Yes, 100% free and private. All audio processing happens directly in your browser using the Web Audio API. Your files are never uploaded to any server — everything is processed locally on your device. This means complete privacy, no file size restrictions imposed by servers, and you can even use the tool offline once the page is loaded. Your audio stays on your computer at all times.

Lossless formats (WAV, FLAC, AIFF) preserve 100% of the original audio data — no quality is lost. They're ideal for archiving, professional editing, and audiophile listening. File sizes are larger (WAV: ~10 MB/minute for CD quality).

Lossy formats (MP3, AAC, OGG) use psychoacoustic compression to reduce file size by removing sounds less audible to human ears. At higher bitrates (256-320 kbps), the difference is nearly imperceptible to most listeners. MP3 at 320 kbps is considered "transparent" — indistinguishable from the original for most people. These formats are great for streaming, portable devices, and saving storage space.

44.1 kHz / 16-bit — CD quality, perfect for music and general use. This is the standard for most audio files.
48 kHz / 24-bit — DVD/Blu-ray quality, recommended for video production and professional work.
96 kHz / 24-bit — High-resolution audio, useful for archival and studio mastering (larger files).
22.05 kHz — Suitable for voice recordings, podcasts, and audiobooks where smaller file size is preferred.
We recommend keeping the original sample rate unless you specifically need to change it, as resampling can slightly affect quality.

Yes! Since processing is done locally in your browser, there are no artificial server-side file size limits. However, very large files (over 200 MB) may take longer to process and could be limited by your device's available memory. For optimal performance, we recommend files under 100 MB. The tool handles files up to 4 GB in size, though conversion time increases with file duration and complexity. For multi-hour recordings, consider splitting them into smaller segments.

WAV — Choose this for uncompromised quality, audio editing, archiving, or when you need a universally compatible lossless format. Ideal for studio work and when storage space isn't a concern.
FLAC — Best for archiving music collections with lossless quality at roughly half the size of WAV. Widely supported by audiophile players and software like VLC, Foobar2000, and Plex.
MP3 — The most universally compatible format. At 320 kbps, it offers excellent quality with small file sizes. Perfect for portable devices, car stereos, and sharing online. MP3 works on virtually every device ever made.
OGG — An open-source alternative to MP3 with better sound quality at similar bitrates. Great for games, streaming, and open-source projects. Supported by most modern browsers and players.
AAC — The default format for Apple devices (iPhone, iPad, Mac). Offers better quality than MP3 at the same bitrate. Ideal for iTunes, Apple Music, and iOS ecosystem users.

No. Converting from a lossy format (like MP3) to a lossless format (like WAV or FLAC) will not restore lost quality. Once audio data is removed during lossy compression, it cannot be recovered. The resulting WAV/FLAC file will sound exactly the same as the original MP3 — it will just take up more space. Think of it like making a photocopy of a photocopy: the quality is limited by the weakest link in the chain. For best results, always convert from the highest-quality source available.

Our audio converter works on all modern browsers: Chrome, Firefox, Safari, Edge, and Opera — on both desktop and mobile devices. It uses the Web Audio API, which is supported by 97%+ of browsers worldwide. For the best experience, keep your browser updated to the latest version. Mobile users can convert audio files directly from their phone or tablet. No app installation required — just open the page in your browser.

Conversion speed depends on your device's CPU, the file duration, and the chosen output settings. For a typical 3-5 minute song, conversion is nearly instantaneous (under 2 seconds). Longer files (30+ minutes) may take 5-15 seconds. Since processing happens locally, you don't experience network latency or server queue delays. Modern devices with multi-core processors handle audio conversion very efficiently. Close unnecessary background apps for the fastest performance.

Currently, this tool processes one file at a time for optimal performance and simplicity. If you need to convert multiple files, you can process them sequentially — the tool resets quickly after each conversion. For batch conversion needs, we recommend using desktop software like FFmpeg (free, command-line), Audacity (free, GUI), or dBpoweramp (paid). These tools offer robust batch processing with extensive format support. We're considering adding batch conversion in a future update.