WAV vs FLAC: What's the Difference?

Use PCM WAV for recording and editing handoffs; use FLAC for a smaller lossless listening library when your software supports it. WAV and FLAC can represent the same audio samples. The usual differences are compression, storage, metadata handling, and the requirements of your next application.

Before converting a folder, decide what you need to preserve. Audio samples, album tags, artwork, and recording-session information are separate things. A lossless audio copy is not necessarily a complete replacement for the original file.

What is WAV?

WAV, also called WAVE, is an audio container commonly used with uncompressed pulse-code modulation, or PCM. PCM stores a sequence of sample values. Sample rate, bit depth, channel count, and duration determine the size of that audio data.

WAV is not always uncompressed: its format information can identify other encodings. Microsoft’s WAVE format documentation distinguishes PCM from other format tags. In this article, “PCM WAV” means the common uncompressed case, not every possible WAV file.

What is FLAC?

FLAC stands for Free Lossless Audio Codec. It compresses audio so that decoding can recover the encoded PCM samples exactly. It does not improve a recording or create detail absent from the source. The FLAC documentation provides the format and tool references.

A .flac file is convenient when you want lossless audio without the storage requirements of uncompressed PCM. The receiving player or editor still needs FLAC support.

WAV vs FLAC at a glance

Consideration	PCM WAV	FLAC
Audio samples	Stored without lossy compression	Recovered exactly from lossless compression
File size	Predictable from PCM settings and duration	Content-dependent; often smaller
Recording and editing	Common working and exchange format	Useful if the editor accepts it
Listening libraries	Can work, but takes more space	Useful for compact lossless collections
Metadata	Support varies by application and WAV chunks	Supports tags and artwork; converter behavior varies
Compression setting	Not applicable to uncompressed PCM	Trades encoding effort and size, not fidelity
FormatPlease output	16-bit or 24-bit PCM WAV	Lossless FLAC; tags and artwork omitted

Audio quality: can you hear a difference?

When WAV and FLAC decode to identical samples and pass through the same playback processing, the format alone does not give one a sound-quality advantage. A comparison between different masters, volume levels, or playback settings cannot isolate the file format.

If you hear a change after conversion, check whether the sample rate or channels changed, whether WAV bit depth was reduced, and whether the player applies different processing. A larger output file is not evidence of improved sound.

Lossless compression and file size

FLAC’s compression level affects encoding effort and potentially file size. It is not a quality slider. FormatPlease offers Fast, Balanced, and Maximum compression; all use the same lossless codec. The FLAC FAQ explains why compression effectiveness varies with the signal.

As a calculated example, one minute of 44.1 kHz, 16-bit stereo PCM contains 44,100 × 16 × 2 × 60 ÷ 8 = 10,584,000 bytes of audio, about 10.6 MB before the WAV header and metadata. A FLAC made from those samples has no single predictable size. Silence and complex recordings compress differently, so use your actual material for storage planning.

Compatibility and editing

Choose the format your editor, recorder, or collaborator requests. PCM WAV is a practical exchange file when a project specifies sample rate and bit depth. FLAC is suitable when every application in the workflow can import it; decoding lossless audio does not itself add a lossy generation.

For active projects, keep session files and source recordings together. A standalone audio export does not preserve edits, effects settings, or project references. If a collaborator asks for WAV, use FLAC to WAV, retain the original sample rate and channels, and choose a bit depth at least as high as the supported source.

Music libraries and archiving

FLAC can reduce storage needs while retaining the encoded audio samples. It also supports library metadata, but that is a format capability, not a promise that every converter preserves tags. FormatPlease omits tags and artwork. WAV recordings can also carry application-specific information that a new audio export does not retain.

For an archive, keep a backup of the original before testing any conversion workflow. Check track names, duration, channel layout, playback, and needed metadata. Sample preservation alone is not enough to establish that an entire recording archive has been preserved.

When to use WAV

Use PCM WAV when recording, sending audio to an editor that requests it, or delivering a final mix with specified PCM settings. Keep the original WAV if it contains recording information your workflow needs. If storage is acceptable and the file already works, there may be no reason to convert it.

When to use FLAC

Use FLAC for supported lossless listening libraries, compact copies of PCM recordings, or transfers between applications that accept it. Keep a separate working WAV if your editor requires one. Do not convert a lossy source to FLAC expecting it to regain missing detail; see FLAC vs MP3 for that distinction.

How to convert WAV to FLAC

1. Open WAV to FLAC and choose your PCM WAV file.
2. Keep sample rate and channels set to Original when preserving supported samples. Choose a compression level based on size and encoding time.
3. Convert, download, and check the file in your intended application. Keep the source if you need its tags, artwork, or other metadata.

The Universal Audio Converter also accepts supported FLAC, Ogg Vorbis, and Opus inputs. Current input limits are 32 MiB per file, 10 minutes, and 64 MiB of decoded PCM; available memory can impose tighter limits. Supported WAV/FLAC inputs are mono or stereo at 8, 16, or 24 bits, not floating-point or multichannel recordings.

Audio conversion runs locally in your browser. The engine and other site resources can make network requests, but your selected audio is not uploaded for conversion. See how to verify local processing if you want to inspect that behavior.