuds and phone speakers; minor artefacts on critical gear |
| 64–96 kbps | ~29–43 MB | Interviews, stereo speech, mixed content | Good for spoken word; music sounds noticeably thinner |
| 48–64 kbps | ~22–29 MB | Single-voice mono — narration, voice notes | Intelligible speech; not suitable for music |
Vorbis was not designed for very low bitrates the way newer codecs are, so below roughly 48 kbps speech holds up but music degrades quickly. If your OGG is already at or below about 96 kbps, there is little headroom left — trim the recording, switch to mono, or accept that re-encoding will be audible. For the same target size, a more modern codec packs in more detail; see the conversion note in the FAQ below.
Frequently Asked Questions
Why does my OGG file barely get smaller when I compress it?
Because OGG already contains lossy Vorbis audio. If the file was encoded near its content's transparency point — roughly 128–192 kbps for music, or lower for voice — there is little redundant data left to remove, so dropping the bitrate further trades audible quality for only a modest size cut. The biggest win on an already-small file usually comes from trimming silence with the Audio Cutter or switching the Audio Channel to mono, not from re-encoding the stream again.
Does compressing an OGG file lose quality?
Yes. Vorbis is a lossy codec, so re-encoding it at a lower bitrate discards more audio data and stacks a second generation of compression artefacts on top of the first. For spoken word the loss is often inaudible down to about 48–64 kbps mono; for music the practical floor is higher, around 96–128 kbps, before cymbals and reverb tails start to smear. If you still have the original lossless or higher-bitrate source, encode straight from that instead of from the existing OGG.
What bitrate should I use for a voice recording versus music?
For a single mono voice — narration, a lecture, a voice memo — 48–64 kbps is comfortable and intelligible. For general stereo music, Hydrogenaudio's community consensus puts Vorbis transparency around 160 kbps for most listeners, so 128–192 kbps is the sweet spot; 96–128 kbps is fine for casual listening and game loops. Picking a music bitrate for a voice note just wastes space, and picking a voice bitrate for music will sound thin and hollow.
How do I hit an exact size for an email or chat upload?
Choose Specific file size and enter your target in MB; the encoder back-solves the bitrate from the clip's duration. This is handy for fitting a long recording under an attachment or message cap. Aim slightly under your target to leave room for container overhead, and remember that switching Audio Channel to mono on a stereo voice file roughly halves the size before you even touch the bitrate.
Should I convert the OGG to Opus instead of compressing it?
Often yes, if quality at a small size matters more than keeping the .ogg extension. Opus is a newer Xiph codec that packs more detail into the same number of kilobits than Vorbis, so at a given target size an Opus file usually sounds better — especially below about 96 kbps, where Vorbis was never meant to operate. Compress in place when you need the file to stay OGG/Vorbis; otherwise use OGG to Opus for better efficiency at the same size. If you only need broad device compatibility, OGG to MP3 is the safer target.
How are my files handled and how long do you keep them?
Files are uploaded over an encrypted connection, processed on xconvert's servers, and deleted automatically a few hours after conversion. The audio is never shared, never made public, and is not used to train any model — no account or email is required. In our testing, a 4-minute stereo OGG re-encoded from 256 kbps down to a 96 kbps Variable Bitrate target dropped from about 7.3 MB to 2.7 MB with no audible change on laptop speakers. To shrink a mix of formats in one job, the broader Audio Compressor handles MP3, WAV, M4A, OGG, FLAC, and Opus together.