Free online FLAC to AAC converter. Convert audio files with FFmpeg — no sign-up required. Upload FLAC and download as AAC. Max 4 MB.
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Subtitle: SRT, VTT, ASS, TXT, CSV · Media: MP4, MKV, WebM, MP3, WAV, AAC & more · Max 4 MB for media · Free, no sign-up
Video
Audio
Subtitle Formats
SRT, VTT, ASS, TXT, CSV
Video Formats
MP4, MKV, WebM, MOV, AVI
Audio Formats
MP3, WAV, AAC, Opus, FLAC, OGG
Our free subtitle converter supports all major formats. Convert SRT to VTT, VTT to SRT, ASS to SRT, or export subtitles as plain text or CSV. Subtitle conversion runs entirely in your browser - no files are uploaded to any server. Your data stays private and conversion is instant, even for large files.
Convert between popular audio and video formats including MP4, MKV, WebM, MP3, WAV, AAC, and more. Media conversion uses FFmpeg on our servers. Free tier supports files up to 4 MB - perfect for short clips, audio files, and ringtones. For larger files, sign up for free and use our full FFmpeg tool suite with 500 MB support.
Need AI-powered subtitles for your videos? Generate SRT from video with FlowSub →
FLAC to AAC audio conversion uses FFmpeg for high-quality transcoding. FLAC (Free Lossless Audio Codec) compresses audio without quality loss. Free tier supports files up to 4 MB.