Drop your music files or a whole folder and listen right in the browser. Build a playlist, shuffle or repeat it, shape the sound with a 10-band EQ, change the speed and set a sleep timer. Your files are played from your own device and never uploaded.
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Equalizer
Playlist
Drop audio files or a folder here · MP3, FLAC, WAV, OGG, Opus, M4A/AAC · files never leave your device
Keyboard shortcuts
Space play/pause · N next · P previous · ←→ seek 5 s · ↑↓ volume · M mute · S shuffle · R repeat
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How to use the Online Audio Player
Add your music: press Add files or Add folder, or drop files and folders onto the playlist. Two short demo tracks are there so you can try the player first.
Press Play or click any track. Use the waveform to jump to any point.
Choose how tracks join: Gapless for live albums and DJ mixes, or a crossfade for a radio-style blend.
Shape the sound: open the EQ, pick a preset such as Bass boost or Vocal, or drag the bands yourself.
Set a sleep timer if you are listening at night; playback fades out and stops on time.
Control it from the keyboard: Space, N, P, arrow keys, M, S and R, or your keyboard's media keys.
Audio formats at a glance
Format
Type
Typical size for 4 minutes
Notes
WAV
Uncompressed
≈ 40 MB (44.1 kHz, 16-bit stereo)
Exact CD-quality samples, no compression at all
FLAC
Lossless
≈ 20-30 MB
Same sound as WAV, roughly half the size; supports tags and cover art
MP3
Lossy
≈ 9.6 MB at 320 kbps, ≈ 3.8 MB at 128 kbps
Plays everywhere; may add a short silence at the start and end
M4A / AAC
Lossy
≈ 7.7 MB at 256 kbps
Better quality than MP3 at the same bitrate
OGG (Vorbis) / Opus
Lossy
≈ 3-6 MB
Open formats; Opus is very efficient, especially for speech
Size = bitrate × duration ÷ 8. For example, 320 kbps × 240 s ÷ 8 = 9,600 kB ≈ 9.6 MB. Uncompressed audio is 44,100 samples × 2 bytes × 2 channels = 176.4 kB per second.
Equalizer bands and what they change
Band
Range
Boost to
Cut to
31-62 Hz
Sub-bass
Add rumble and kick-drum weight
Reduce boom on small speakers
125-250 Hz
Bass / low mids
Add warmth and body
Remove muddiness
500 Hz-1 kHz
Mids
Bring instruments forward
Reduce a boxy or nasal sound
2-4 kHz
Upper mids
Improve voice clarity
Soften harshness
8-16 kHz
Treble / air
Add sparkle and detail
Tame hiss and sibilance
Listening tips
Cutting a band usually sounds more natural than boosting several others.
Use Gapless for concept albums and live recordings, and a 4-6 second crossfade for party playlists.
For podcasts and audiobooks, try 1.25× or 1.5× with Keep pitch on, plus the Spoken word EQ preset.
Drop a whole folder to add an album in track order: files are sorted by name with numbers in natural order.
Frequently asked questions
Are my music files uploaded?
No. The player reads the files straight from your device using the browser's file access. Nothing is sent to a server, and the playlist disappears when you close the page.
Which audio formats can it play?
Anything your browser can decode. All modern browsers play MP3, WAV, AAC/M4A and Ogg Vorbis or Opus. FLAC plays in current Chrome, Edge, Firefox and Safari. Files your browser cannot decode are marked as unsupported in the playlist.
What does gapless playback do?
Many albums, live recordings and DJ mixes flow from one track straight into the next. In gapless mode the next file is loaded in advance on a second player and started right as the current one ends, so there is no pause between tracks. Tiny gaps can remain if the files themselves were encoded with silence padding.
How does the equalizer work?
The EQ has ten bands from 31 Hz to 16 kHz, one per octave, each adjustable by up to 12 dB. When you boost bands, the player lowers the overall level a little to leave headroom and avoid clipping distortion.
Does changing the speed change the pitch?
Not with Keep pitch ticked: the browser time-stretches the audio so voices and instruments stay in tune. Untick it for the classic tape effect, where faster playback also sounds higher.
How does the sleep timer work?
Choose a time and the player counts down. In the last 10 seconds the volume fades smoothly, then playback pauses. You can also choose End of this track to stop when the current song finishes.
Can I save my playlist?
Browsers do not allow a web page to reopen files from your disk later without asking you again, so the playlist is not saved between visits. Your volume, EQ, speed and transition settings are remembered in this browser.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.