Compress, convert & edit audio
without uploading it.
Powerful audio utilities that run directly in your browser. WAV compression, MP3/FLAC/OGG conversion, audio cutting, and merging. Your files never leave your device.
Most-used audio utilities
WAV Compressor
Compress WAV files directly in your browser. Choose an output format and quality, then download a smaller audio file, with no uploads.
WAV File Size Reducer
Reduce the size of a WAV file in your browser by lowering the sample rate, bit depth, or channel count, with full control over quality.
WAV to MP3
Convert WAV to MP3 in your browser. Choose a bitrate, keep your sample rate and channels, and download an MP3 that plays anywhere.
Audio Cutter
Cut or trim any audio file in your browser. Enter exact start and end times and download the clip. Your file never leaves your device.
The browser is the compute layer
Aback Audio ships audio-processing capabilities to your browser. Decoding runs on Web Audio, and encoding runs on local WASM codecs, so your recordings, voice notes, and music never reach our servers.
Local decoding
Files are parsed and decoded in your browser with the native Web Audio API and local parsers. Nothing is streamed to a queue or processing farm.
Local encoding
MP3, OGG, and FLAC encoding run on WASM codecs loaded into your tab. The output is assembled on your device and offered as a download.
No account, no upload
There is no upload endpoint, no object storage, and no account required. You can verify this in your browser's network inspector while any tool runs.
How Aback Audio compares
All audio tools
Compression, conversion, and editing utilities. Every one runs entirely in your browser.
WAV Compressor
Compress WAV files directly in your browser. Choose an output format and quality, then download a smaller audio file, with no uploads.
WAV File Size Reducer
Reduce the size of a WAV file in your browser by lowering the sample rate, bit depth, or channel count, with full control over quality.
Audio Compressor
Compress MP3, WAV, FLAC, OGG, and M4A audio files locally. Pick a target format and quality, then download the smaller file.
WAV to MP3
Convert WAV to MP3 in your browser. Choose a bitrate, keep your sample rate and channels, and download an MP3 that plays anywhere.
WAV to FLAC
Convert WAV to FLAC losslessly in your browser. Keep every sample while cutting the file size dramatically, with no uploads.
WAV to OGG
Convert WAV to OGG Vorbis in your browser. Open, modern, and efficient, with smaller files than MP3 at the same quality.
Audio Cutter
Cut or trim any audio file in your browser. Enter exact start and end times and download the clip. Your file never leaves your device.
Audio Merger
Merge multiple audio files into one track in your browser. Reorder clips, mix sample rates automatically, and download the combined file.
Frequently asked questions
Everything you want to know about private, browser-native audio processing.
Are the audio tools really free?
Yes. Every Aback Audio tool is free with no watermarks and no account. The site is supported by unobtrusive advertising that never touches your audio.
How do I know my audio isn't uploaded?
The tools run entirely on your device. You can open your browser's developer tools → Network tab while processing and confirm that no request carries your file.
Which formats can I convert?
You can read WAV, MP3, FLAC, OGG, and M4A/AAC and write WAV, MP3, FLAC, and OGG, with quality, sample rate, and channel controls where the codec supports them.
Does compressing WAV to MP3 lose quality?
MP3 and OGG are lossy codecs and discard some audio detail. FLAC and PCM WAV are lossless. Every tool states whether your selected output is lossless or lossy.
Can I cut and merge audio too?
Yes. The Audio Cutter trims any supported file to exact start/end times, and the Audio Merger combines up to 24 clips while normalising sample rates automatically.
Does it work on my phone?
Yes. The tools are touch-friendly and memory-aware, and processing runs locally on mobile Safari and Chrome just as it does on desktop.