# SoundBench

> SoundBench (https://soundbench.net) is a free set of audio tools that run entirely in the web browser. Audio files are processed locally on the user's device and are never uploaded. No account, no watermark and no file size limit beyond device memory. Supports MP3, WAV, FLAC, ALAC, AAC/M4A, OGG Vorbis, Opus and AIFF.

## Tools

- [Audio Converter](https://soundbench.net/audio-converter/): Convert audio files online for free between MP3, FLAC, WAV, ALAC, AAC (M4A), OGG, Opus and AIFF. Batch convert whole albums, keep tags, no uploads and no size limit.
- [Reduce Audio File Size](https://soundbench.net/reduce-audio-file-size/): Compress audio files online for free. Pick a quality or type a target size in MB and get a smaller MP3, AAC or Opus file. No upload.
- [Trim Audio](https://soundbench.net/trim-audio/): Cut and trim MP3, WAV, FLAC and M4A files online for free. Select on the waveform, add fade in and fade out, keep or remove a section. No upload.
- [Change Volume](https://soundbench.net/change-volume/): Make an audio file louder or quieter online for free. Boost by up to 30 dB, normalize the peak and prevent clipping. Works with MP3, WAV, FLAC and M4A.
- [Change Audio Speed](https://soundbench.net/change-audio-speed/): Speed up or slow down audio from 0.25x to 3x online for free, with pitch kept natural or changed like a turntable. Export MP3, WAV and more.
- [Change Pitch](https://soundbench.net/change-pitch/): Change the pitch or key of any song online for free. Transpose up to 12 semitones with cent-level tuning while keeping the tempo. No upload.
- [Audio Equalizer](https://soundbench.net/audio-equalizer/): Free online 10-band audio equalizer with bass boost, vocal and podcast presets. Hear changes live and export MP3, WAV or FLAC. No upload.
- [Fake Lossless Checker & Spectrum Analyzer](https://soundbench.net/fake-lossless-checker/): Check if a FLAC or WAV file is real lossless or a transcoded MP3. Free spectrogram, frequency cutoff detection, loudness (LUFS), peak and bit depth check.
- [MP3 Tag & Album Art Editor](https://soundbench.net/mp3-tag-editor/): Edit MP3 ID3 tags, FLAC and M4A metadata and album cover art online for free. Change title, artist, album, track number, genre and lyrics. No re-encoding.
- [Headphone & Speaker Test](https://soundbench.net/headphone-test/): Free online headphone and speaker test. Check left and right channels, polarity (phase), bass, a 20 Hz–20 kHz sweep, your hearing range and a tone generator.
- [Audio File Size & Data Usage Calculator](https://soundbench.net/audio-calculator/): Calculate audio file size from bitrate and duration, how much data lossless and hi-res streaming uses per hour and month, and PCM bitrate.

## Format conversions

- [FLAC to MP3 Converter](https://soundbench.net/flac-to-mp3/): Convert FLAC to MP3 free in your browser. Batch convert albums to 320 kbps MP3 and keep tags and cover art. No upload, no file size limit.
- [WAV to MP3 Converter](https://soundbench.net/wav-to-mp3/): Convert WAV to MP3 online for free. Shrink recordings by up to 90% at 128–320 kbps. Works in your browser with no upload and no size limit.
- [M4A to MP3 Converter](https://soundbench.net/m4a-to-mp3/): Convert M4A (AAC or ALAC) to MP3 for free in your browser. Works with iPhone voice memos and iTunes files. Batch convert, keep tags, no upload.
- [OGG to MP3 Converter](https://soundbench.net/ogg-to-mp3/): Convert OGG Vorbis and Opus audio to MP3 for free in your browser. Batch conversion, tags kept, no upload and no file size limit.
- [MP3 to WAV Converter](https://soundbench.net/mp3-to-wav/): Convert MP3 to WAV online for free. Choose 16-bit, 24-bit or 32-bit float WAV for editing software, DJ gear and DAWs. Runs in your browser.
- [FLAC to WAV Converter](https://soundbench.net/flac-to-wav/): Convert FLAC to WAV losslessly in your browser. Keep 16-bit or 24-bit and hi-res sample rates. Free, private and no file size limit.
- [WAV to FLAC Converter](https://soundbench.net/wav-to-flac/): Convert WAV to FLAC for free and save 30–50% of disk space with no quality loss. 16-bit and 24-bit, hi-res supported, tags added. No upload.
- [FLAC to ALAC Converter](https://soundbench.net/flac-to-alac/): Convert FLAC to ALAC (Apple Lossless M4A) for iPhone, iTunes and Apple Music. Bit-perfect, keeps tags and cover art, no upload.
- [Ringtone Maker](https://soundbench.net/ringtone-maker/): Make a ringtone from any song for free. Pick the best 30 seconds, add a fade and export M4R for iPhone or MP3 for Android. Works in your browser.

## About

- [About SoundBench](https://soundbench.net/about/): How the tools work and why files stay on your device
- [Privacy policy](https://soundbench.net/privacy/)

## Optional

- [Full text of every page](https://soundbench.net/llms-full.txt)