Unlike MP3 or AAC which permanently discard inaudible frequencies, FLAC uses a reversible prediction algorithm. It models the correlation between audio samples, stores only the prediction residuals (errors), and applies entropy coding to those residuals. The result: a file 40–60% smaller than WAV that decodes identically to the original PCM — every sample, every time. The process is mathematically guaranteed to be lossless by the codec specification.
Convertisseur FLAC
Convertissez en FLAC
Compression sans perte avec qualité CD. Idéal pour archiver votre musique.
Sans perte de qualité
Métadonnées complètes
Compression 50-60%
Déposez votre fichier ici
ou parcourir
Jusqu'à 100 Mo gratuit • Format de Sortie: FLAC
En attente dans la file...
Échec de la Conversion
Échec de la Conversion
Sécurisé et Privé
Fichiers supprimés en 2h
Traitement Rapide
Pas de compte requis
Ultra Rapide
How to Convert
Convertissez n'importe quel fichier en secondes — sans logiciel, sans inscription requise.
01
Télécharger
Téléchargez votre fichier audio
02
Choisir le format
Sélectionnez le format de sortie
03
Télécharger
Obtenez votre fichier converti
Pourquoi EasyConv
Why Use EasyConv
Professional-grade conversion with features designed for real-world workflows.
Sans perte
Aucune perte de qualité lors de la conversion.
Compression intelligente
Réduisez la taille tout en maintenant la qualité.
Contrôle qualité
Ajustez les paramètres de qualité.
Métadonnées préservées
Les métadonnées et tags sont conservés.
Audiophile Standard
Used by Bandcamp, Qobuz, and high-resolution music stores worldwide — FLAC is the preferred archival and distribution format for serious listeners.
Traitement sécurisé
Les fichiers sont traités en toute sécurité.
300+ Formats
Supported Formats
Detailed breakdown of every format supported by this converter.
| Format | Description | Extension | Use Case |
|---|---|---|---|
| WAV → FLAC | Compress lossless WAV to smaller FLAC | .wav |
Archiving studio recordings, saving disk space |
| MP3 → FLAC | Wrap MP3 in FLAC container (no quality gain) | .mp3 |
Format unification of existing libraries |
| AAC → FLAC | Convert Apple AAC to open FLAC format | .aac |
Moving away from Apple ecosystem |
| AIFF → FLAC | Apple lossless to open lossless standard | .aiff |
Cross-platform archive conversion |
| OGG → FLAC | Convert Vorbis to lossless FLAC | .ogg |
Upgrading game audio archives |
| M4A → FLAC | Convert Apple M4A/ALAC to FLAC | .m4a |
iTunes library migration to open formats |
| MP4 → FLAC | Extract lossless audio from video | .mp4 |
Archiving concert video audio tracks |
3 Étapes Simples
Frequently Asked Questions
Everything you need to know about this conversion tool.
Yes. FLAC (Free Lossless Audio Codec) uses a prediction algorithm to compress audio without discarding any data. When decoded, the output is bit-for-bit identical to the original PCM audio.
No — all FLAC compression levels (0 through 8) produce identical audio quality. Higher levels take longer to encode but produce slightly smaller files. Level 5 is the default and a good balance.
Both are lossless codecs that compress audio without quality loss. FLAC is an open standard supported on virtually every platform. ALAC (Apple Lossless) is Apple's equivalent, used in .m4a files on Apple devices. Use our M4A Converter to convert between them.
No. Converting a lossy file to FLAC does not restore lost audio data. The FLAC file will contain the same audio information as the MP3 source, just stored in a lossless container. Always archive from the highest-quality source available.
FLAC is supported on Android, Windows, Linux, most hi-fi streamers (Sonos, Roon, Audirvana), Plex, VLC, and most modern DAPs (digital audio players). Apple devices support FLAC natively since iOS 11 and macOS Sierra.
A typical 3-minute stereo WAV at 44.1 kHz / 16-bit is about 30 MB. The equivalent FLAC file is typically 15–20 MB — roughly a 40–50% reduction with zero quality loss.
12M+ utilisateurs nous font confiance
Who Uses This Tool
Real-world use cases from professionals across different industries.
Music Archivist
Archive Your CD Rips Losslessly
Convert WAV CD rips to FLAC and cut archive size in half while ensuring the audio is bit-perfect for future use.
