CONVERT
MP3 → WAV
Tap to choose your fileDRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 25 MB · Free plan · No signup required
Convert to:
Detecting available formats...
Optimize for
Leave empty to use original name. Extension added automatically.
Uploading...
Processing your file...
Convert MP3 to uncompressed WAV for audio editing and production.
Converting MP3 to WAV decodes a compressed, lossy file back into raw uncompressed PCM audio wrapped in a RIFF container. People reach for this almost always to feed an MP3 into something that refuses to work with compressed audio: a DAW like Pro Tools or Logic that wants linear PCM on the timeline, a CD-authoring tool that expects 16-bit/44.1 kHz stereo, a sampler, a broadcast system, or a hardware unit with no MP3 decoder on board. WAV gives you a sample-accurate, decode-free file that opens instantly and edits without an extra compression layer underneath. The honest caveat: this does not restore audio quality. MP3 already discarded data the encoder judged inaudible, and decoding to WAV cannot bring it back — you get a faithful, bit-for-bit playback of the MP3's decoded output, not the original master. Drop your MP3 into the uploader above and KaijuConverter decodes it server-side; your source file is never altered, and both files are deleted automatically within an hour.
MP3 Audio
Source formatMP3 is the most widely recognized audio format in the world. It uses lossy compression to dramatically reduce file sizes while maintaining good perceived audio quality, making it the standard for music distribution.
WAV Audio
Target formatWAV is an uncompressed audio format that preserves full audio fidelity. Files are large but provide lossless, CD-quality sound. It is the standard working format in audio production and editing.
Why convert MP3 to WAV
MP3 stores audio as a stream of psychoacoustically compressed frames — most editors and hardware would need to decode every frame before they can scrub, cut or process it. WAV is already decoded: plain interleaved PCM samples a DAW, sampler or CD burner can read directly, with no per-frame latency and no encoder padding at the head and tail to throw off your edit points. You convert to WAV when a tool demands uncompressed input, when you need frame-accurate editing, or when you want a working copy that won't pick up a second round of lossy compression every time you save.
HOW TO CONVERT
MP3 → WAV
Upload the MP3
Drop your .mp3 file. We read the bitrate, sample rate, and channel layout.
Decode to PCM
FFmpeg decodes the MP3 frames to 16-bit PCM at the original sample rate — no resampling artefacts.
Download the WAV
Expect the file to be about 10× larger than the MP3 — that is the nature of uncompressed audio.
Common Use Cases
Audio editing in DAWs
Pro Tools, Logic, and Reaper prefer WAV for instant waveform scrubbing without decode overhead.
Video editing soundtracks
Premiere, Final Cut, and DaVinci Resolve ingest WAV with no frame-accuracy issues.
CD authoring
Red Book audio CDs require 44.1 kHz 16-bit WAV — MP3 has to be decoded first anyway.
Broadcast delivery
Radio stations and podcast networks often mandate WAV masters to avoid double-compression.
MP3 vs WAV — Strengths and limitations
What each format does best, and where it falls short.
MP3 Strengths
- Universal support — every device, every player, every car stereo.
- Small file sizes with acceptable quality at 128–320 kbps.
- Completely royalty-free since April 2017.
- ID3 metadata tags support artist, album, cover art, lyrics, and more.
- Efficient decoding — runs on the most basic hardware.
Limitations
- Lossy — re-encoding compounds quality loss.
- Outperformed by AAC, Opus, and OGG at equivalent bitrates.
- Pre-echo artifacts on sharp percussive sounds.
WAV Strengths
- Bit-perfect, uncompressed audio — the professional studio standard.
- Universally supported for playback, editing, and analysis.
- No re-encoding penalty — edit and save repeatedly with zero quality loss.
- Simple internal structure — easy to parse programmatically.
- Supports up to 32-bit float and 384 kHz sample rates.
Limitations
- Enormous file sizes — 10 MB per minute for CD-quality stereo.
- 4 GB size limit for standard WAV (RF64/W64 variants extend it but break compatibility).
- No native support for cover art or rich metadata.
MP3 vs WAV — Technical specifications
Side-by-side comparison of the technical details.
