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WAV · FLAC · M4A · MP3 · OGG

Compress the audio for where it goes next.

Open one common audio file, choose MP3 for broad delivery or OGG for an open workflow, then set bitrate or a size cap. Encoding stays on your device.

Build an output
WAVFLACM4AMP3OGG
→
MP3OGG
One source in; one measured delivery copy out.

FORMAT + RATE + CHANNELS

A compressor is also a delivery decision.

Lossless sources usually have the most room to shrink. A lossy source is decoded and encoded again; choose the destination format deliberately rather than assuming every smaller file is equivalent.

1
SOURCE

Choose one audio file

2
DELIVERY

Choose the output contract

Output format
Compression control
3296 voice160 mixed320
ESTIMATED DELIVERYAdd audio to estimate

The completed output is measured again.

3
MEASURE

Verify the handoff file

Playback, measured bytes, and output settings will appear here.

Choose a source file to begin.

PRIVATE

The source and result stay in this browser tab. ToolMerit serves the encoder but never receives your audio.

FIRST QUESTION

Do you need a smaller delivery copy or a smaller lossless archive? This browser tool makes lossy MP3 or OGG outputs. Keep WAV or FLAC when exact source recovery matters.

FORMAT ROUTER

Pick the receiver before the codec.

Compatibility statements are broad planning guidance, not a substitute for testing the exact app, browser, CMS, game engine, or device that will receive the file.

MP3

Broad single-file delivery

Prefer MP3 when a form, customer, player, or mixed device audience needs a familiar audio file and no modern codec has been agreed.

Best default for uncertain receivers.
OGG / VORBIS

Open web and app pipelines

Prefer OGG when the destination explicitly supports Vorbis, or an open game/application asset pipeline already standardizes on it.

Verify Apple and embedded targets.
KEEP SOURCE

Editing and future exports

Preserve WAV, AIFF, or FLAC as the master. Generate every later lossy version from that source rather than transcoding delivery copies.

Lossless source first.

WHAT SHRINKS—AND WHY

The same output setting means different risk.

WAV / AIFFUncompressed → lossy

Usually the largest reduction. Keep the source separately.

FLACLossless → lossy

Large reduction, but the new delivery file cannot reconstruct the FLAC.

M4A / AACLossy → lossy

Another generation; use only when the receiving system needs MP3 or OGG.

MP3 / OGGLossy → lossy

Lower bitrate can save space, but compounding artifacts is the main tradeoff.

A 4-PASS LISTENING TEST

Use one difficult excerpt.

  1. 01Choose speech sibilants, cymbals, applause, ambience, or a dense chorus.
  2. 02Start at 96 kbps mono for speech or 160 kbps stereo for mixed/music delivery.
  3. 03A/B the same passage at matched playback volume.
  4. 04Keep the lowest rate that passes both listening and the receiver’s size limit.

AUDIO COMPRESSION ANSWERS

Before you discard any source.

Does this make every audio format smaller?+

It creates a lossy MP3 or OGG delivery copy. Uncompressed and lossless sources usually shrink substantially. A low-rate lossy source may become larger or worse; keep the original when that happens.

Can I hit an exact target size?+

The tool derives a bitrate from duration and leaves a small margin, but container headers, tags, and encoder behavior still move the result. Verify the measured output.

Why not offer “quality percentage”?+

A percentage hides what changed and does not map consistently across source formats. Bitrate, duration, channels, and destination format provide a more auditable plan.

Should voice be mono?+

Often, when both channels contain the same centered speech. Keep stereo when channels contain different speakers, spatial cues, music, or ambience that matters.

Are tags and artwork preserved?+

This page focuses on the audio stream and does not promise cross-format metadata or artwork preservation. Keep the source and use a metadata editor for a library workflow.

Is this the MP3-only compressor?+

No. If your input and required output are both MP3, use the dedicated MP3 file compressor for compatible-tag controls and source-rate warnings.

RELATED AUDIO ROUTES

Convert only when the destination calls for it.

MP3 → MP3Use the dedicated MP3 compressor →WAV → OGGUse quality-based Vorbis controls →ALL UTILITIESBrowse ToolMerit free tools →

Format guidance references current MDN audio codec documentation; local encoding uses FFmpeg.wasm.