Audiophile
Build a Hi-Res Music Library
Store 24-bit / 96 kHz high-resolution music in FLAC — the format supported by Qobuz, Bandcamp, and audiophile streaming services.
Apple User
Migrate iTunes Library to Open Format
Convert M4A/ALAC files from your iTunes library to FLAC to gain cross-platform compatibility without any quality loss.
NAS / Plex User
Serve Lossless Audio on Plex or Roon
FLAC is natively supported by Plex, Roon, Jellyfin, and Audirvana — convert your WAV masters to FLAC for efficient storage on a home media server.
Bandcamp Artist
Upload Lossless for Fan Downloads
Bandcamp lets fans download in FLAC. Convert your WAV master to FLAC before uploading to offer the best lossless download option.
Film Producer
Archive Concert and Film Audio
Extract and archive the audio from concert MP4 files as FLAC — preserving the full dynamic range for documentary and archival use.
Pourquoi EasyConv
Comparaison
Voir comment nous nous comparons aux autres solutions
| Feature |
Our Tool EasyConv |
Desktop App | Other Online |
|---|---|---|---|
| Sans perte | |||
| Hi-Res 24-bit | |||
| Smaller than WAV | |||
| Métadonnées | |||
| Sans installation | |||
| Open standard | |||
| Gratuit |
Technical Specifications
Technical Specifications
Detailed technical information about our conversion engine.
Limits
- Max file size: 500 MB
- Output compression level: 5 (default)
- Multi-channel up to 8 channels
FFmpeg
FLAC
Lossless
Hi-Res
Vorbis Tags
Open Source
Engine
FFmpeg 6.x · libFLAC encoder · compression level 0–8
Qualité
Lossless up to 32-bit / 192 kHz; bit-perfect decode guaranteed
Speed
Typical encode: 5–20 seconds for a 100 MB WAV source
Security
HTTPS transfer · isolated temp dir · auto-purged in 2 h
Codec
FLAC (libFLAC)
Size vs WAV
40–60% smaller
Max Res
32-bit / 192 kHz
Auto-Delete
2 hours
Guide complet
FLAC: The Audiophile Archive Format
FLAC (Free Lossless Audio Codec) occupies a unique position in digital audio: it combines the absolute quality of uncompressed PCM with the storage efficiency of compression. For anyone serious about preserving music in its original form, FLAC is the definitive choice for digital audio archives.
How FLAC Compression Works
FLAC Compression Levels: Which Should You Choose?
FLAC offers compression levels 0 through 8. Contrary to intuition, the level never affects audio quality — all levels produce bit-perfect output. The only difference is encode/decode speed and resulting file size. Level 0 is fastest with the largest output; level 8 is slowest with the smallest. Level 5 is the widely used default: it compresses well and completes quickly enough for large libraries. For encoding thousands of files, level 3 or 4 is a practical compromise.
FLAC vs ALAC: Choosing Between Open and Apple
FLAC and Apple Lossless (ALAC) are both lossless codecs with equivalent audio quality. The key differences are ecosystem and openness. FLAC is an open standard maintained by the Xiph.Org Foundation, supported on Linux, Android, Windows, most hi-fi hardware, and (since iOS 11) Apple devices. ALAC is Apple's proprietary format stored in M4A containers — well supported in the Apple ecosystem but less universal. If you are not locked into Apple hardware, FLAC is the better long-term choice.
Metadata with FLAC: Vorbis Comment Tags
FLAC uses the Vorbis Comment standard for metadata, which is flexible and extensible. Beyond the standard tags (TITLE, ARTIST, ALBUM, DATE, TRACKNUMBER, GENRE), you can store LYRICS, REPLAYGAIN values, ISRC codes, and completely custom fields. Applications like MusicBrainz Picard, beets, and foobar2000 have full Vorbis Comment support and can automatically tag large FLAC libraries from online databases.
Building a FLAC Archive: Practical Recommendations
A well-organised FLAC library should follow consistent conventions: one album per folder, files named TrackNumber - Title.flac, embedded album art at 600×600 pixels or larger, and a separate cover.jpg in each folder for media server compatibility. Always keep your original WAV or CD rip — use FLAC as the archive format, and generate lossy copies (AAC 256k, MP3 320k) as needed for portable devices. A lossless archive is only valuable if you can always re-derive other formats from it.