MP3
- MIME type
- audio/mpeg
- Compression
- Lossy — perceptual coding based on psychoacoustic model
- Sample rates
- 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz
- Bitrates
- 32–320 kbps (CBR) or VBR
- Channels
- Mono or stereo only
- Metadata
- ID3v1, ID3v2
WAV
- MIME type
- audio/wav
- Container
- RIFF
- Typical codec
- PCM (uncompressed)
- Bit depth
- 8, 16, 24, 32 bit integer or float
- Sample rate
- Up to 384 kHz
- Max size
- 4 GB (standard WAV), unlimited (RF64 / W64)
| Specification | MP3 | WAV |
|---|---|---|
| MIME type | audio/mpeg | audio/wav |
| Compression | Lossy — perceptual coding based on psychoacoustic model | — |
| Sample rates | 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz | — |
| Bitrates | 32–320 kbps (CBR) or VBR | — |
| Channels | Mono or stereo only | — |
| Metadata | ID3v1, ID3v2 | — |
| Container | — | RIFF |
| Typical codec | — | PCM (uncompressed) |
| Bit depth | — | 8, 16, 24, 32 bit integer or float |
| Sample rate | — | Up to 384 kHz |
| Max size | — | 4 GB (standard WAV), unlimited (RF64 / W64) |
MP3 vs WAV — Typical file sizes
Approximate file sizes for common scenarios.
MP3
- Song at 128 kbps (4 min) 3.8 MB
- Song at 320 kbps (4 min) 9.5 MB
- Podcast (1 hour, 96 kbps) 42 MB
- Audiobook (8 hours, 64 kbps) 220 MB
WAV
- Song (4 min, CD quality) 40 MB
- Voice memo (1 min, 16-bit 44.1 kHz) 10 MB
- Studio master (1 min, 24-bit 96 kHz) 33 MB
- Field recording (1 hour, 24-bit 48 kHz) 1 GB
Quality & Compatibility
This conversion is lossless only in the narrow sense that WAV preserves the MP3's decoded output exactly — it cannot recover detail MP3 already threw away. Whatever the encoder removed (typically content above a 16–19 kHz lowpass at common bitrates, plus masked frequencies) stays gone. Output is standard LPCM, usually 16-bit/44.1 kHz stereo matching the source sample rate. Expect the file to grow roughly tenfold: a 4 MB MP3 becomes about 40 MB. WAV's metadata is minimal, so ID3 tags (artist, album, cover art) are dropped — only basic RIFF INFO fields survive.
Tips for Best Results
- Match the WAV's sample rate to your project (44.1 kHz for CD/most music, 48 kHz for video) so your DAW doesn't resample it again on import.
- Don't re-encode the WAV back to MP3 after editing unless you have to — each MP3 round-trip stacks fresh compression artefacts on top of the originals.
- Because WAV strips ID3 tags, copy down the artist/title/cover art before converting if you need them, since the output won't carry that metadata.
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
No. MP3 encoding discards information permanently; decoding to WAV reproduces exactly what the MP3 contains, no more. The benefit is editability and compatibility, not fidelity.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for WAV and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
WAV stores uncompressed PCM audio — roughly 10 MB per minute at CD quality. MP3 compressed that by 10× on average. Larger WAV size is the expected trade-off for editability.
Yes. Title, artist, album, year and cover art travel from the MP3 container to the WAV container automatically where both formats support them. If a tag field has no WAV equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
Yes. Default is the MP3 source sample rate at 16-bit, which is optimal. Upsampling to 24-bit or 48 kHz adds no real quality but may be required by specific DAW projects.
Yes if it is 44.1 kHz, 16-bit, stereo — the Red Book standard. Most burning software will convert other rates automatically.
RELATED CONVERSIONS
Other popular pairs involving MP3 or WAV
More from MP3
More ways to reach WAV
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
MP3 Audio Format: The Complete Technical Guide
Deep dive into MP3: MPEG Layer III bitstream structure, psychoacoustic model, MDCT, Huffman coding, VBR vs CBR, ID3 tags, LAME encoder commands, and how MP3 compares to AAC, Opus, and FLAC.
Read guideWAV/PCM Audio Format: The Lossless Audio Foundation
Complete guide to WAV PCM audio format: RIFF chunk structure, pulse code modulation explained, bit depth 16/24/32-bit, sample rates, WAVE_FORMAT_EXTENSIBLE, file size calculations, and ffmpeg/SoX commands.
Read guideWAV Audio Format: The Complete Technical Guide
Everything about WAV format: RIFF chunk structure, PCM encoding, bit depths (8/16/24/32-bit), sample rates, broadcast BWF extension, dithering, and WAV vs FLAC vs AIFF.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.