AIFF to OGA Converter

AIFF vs OGA: Which Should You Convert To?

AIFF is Apple's uncompressed PCM format — perfect fidelity, roughly 10.6 MB a minute, and no compression of any kind. OGA is the Xiph.Org Ogg container carrying compressed audio, normally Vorbis. The short answer: convert to OGA when the file has to be small, royalty-free and playable on the open web or in a game engine, and keep the AIFF when it is a master you will edit again. The interesting decision on this page is not really AIFF versus OGA — it is which codec the Ogg container should carry, because .oga can hold four of them and they are not interchangeable.

Side-by-side Comparison

Which Codec Should the OGA Carry?

The Audio Codec dropdown on this page decides what actually goes inside the Ogg container. Vorbis is the default and the safe choice; the others are for specific jobs.

When to Convert to OGA

• Web and game audio. Ogg Vorbis has no patent-licensing burden, which is why it became the default sound format in a generation of game engines and open-source projects.
• You need a big library to shrink. A 128 kbps Vorbis file is roughly an eleventh the size of the AIFF it came from, and Vorbis holds up well against MP3 at the same rate.
• The audio will be streamed or seeked. Ogg pages carry granule positions, so players can seek accurately in a long file without an external index.
• You want rich tags. Vorbis comments are free-form Unicode key/value pairs, with no fixed field list to fight against.

When to Keep the AIFF

• It is a master. Every lossy encode is one-way; edit and mix from the AIFF, then export the OGA at the end.
• The destination is an Apple-only workflow. Logic, Final Cut and the rest read AIFF natively; Ogg support on Apple platforms only became broad recently and remains uneven outside the browser.
• You need lossless but universal. A plain FLAC file gets you lossless compression that more software recognises than Ogg FLAC does.
• Bit depth matters. AIFF carries 24- and 32-bit samples; a lossy Ogg codec discards the concept of bit depth entirely.

How to Convert AIFF to OGA

1. Upload Your AIFF File: Drag .aif or .aiff files onto the page or click "+ Add Files". Several files can be queued under one set of settings.
2. Choose the Audio Codec: Vorbis is the default; switch to Opus for better quality at low bitrates, FLAC for a lossless Ogg, or Speex only if a legacy voice tool demands it.
3. Set the Quality or Bitrate: In File Compression, use the Preset dropdown, or switch to Variable Bitrate for efficiency, Constant Bitrate (128 kbps by default) when a target needs a fixed rate, or Specific file size to work backwards from a size budget. Audio Channel, Audio Sample Rate and Trim sit on the same panel.
4. Convert and Download: Click Convert and save the .oga. No sign-up, no watermark.

Frequently Asked Questions

Should the file be called .oga or .ogg?

RFC 5334 draws the line clearly: .ogg is reserved for Ogg files that contain nothing but a Vorbis bitstream, while .oga is the general extension for Ogg audio of any kind. Both are served as audio/ogg. In practice a Vorbis file works under either name, so if a player or upload form only recognises .ogg, renaming a Vorbis .oga is legitimate — but do not rename an Opus or FLAC Ogg that way, because tools that assume .ogg means Vorbis may reject it.

Will converting AIFF to OGA lose quality?

With Vorbis, Opus or Speex, yes — they are lossy codecs and the discarded detail cannot be recovered by converting back. At 160-192 kbps Vorbis the difference is very hard to hear on music. If you need the samples intact, choose FLAC in the Audio Codec dropdown: it compresses losslessly, typically to about half the AIFF's size, with the audio bit-identical when decoded.

How much smaller will the OGA be?

At the page's 128 kbps default the arithmetic is direct: 128,000 ÷ 8 = 16,000 bytes per second, so three minutes is about 2.9 MB against roughly 31.8 MB for the same audio as 44.1 kHz 16-bit stereo AIFF — about an eleven-fold reduction. Variable bitrate moves that figure up or down a little depending on the material, since it spends more bits on dense passages.

Is Opus better than Vorbis, and should I just use it?

Opus generally wins on quality per bit, particularly below about 96 kbps, and it handles speech and music equally well — it is the newer design and was standardised by the IETF in 2012. The catch is recognition: Ogg Opus is normally distributed as .opus, and some older Ogg tools expect Vorbis when they see an Ogg audio file. Choose Opus when you control the playback software, Vorbis when you do not.

Will my 44.1 kHz source stay at 44.1 kHz?

With Vorbis and FLAC, yes — leave Audio Sample Rate on ORIGINAL and the rate carries through. Opus is different by design: it always runs its internal machinery at 48 kHz and records the original rate in its header, so a 44.1 kHz source is resampled during encoding. That is normal Opus behaviour, not a fault in the conversion.

Do my AIFF tags and markers survive?

Text metadata can map onto Vorbis comments, the free-form FIELD=value tag block that Ogg files use, so a title or author has somewhere to go. AIFF-specific structures do not: markers, instrument chunks and loop points have no representation in Ogg and are dropped. Keep the AIFF if you rely on them.

Can I put a .oga straight into a web page?

Yes, with one caveat. <audio src="track.oga"> works in Chrome, Firefox, Edge and Opera and has for many years, and Safari reached full Ogg Vorbis support in version 18.4 — but visitors on older Safari and iOS releases will get silence. The usual fix is to offer a second <source> in MP3 or AAC alongside the Ogg one.

Why does the Ogg file have slightly odd length or seek behaviour in some apps?

Ogg stores timing as granule positions inside self-delimiting pages rather than in a fixed index at the front of the file, which is what makes it good for streaming. Some players estimate duration from the last page they can find, so a file that has been truncated or partially downloaded may report an odd length. Re-encoding a complete source, as this page does, produces a clean granule sequence.

Are my files private when I convert them here?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.

If your target actually expects the Vorbis-only extension, AIFF to OGG writes the same audio under .ogg; for a standalone Opus file, use AIFF to Opus.