Audio Cutter: MP3 Editor & 8D

Audio Cutter is the all-in-one audio editor for your phone. Cut MP3 files, make ringtones, remove vocals, convert formats, record your voice, create 8D audio and more. Everything runs on your phone: no uploads, no account, no ads, and no limits on file length.

Most audio apps put ads after every edit, lock splitting behind a subscription, or lose the file you just saved. Audio Cutter does the opposite. Every tool is free, saved files go to a folder you can find, and your music never leaves your device.

CUT AND EDIT
- MP3 cutter and audio trimmer with a waveform you can zoom down to one millisecond
- Cut out the middle, delete, silence, copy, paste and add silence
- Unlimited undo and redo
- Lossless cutting for MP3, M4A and FLAC: the cut is made without re-encoding, so quality stays exactly the same
- Fade in and fade out with different curves
- Merge any number of songs with crossfade
- Mixer: layer several tracks, set volume, balance and start time for each, and lower the music automatically under a voice
- Split a long file into parts every N seconds, into equal parts, at silences or at times you choose
- Silence remover for podcasts, lectures and voice memos

RINGTONE MAKER
- Make a ringtone, alarm or notification sound from any song
- Set it as your default sound in one tap, with a guided permission step and a system picker fallback

VOCAL REMOVER AND KARAOKE
- Remove vocals from a song and keep the music, or keep only the vocals (acapella)
- Get both as two tracks, or keep a little vocal as a guide
- Runs on an on-device AI model, so there is no upload and no daily limit

8D, 4D, 16D AND 32D AUDIO
- Turn any song into 8D audio that circles around your head, or try 4D, 16D and 32D presets
- Fine-tune the speed of rotation, width, up and down movement, reverb and path

CONVERT AND COMPRESS
- Audio converter for MP3, M4A (AAC), WAV, FLAC, OGG, OPUS, AMR, WMA and AC3
- Batch convert many files at once
- Video to MP3: extract audio from any video, or copy the original audio without quality loss
- Compress audio to a target size such as 16 MB for WhatsApp, 25 MB for email, or any size you choose
- Tag and cover art editor for title, artist, album, genre, year and artwork

SOUND AND VOICE
- 10-band equalizer with 13 presets and a bass booster
- Volume booster, even-out volume and loudness targets (LUFS) for Spotify, YouTube, podcasts and broadcast
- Speed and pitch changer with presets for nightcore and slowed + reverb
- 23 effects: reverb, echo, chorus, flanger, compressor, limiter, telephone, radio and more, with a 15-second preview
- Noise remover: an on-device AI removes background noise from voice, and a classic mode cleans hiss and hum from music
- Voice enhancer: noise removal, clarity, levelling and loudness in one tap
- Voice changer: chipmunk, deep, robot, alien, male to female, female to male and more
- Reverse audio

CREATE
- Voice recorder in lossless quality with a live level meter, pause and resume
- Music maker: compose royalty-free tracks in 14 styles (lo-fi, pop, EDM, hip hop, trap, jazz, cinematic, piano and more) with your mood, tempo, key and instruments
- Text to speech: turn text into an audio file with the voices on your phone
- Tone generator: sine, square, saw, white, pink and brown noise, sweeps, binaural beats for focus and sleep, dial tones and a metronome

ANALYZE
- Find the BPM and musical key of a song, with Camelot notation for DJs
- Measure loudness (LUFS), loudness range and true peak

PRIVATE BY DESIGN
- Works completely offline. The app does not ask for internet access
- No ads, no watermark, no account, no subscription
- Your files stay on your phone and are saved to Music/Audio Cutter, Ringtones, Alarms or Notifications so every other app can see them

Perfect for musicians, podcasters, students, DJs, teachers, voice actors, video creators and anyone who wants a custom ringtone.

Questions or ideas? Write to contact@zenocta.com. We read every message.

Recent changes:
- Remove fade: take away a fade-out or fade-in the song already has. The volume comes back, or the faded part is cut off
- Fade tool: Add fade and Remove fade in one screen
- Editor: new Remove fade button
- Music maker: the volume now stays the same to the end. Quiet start and ending is optional
- Check your result on the same screen and undo any change