Free Offline Audio Tools

Convert, cut, merge, speed up and reverse audio files in your browser. Supports MP3, WAV, FLAC, M4A, OGG and more. No upload, 100% private.

No Upload 100% Private Works Offline Free

Audio processing in your browser — no software, no upload

These audio tools all use FFmpeg.wasm, a full port of the FFmpeg multimedia library compiled to WebAssembly. You get professional audio codec support — MP3, WAV, FLAC, M4A, AAC, OGG — running entirely inside your browser. Your audio files never leave your device.

No software installation is required. No app to download. Just open the tool in your browser, select your audio file, configure the settings, and download the result — all in seconds. Works on Windows, Mac and Linux.

FFmpeg.wasm downloads about 25MB on first use. It is then cached locally so subsequent uses load instantly, even without an internet connection.

Format Converters

WAV to MP3
Convert lossless WAV to compact MP3
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MP3 to WAV
Convert MP3 to uncompressed WAV
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FLAC to MP3
Convert lossless FLAC to portable MP3
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FLAC to WAV
Convert FLAC to uncompressed WAV
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WAV to FLAC
Losslessly compress WAV to FLAC
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M4A to MP3
Convert Apple M4A audio to MP3
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AAC to MP3
Convert AAC audio files to MP3
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OGG to MP3
Convert OGG Vorbis audio to MP3
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MP3 to M4A
Convert MP3 to Apple M4A format
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MP3 to OGG
Convert MP3 to open-source OGG format
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MP4 to MP3
Extract audio track from video files
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Universal Audio Converter
Convert between all supported audio formats
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Edit & Enhance

MP3 Cutter
Cut audio to a specific time range
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Audio Merger
Join multiple audio files into one
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Speed Changer
Speed up or slow down audio playback
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Volume Normalizer
Normalize audio volume levels
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Audio Reverser
Reverse audio playback for creative effects
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Why convert audio without uploading?

Music & recordings

Original recordings and unreleased music should not be uploaded to third-party services. These tools keep your audio private.

Fast conversion

No upload wait time. Local FFmpeg.wasm conversion is often faster than cloud services for files under 200MB.

No file size caps

Cloud audio tools limit uploads to 50–100MB. Browser-based conversion has no server-side limit whatsoever.

Frequently asked questions

Do these audio tools upload my files?

No. All audio processing uses FFmpeg.wasm running inside your browser. Your audio files never leave your device.

What audio formats are supported?

MP3, WAV, FLAC, M4A, AAC, OGG, WMA and more. Each tool page lists the accepted input formats.

Can I convert audio without installing software?

Yes. These tools run entirely in your browser using FFmpeg.wasm. No app install, no plugin needed.

Is there a file size limit?

No server limit. Large audio files may take more time to process depending on your device.

Are these audio tools free?

Yes, completely free with no registration, no watermark, and no limits.

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