Convert between MP3, WAV, FLAC, OGG, M4A, and AAC audio formats. Pick any input and output format — your files never leave your device. Audio never leaves your device — conversion and editing run locally in your browser with FFmpeg WASM.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Trim and cut audio files online — MP3, WAV, M4A, FLAC, and OGG. Set start and end times with sliders, then download the trimmed MP3 clip.
Convert whole batches of audio between WAV, MP3, and OGG with one output format and sample rate for the whole batch. Podcasters standardize 50 episodes for every platform — local processing, 2 free batches a day.
Converts MP3 files to WAV format — universal music playback and sharing across all devices and platforms to professional audio editing, mastering, and archival in DAWs and production software. All conversion happens locally in your browser; files up to 100 MB each.
Turn a full podcast episode into a text transcript with AI speech recognition — upload MP3, WAV, or M4A and get searchable text. Hosts convert a 30-minute show into show notes — 1 credit per minute.
Converts between 160+ currencies when online — live rates refresh hourly from the server, with 12 quick-pick majors pinned on top. Offline, the same 12 convert from labeled fallback rates.
FLAC and WAV are lossless — they preserve every detail of the original audio. For smaller files with good quality, use AAC at 256kbps or OGG at 320kbps. MP3 at 320kbps is a safe universal choice.
WAV files are large because they store uncompressed audio. Converting to MP3 reduces file size by 80-90% while maintaining quality that most listeners cannot distinguish from the original.
Converting between lossy formats (MP3, AAC, OGG) does introduce slight quality loss each time because each format re-compresses the audio. Convert from the highest quality source available to minimize degradation.
No — this tool accepts audio files only (MP3, WAV, FLAC, OGG, M4A, AAC, WMA, Opus, AIFF). To pull audio out of a video, use the Video to MP3 Converter first, then convert the extracted audio here.
No — conversion runs with FFmpeg defaults and offers no bitrate, sample-rate, or channel controls. The output uses the encoder default for the target format, so convert from the highest-quality source you have.
Bulk Audio Converter
Convert whole batches of audio between WAV, MP3, and OGG with one output format and sample rate for the whole batch. Podcasters standardize 50 episodes for every platform — local processing, 2 free batches a day.
MP3 Compressor
Shrink MP3 files by lowering bitrate with quality presets — fit podcasts into feed limits. Cut a 50 MB episode to 15 MB cleanly — local FFmpeg work, unlimited saves.