Audio Merger: Join MP3 Songs

Audio Merger joins MP3 songs and other audio files into one track: pick your files, drag them into order, choose gapless, a pause or a crossfade between them, and merge audio right on your phone.

MERGE AUDIO IN THREE STEPS
• Pick two or more audio files at once, or add a whole folder
• Drag the handle or use the up and down arrows to set the order; a number shows each track's place
• Tap Merge, choose how the tracks join and the output format, and save one file

JOIN SONGS THE WAY YOU WANT
• Gapless: tracks follow each other with no pause, ideal for live albums and DJ sets
• Crossfade of up to 12 seconds, with an equal-power or linear curve
• Or leave a silent gap of up to 10 seconds between files
• Match loudness: each file is measured and quiet and loud tracks are evened out before joining
• Play together: layer every file from the same moment to mix songs into one sound
• See the total length and the estimated file size before you start

EDIT EACH TRACK BEFORE YOU MERGE
• Trim the start and end with exact times such as 90, 1:30 or 1:30.5
• Set the volume of a single track from 10% to 200%
• Fade in and fade out of up to 10 seconds per track
• Sort 1, 2, 10 in natural order, reverse the list, or select and remove files
• Your list and edits are saved, so you can continue where you left off

FOR MUSIC, PODCASTS AND AUDIOBOOKS
• Combine songs or MP3 files into one long track for the car, the gym or a party
• Join recorded lessons, voice notes or podcast parts into a single episode
• Merge audiobook parts and save a chapter list as .txt and .cue files
• Use the sound of video files on your phone and join it with your music
• Build a medley or a workout mix: combine tracks with smooth crossfades

AFTER MERGING
• Normalize the volume or remove silence at the start and end
• Edit tags and cover art: title, artist, album and cover picture
• Share the merged file to another app, or find it in Music/Audio Merger

MORE AUDIO TOOLS
• Cut: trim a song with a waveform and exact times
• Mixer: layer tracks with their own volume, start time and loop
• Split a file into equal parts, fixed-length parts or at silences
• Volume boost up to 300%
• Audio Lab: equalizer, bass boost, noise reduction, reverb, 8D sound, key and tempo
• Studio: loop a sound, insert an intro, split by chapters, batch tag editor, batch rename and embedded lyrics

FORMATS
• In: MP3, M4A, AAC, WAV, FLAC, OGG, OPUS, AMR and other audio or video files your phone can decode
• Out: MP3, M4A, WAV, FLAC, OPUS, OGG or AIFF, depending on the encoders on your phone
• Up to 100 files in one list; your original files are never changed

FREE PLAN, CREDITS AND PREMIUM
• Merging up to 5 files with gapless joins or pauses is free
• On the free plan, a crossfade or loudness matching uses 1 credit per merge, and each file past 5 uses 1 credit
• Effects in the Audio Lab also use credits on the free plan
• New installs get 5 welcome credits; a short ad adds 1 more, up to 5 a day; credit packs are sold in the app
• Premium (monthly, yearly or lifetime) removes ads and all credit costs, so you can merge long lists with every option

PRIVACY AND PERMISSIONS
• Audio Merger processes your files on your device; nothing is uploaded
• Internet is used only for ads, analytics, crash reports, Google Play purchases and ad-consent choices
• Access to audio files is requested only when needed; video files open through the system picker

QUICK ANSWERS
• How many files can I join? Up to 100 in one list. The free plan merges 5 at no cost; more files use credits or Premium.
• Which phones are supported? Android 8.0 and newer.

Please merge only music and recordings you have the right to use.