Ultra Fast Audio Converter & Editor
Convert between any audio format vice versa in your browser. Real digital signal processing, sample rate mastering, volume gain, and full batch export.
Drag & Drop your audio files here, or
Tap to select audio files from your device
Supports MP3, WAV, M4A, FLAC, AAC, OGG, OPUS, WMA, AIFF, ALAC, AMR, AC3, M4B, M4R, WEBA, OGA, CAF, AIF, MP2, W64, AIFC, AU, SND, GSM, DSS, VOC, AVR
How It Works
Convert your audio streams securely in three simple steps.
Select From & To Formats
Choose any of the 27 formats (MP3, WAV, FLAC, AAC, AIFF, OGG, OPUS, WMA, AU, etc.) and reverse them anytime with the swap button.
Fine-Tune Quality Parameters
Customize bitrates up to 320kbps, adjust sample rates (up to 48kHz), force stereo/mono, or apply volume boost and trim.
Instant In-Browser Synthesis
Your audio is processed locally using Web Audio API and exported directly to your computer with zero upload delay.
Supported Audio Containers & Codecs
Full technical breakdown of all 27 supported audio file extensions, ordered from most common to specialized.
MPEG-1 Audio Layer III
The world's most widely supported audio format using LAME perceptual compression. Built for universal music playback, podcasts, and mobile devices.
Waveform Audio File
Microsoft & IBM RIFF container storing raw 16-bit Little-Endian Linear PCM samples. Uncompressed studio master quality for DAWs and audio mastering.
Advanced Audio Coding & ISO MP4
High-efficiency perceptual audio in ADTS (.aac) and ISO BMFF containers for Apple Music (.m4a), audiobooks (.m4b), and iPhone ringtones (.m4r).
Free Lossless Audio Codec
RFC 9639 bit-exact lossless compression using linear prediction and Rice coding with CRC-8/CRC-16 frame verification for audiophile archiving.
Xiph Ogg, IETF Opus & WebM Audio
Modern open-standard containers encapsulating low-latency RFC 6716 Opus and Ogg FLAC streams with CRC-32 page verification and Matroska WebM muxing.
Windows Media Audio
Microsoft Advanced Systems Format (ASF) container with official binary GUID headers and 4-bit adaptive differential pulse-code modulation.
Audio Interchange File Format
Apple Macintosh native EA IFF 85 audio standard storing 16-bit Big-Endian Linear PCM samples with 80-bit IEEE 754 extended sample rate precision.
Apple Lossless Audio Codec
Apple's native bit-exact lossless audio format stored inside an ISO BMFF container with a dedicated 36-byte ALAC magic cookie descriptor box.
Dolby Digital & MPEG-1 Layer II
ATSC A/52 Dolby Digital (.ac3) frames with dual CRC-16 verification for home theater, alongside ISO/IEC 11172-3 Layer II (.mp2) for radio and TV broadcast.
Apple Core Audio & Sony Wave64
Next-generation 64-bit studio containers (.caf and .w64) engineered to overcome the 4GB file size ceiling of traditional 32-bit WAV and AIFF masters.
Speech & Dictation Codecs
Dedicated narrowband speech formats including 3GPP AMR-NB (.amr), ETSI GSM 06.10 Full Rate (.gsm), and Olympus Digital Speech Standard (.dss).
Classic Workstation & Sampler Audio
Includes Sun/NeXT (.au/.snd) 24-byte PCM, Creative Sound Blaster Voice (.voc) Block 9 audio, and Audio Visual Research 2BIT (.avr) hardware sampler files.
Audio Format Comparison
Direct breakdown of compression type, bandwidth, and fidelity across all 27 supported formats.
| Format | Compression | Fidelity Level | Avg Size (3-min song) | Platform Compatibility |
|---|---|---|---|---|
| MP3 | Lossy (Psychoacoustic LAME) | High (64–320 kbps) | ~3 MB - 7 MB | Universal (100% Devices) |
| WAV | Uncompressed (16-bit LE PCM) | Studio Master (100%) | ~30 MB - 50 MB | Universal (Windows/Mac/DAW) |
| M4A / AAC / M4B / M4R | Lossy (Advanced Audio / ISO MP4) | Superior to MP3 at equal kbps | ~3 MB - 6 MB | Apple / iOS / Web / Audiobooks |
| FLAC | Lossless (LPC + Rice Coding) | Bit-for-Bit Exact (CRC Verified) | ~18 MB - 25 MB | Audiophile / Modern OS |
| OGG / OGA | Lossless / Xiph Ogg Container | Bit-Exact Ogg FLAC / Ogg Audio | ~18 MB - 25 MB | Web / Gaming / Desktop OS |
| OPUS / WEBA | Lossy (IETF Opus / WebM EBML) | Ultra-Low Latency High Fidelity | ~2.5 MB - 5 MB | Modern Browsers / Streaming |
| WMA | Lossy (Microsoft ASF / ADPCM) | 4:1 Adaptive Differential PCM | ~7 MB - 12 MB | Windows Media / Legacy PC |
| AIFF / AIF / AIFC | Uncompressed (16-bit BE PCM) | Studio Master (100%) | ~30 MB - 50 MB | Apple / macOS / Logic Pro |
| ALAC | Lossless (Apple ISO BMFF) | Bit-for-Bit Exact (Apple Master) | ~25 MB - 32 MB | Apple Music / iOS / macOS |
| AC3 / MP2 | Lossy (Dolby A/52 & MPEG Layer II) | Broadcast & Cinema Standard | ~2.5 MB - 6 MB | Home Theater / TV / Radio |
| CAF / W64 | Uncompressed (64-Bit Master PCM) | Studio Master (>4GB Support) | ~30 MB - 50 MB | Pro DAWs / Logic / Reaper |
| AMR / GSM / DSS | Lossy (Narrowband Speech Codecs) | Voice & Dictation (8–11 kHz) | ~0.3 MB - 1.2 MB | Telephony / Dictation Hardware |
| AU / SND / VOC / AVR | Uncompressed (Linear PCM) | Workstation & Hardware Sampler | ~30 MB - 50 MB | Unix / Java / Hardware Samplers |
Popular Audio Conversions
Select any format pair below to open its dedicated converter URL with the source and target formats pre-configured.
Frequently Asked Questions
Everything you need to know about CriticShift audio conversion.