CONVERT FLAC → W64 (FLAC to W64)
Fast, secure FLAC to W64 conversion. No registration required.
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HOW TO CONVERT FLAC → W64
Provide the audio file
Drag the FLAC onto the uploader. Files up to 25 MB run on the free tier without registration; paid plans go up to 2 GB.
ffmpeg handles the conversion
Our ffmpeg-based pipeline reads sample rate and channel layout, then writes a matching W64 with ID3 tags intact.
Save the output
Click to download the W64. Batch uploads are bundled into a ZIP for single-click retrieval.
FLAC is the Free Lossless Audio Codec, offering 40–60% compression with zero quality loss. That is why users land on this page looking for a W64 copy. A FLAC to W64 conversion is typically about compatibility: some players refuse FLAC, many accept W64. The audio payload makes the round trip with minimal artefacts when bitrate is left at sensible defaults. Drop a FLAC file into the uploader and the W64 comes back in seconds. Context: FLAC is the Free Lossless Audio Codec, offering 40–60% compression with zero quality loss. W64 is an audio format with specific trade-offs between file size, bitrate flexibility, and device support.
Why convert FLAC to W64
Moving from FLAC to W64 usually buys compatibility or a friendlier file size. For spoken-word content the difference is inaudible; for high-resolution music pick the highest bitrate the W64 codec supports to avoid compounding compression.
FLAC vs W64 — Technical specifications
Side-by-side comparison of the technical details.
FLAC
- MIME type
- audio/flac
- Extension
- .flac
- Standard
- Open-source reference implementation (Xiph.Org)
- Max bit depth
- 32 bits per sample
- Max sample rate
- 655 350 Hz
- Max channels
- 8
- MIME Type
- audio/flac
- Category
- Audio Files
- Full Name
- FLAC Audio
- Conversion Engine
- FFMPEG
W64
- MIME type
- audio/x-w64
- Extension
- .w64
- MIME Type
- audio/x-w64
- Category
- Audio Files
- Full Name
- Sony Wave64
- Conversion Engine
- FFMPEG
- Max size
- 2^64 bytes
- Relative
- RF64 (EBU 64-bit WAV)
| Specification | FLAC | W64 |
|---|---|---|
| MIME type | audio/flac | audio/x-w64 |
| Extension | .flac | .w64 |
| Standard | Open-source reference implementation (Xiph.Org) | — |
| Max bit depth | 32 bits per sample | — |
| Max sample rate | 655 350 Hz | — |
| Max channels | 8 | — |
| MIME Type | audio/flac | audio/x-w64 |
| Category | Audio Files | Audio Files |
| Full Name | FLAC Audio | Sony Wave64 |
| Conversion Engine | FFMPEG | FFMPEG |
| Max size | — | 2^64 bytes |
| Relative | — | RF64 (EBU 64-bit WAV) |
FLAC vs W64 — Strengths and limitations
What each format does best, and where it falls short.
FLAC Strengths
- Lossless — decoded audio is bit-exact identical to the source.
- 40-60% smaller than uncompressed WAV/AIFF.
- Free, patent-free, open-source reference implementation.
- Built-in error detection via MD5 checksums.
- Streaming-friendly — seek tables let you jump to any timestamp instantly.
Limitations
- File sizes still large compared to lossy codecs (5-10× bigger than AAC for same audio).
- Not suitable for low-bandwidth scenarios like streaming on mobile data.
- Older MP3 players and car stereos may not decode FLAC.
W64 Strengths
- Unlimited file size (64-bit chunks).
- Professional DAW compatibility.
- Bit-exact lossless.
Limitations
- Less universal than WAV.
- Niche — only matters for very large sessions.
- Competes with RF64.
Quality & Compatibility
Sample rate, channel layout and bit depth are preserved by default: a 44.1 kHz stereo FLAC becomes a 44.1 kHz stereo W64. Metadata — title, artist, album, cover art — travels where both formats support it. Protected DRM content cannot be converted legally and is rejected.
Tips for Best Results
- Check the podcast host specification before choosing bitrate — some mandate CBR 64 kbps, others accept VBR up to 192 kbps.
- Preserve ID3 tags by editing them before conversion; Mp3tag and MusicBrainz Picard handle round-tripping cleanly.
- If the FLAC is 24-bit studio audio, the W64 at 16-bit is sufficient for listening; higher is wasted on consumer playback gear.
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.
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 W64 and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the FLAC container to the W64 container automatically where both formats support them. If a tag field has no W64 equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
FLAC Audio
Source formatFLAC is an open-source lossless audio codec that compresses audio to roughly 50-60% of its original size without any quality loss. It is the preferred format for audiophiles and music archival.
Sony Wave64
Target formatWave64 (W64) is an extension of the WAV format developed by Sony that breaks the 4 GB file size limit of standard WAV by using 64-bit chunk sizes. It is used in professional audio production for very long or multi-channel recordings.
Going the other way? Convert W64 back to FLAC with the same engine.
Common Use Cases
Share across platforms
Send W64 files to anyone without worrying about whether they have the right software for FLAC.
Embed in documents
Drop W64 output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
W64 often produces smaller files than FLAC for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
FLAC vs W64 — Typical file sizes
Approximate file sizes for common scenarios.
- 3-min song (CD quality) 20-30 MB
- Full album (10 tracks, CD) 250-400 MB
- 3-min song (hi-res 24-bit/96 kHz) 80-120 MB
- 1-hour 24-bit 48 kHz mono ~620 MB
- 48-hour field recording ~30 GB
Lossless 24-bit Hi-Res Audio or Full Discographies?
Converting pristine FLAC/ALAC collections while preserving 192kHz master dynamics without exhausting mobile bandwidth? Dedicated multi-threaded workstation converters handle entire folders instantly.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Lossless batch chain processing preserving full ID3v2 metadata tags and embedded artwork.
Multi-CPU discography conversion with AccurateRip CRC verification and DSP mastering.
Related comparisons
See these formats side by side to understand which fits your use case best.
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