# Audio Converter Online

> Audio Converter Online (audioconverteronline.gloath.com) is a free online audio converter and editor by Gloath Limited (New Zealand). It converts audio between 17 formats, extracts audio from video, and edits audio (trim, merge, speed, pitch, EQ, reverb, 8D, noise reduction and more). All processing happens locally in the user's browser - files are not uploaded.

Key facts:
- Price: free for core features, no account required. Optional Pro subscription: Monthly USD $7.99/month; Yearly USD $47.99/year (7-day free trial).
- Privacy: audio files are processed on-device in the browser (Web Audio API + WebAssembly); they are never uploaded or stored, on any plan.
- Output formats: MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, ALAC, WMA, M4R, AC3, WEBM, MP2, WV, AU, CAF.
- Input formats: MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, ALAC, WMA, M4R, AC3, WEBM, MP2, WV, AU, CAF, AMR, APE, MP4, MOV, MKV, AVI, WEBM video, 3GP, WMV, FLV and more.
- Free plan limits: 5 files per batch, 2 effect regions per file, export up to 48 kHz / 16-bit.
- Platforms: any modern browser (Chrome, Safari, Edge, Firefox) on Windows, macOS, Linux, ChromeOS, Android, iOS. Installable as a PWA.

## Main pages
- [Audio converter (home)](https://audioconverteronline.gloath.com/): drop files, pick a format, convert.
- [Pricing](https://audioconverteronline.gloath.com/pricing): Free vs Pro comparison.
- [All tools](https://audioconverteronline.gloath.com/tools)
- [All formats](https://audioconverteronline.gloath.com/formats)
- [FAQ](https://audioconverteronline.gloath.com/faq)
- [About](https://audioconverteronline.gloath.com/about)

## Tools
- [Audio Cutter](https://audioconverteronline.gloath.com/tools/audio-cutter): Cut and trim MP3, WAV, M4A and any audio file online. Select the part you want with a precise waveform editor and save in any format. Free, no sign-up.
- [Audio Joiner](https://audioconverteronline.gloath.com/tools/merge-audio): Combine multiple MP3, WAV, M4A or any audio files into one. Reorder tracks, add crossfades or gaps, and export in any format. Free and private.
- [Speed Changer](https://audioconverteronline.gloath.com/tools/change-audio-speed): Speed up or slow down any song, podcast or voice recording from 0.25x to 4x without changing the pitch. Free online audio speed changer.
- [Pitch Shifter](https://audioconverteronline.gloath.com/tools/pitch-shifter): Change the pitch or key of any song by semitones without changing its speed. Transpose music for singing, practice or remixes. Free online pitch changer.
- [Volume Booster](https://audioconverteronline.gloath.com/tools/volume-booster): Make quiet audio louder. Boost MP3, WAV or video sound by up to +24 dB with a built-in limiter to prevent distortion. Free and instant.
- [Bass Booster](https://audioconverteronline.gloath.com/tools/bass-booster): Add deep, punchy bass to any song. Adjustable bass boost with a 10-band equalizer and limiter. Free online bass booster for MP3, WAV and more.
- [Slowed + Reverb](https://audioconverteronline.gloath.com/tools/slowed-and-reverb): Create dreamy slowed and reverb versions of any song in seconds. Adjust speed, reverb size and bass, then download as MP3. Free online.
- [Nightcore Maker](https://audioconverteronline.gloath.com/tools/nightcore-maker): Turn any song into nightcore or a sped-up version. Raise speed and pitch together, add bass, and download. Free online nightcore generator.
- [8D Audio](https://audioconverteronline.gloath.com/tools/8d-audio-converter): Convert any song to 8D audio that moves around your head. Adjust rotation speed, depth and room reverb. Best with headphones. Free online.
- [Equalizer](https://audioconverteronline.gloath.com/tools/audio-equalizer): Shape your sound with a 10-band graphic equalizer, bass and treble controls, and low/high cut filters. Presets for vocals, podcasts and music.
- [Reverse Audio](https://audioconverteronline.gloath.com/tools/reverse-audio): Reverse any song, voice or sound effect so it plays backwards. Reverse the whole file or just a selection. Free online audio reverser.
- [Fade In / Out](https://audioconverteronline.gloath.com/tools/fade-in-fade-out): Add smooth fade in and fade out to songs, ringtones and podcasts. Choose the fade length and curve. Free online audio fader.
- [Noise Reduction](https://audioconverteronline.gloath.com/tools/noise-reduction): Remove hiss, hum, fan and background noise from voice recordings, podcasts and videos. Smart spectral noise reduction in your browser. (Pro)
- [Vocal Remover](https://audioconverteronline.gloath.com/tools/vocal-remover): Remove vocals from songs to make karaoke and instrumental tracks, or isolate the vocals for acapellas. Works in your browser. (Pro)
- [Normalize Audio](https://audioconverteronline.gloath.com/tools/normalize-audio): Normalize audio to a consistent peak level or loudness (LUFS) for Spotify, YouTube, Apple Podcasts and broadcast. Batch-normalise many files.
- [Ringtone Maker](https://audioconverteronline.gloath.com/tools/ringtone-maker): Make free ringtones from any song for iPhone (M4R) and Android (MP3). Cut the best part, add fades, and download. Free online ringtone maker.
- [Video to Audio](https://audioconverteronline.gloath.com/tools/video-to-audio): Extract the soundtrack from MP4, MOV, MKV, AVI and WEBM videos and save it as MP3, WAV, M4A or any format. Free, private and fast.
- [Voice Recorder](https://audioconverteronline.gloath.com/tools/voice-recorder): Record your voice or any microphone in your browser, then trim, enhance and save as MP3, WAV or M4A. Free, no install, no sign-up.
- [Remove Silence](https://audioconverteronline.gloath.com/tools/remove-silence): Automatically remove silent gaps and dead air from podcasts, lectures and voice recordings. Trim silence from the start and end. Free online.
- [Reverb & Echo](https://audioconverteronline.gloath.com/tools/add-reverb): Add studio-quality reverb and echo to vocals, music and podcasts. Adjust room size, decay, pre-delay and mix. Free online reverb effect.
- [Stereo to Mono](https://audioconverteronline.gloath.com/tools/stereo-to-mono): Convert stereo audio to mono or mono to stereo. Swap channels, widen the stereo image or invert phase. Free online channel converter.
- [Audio Mixer](https://audioconverteronline.gloath.com/tools/multitrack-mixer): Overlay multiple audio tracks: add background music to voice, mix songs, set volume, offset and looping, with automatic ducking. Online audio mixer. (Pro)
- [Compress Audio](https://audioconverteronline.gloath.com/tools/compress-audio): Reduce audio file size for email, WhatsApp and uploads. Lower the bitrate, convert to mono or use Opus for tiny files. Free online audio compressor.
- [Lo-fi Converter](https://audioconverteronline.gloath.com/tools/lofi-converter): Give any song a warm lo-fi sound with vinyl crackle, tape-style filtering, bitcrushing and slowed tempo. Free online lo-fi generator.
- [Voice Changer](https://audioconverteronline.gloath.com/tools/voice-changer): Change your voice with chipmunk, deep voice, robot, telephone, radio and more effects. Upload or record, then download. Free online voice changer.
- [Audio Splitter](https://audioconverteronline.gloath.com/tools/audio-splitter): Split long audio into parts - by markers or equal lengths. Perfect for podcasts, audiobooks and DJ mixes. Download every part as a ZIP.
- [Tag Editor](https://audioconverteronline.gloath.com/tools/tag-editor): Edit title, artist, album, year, genre and cover art for MP3, M4A and FLAC files online. Batch tagging for whole albums. (Pro)

