SoundCloud Specifications

Track Upload

Max File Size	4 GB per file (uncompressed)
File Formats	WAV, FLAC, AIFF, ALAC, MP3, AAC, OGG, MP4, MP2, M4A, 3GP, 3G2, MJ2, WMA, AMR
Notes	320 kbps MP3 or lossless WAV/FLAC recommended for best streaming quality; maximum track length 24 hours

Track Duration

Character Limit	Free accounts limited to 180 minutes (3 hours) total upload time duration
Notes	Free accounts limited to 3 hours (180 minutes) cumulative upload time across all tracks (raised from 2 hours)

Streaming Bitrate

Notes	SoundCloud streams in AAC: 96 kbps and 160 kbps for free listeners, up to 256 kbps for Go+ subscribers; legacy MP3 streams are being migrated to AAC; upload the highest quality source file

Track / Playlist Artwork

Dimensions	At least 800 × 800 px
Aspect Ratio	1:1
Max File Size	2 MB
File Formats	JPG, PNG
Notes	Square format required; displayed alongside waveform player

Profile Header

Dimensions	2480 × 520 px
Aspect Ratio	~4.77:1
Max File Size	2 MB
File Formats	JPG, PNG
Notes	Wide banner shown at top of profile page

Profile Photo / Avatar

Dimensions	At least 800 × 800 px (square)
Aspect Ratio	1:1
Max File Size	2 MB
File Formats	JPG, PNG
Notes	Displayed as a circle in comments and followers lists

Track Title

Character Limit	100 characters

Track Description

Character Limit	4,000 characters
Notes	Supports plain text; first ~100 characters shown in embeds

Bio

Character Limit	4,000 characters

Display Name

Character Limit	50 characters

Username / URL

Character Limit	25 characters
Notes	Alphanumeric, hyphens, and underscores; used in the permalink URL

Comment

Character Limit	250 characters

Audio Ad

File Formats	MP3, WAV
Max Duration	15 – 30 seconds
Notes	Served between tracks on free accounts; 44.1 kHz, 192 kbps minimum

Display Companion Ad

Dimensions	300 × 250 px
Max File Size	150 KB
File Formats	JPG, PNG
Notes	Shown alongside audio ad; standard IAB medium rectangle