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 with no file size limits.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Convert OGG audio files to MP3 format directly in your browser. Audio never leaves your device — conversion and editing run locally in your browser with FFmpeg WASM. Private and free. for universal device playback.
Convert your MP3 music library to lossless WAV format in one batch. Audio editors and podcasters need WAV for professional production workflows. Everything runs locally in your browser — nothing is uploaded.
Convert M4A audio files to FLAC format directly in your browser. Audio never leaves your device — conversion and editing run locally in your browser with FFmpeg WASM. Private and free. for universal lossless archival.
Converts EPUB files to PDF format — e-readers, mobile devices, and accessible digital books to document sharing, printing, and archival with consistent formatting. All conversion happens locally in your browser with no file size limits.
Converts HEIC files to PDF format — Apple device photos to document sharing, printing, and archival with consistent formatting. All conversion happens locally in your browser with no file size limits.
MP3 (MPEG-1 Audio Layer 3) uses lossy compressed encoding and is best for universal music playback and sharing across all devices and platforms. WAV (Waveform Audio File Format) uses uncompressed lossless encoding and excels at professional audio editing, mastering, and archival in DAWs and production software. Converting between them lets you take advantage of each format's strengths — for example, using a compressed format for sharing and a lossless format for editing. All conversion happens locally in your browser with no file size limits.
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.
Seconds for typical files on a modern device; large files scale with size and CPU. Conversion speed depends on the machine, not the formats — close heavy tabs for big batches.
From lossy compressed to uncompressed lossless: quality is preserved as far as the formats allow.
Yes — archive MP3 originals before batch-converting. Re-converting from WAV back to MP3 never restores discarded data.
Text to Speech (TTS)
Generate natural-sounding speech from text using your browser's built-in voices. Adjust speed and pitch — download your text as .txt.
Audio Cutter
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.
Speech to Text
Dictate live microphone speech to text in multiple languages through your browser's speech service. Live captions for meetings and notes — free to start, no Toolzum account needed.
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.
Apple Music Preview Extractor
Extracts publicly available 30-second audio preview clips from Apple Music by resolving the store URL. Free to start with no signup.
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.