## Popular conversions
- [MP4 TO MP3](https://audioconverteronline.gloath.com/convert/mp4-to-mp3)
- [WAV TO MP3](https://audioconverteronline.gloath.com/convert/wav-to-mp3)
- [M4A TO MP3](https://audioconverteronline.gloath.com/convert/m4a-to-mp3)
- [MP3 TO WAV](https://audioconverteronline.gloath.com/convert/mp3-to-wav)
- [FLAC TO MP3](https://audioconverteronline.gloath.com/convert/flac-to-mp3)
- [MOV TO MP3](https://audioconverteronline.gloath.com/convert/mov-to-mp3)
- [OGG TO MP3](https://audioconverteronline.gloath.com/convert/ogg-to-mp3)
- [OPUS TO MP3](https://audioconverteronline.gloath.com/convert/opus-to-mp3)
- [MP3 TO M4R](https://audioconverteronline.gloath.com/convert/mp3-to-m4r)
- [AAC TO MP3](https://audioconverteronline.gloath.com/convert/aac-to-mp3)
- [WMA TO MP3](https://audioconverteronline.gloath.com/convert/wma-to-mp3)
- [FLAC TO WAV](https://audioconverteronline.gloath.com/convert/flac-to-wav)
- [M4A TO WAV](https://audioconverteronline.gloath.com/convert/m4a-to-wav)
- [WEBM TO MP3](https://audioconverteronline.gloath.com/convert/webm-to-mp3)
- [AMR TO MP3](https://audioconverteronline.gloath.com/convert/amr-to-mp3)
- [AIFF TO MP3](https://audioconverteronline.gloath.com/convert/aiff-to-mp3)

## Free features
- Convert between 20+ audio formats
- Extract audio from video (MP4, MOV, MKV...)
- Trim, cut, split, merge & fade
- Speed, pitch, EQ, reverb, echo & 20+ effects
- Popular presets: slowed + reverb, 8D, nightcore, bass boost
- Batch convert up to 5 files at a time
- Files stay on your device - no upload, no sign-up

## Pro features
- Studio-grade noise reduction
- Vocal remover & karaoke maker
- Loudness normalisation (LUFS) for Spotify, YouTube & podcasts
- Unlimited batch conversion
- Hi-res export (24/32-bit, up to 192 kHz)
- Multi-track mixer (up to 16 tracks)
- Edit tags & cover art
- Unlimited effect regions
- No ads, ever
- Priority email support

## Optional
- [Full details for LLMs](https://audioconverteronline.gloath.com/llms-full.txt)
- [Privacy policy](https://audioconverteronline.gloath.com/privacy)
- [Terms](https://audioconverteronline.gloath.com/terms)
- Contact: support@gloath.com