Audio Tools
Free audio tools — convert between MP3, WAV, FLAC, OGG, trim, and enhance audio files locally in your browser.
About Audio Tools
16 browser-based audio tools — convert MP3, WAV, FLAC, OGG, and AAC, trim clips, and synthesize speech in Indian languages. Speech-to-text runs on our transcription API (1 credit/min); everything else processes locally with FFmpeg WASM and files are never uploaded.
Audio Format Converter
Convert between MP3, WAV, FLAC, OGG, M4A, and AAC audio formats. Pick any input and output format — your files never leave your device.
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.
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.
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.
Audio Compressor
Even out loud and quiet parts of any audio with dynamics compression — podcasts at one steady volume. Stop riding the volume knob — local processing, unlimited saves.
Audio Merger
Combine multiple audio files into one continuous track. Supports crossfade between songs and automatic volume normalization. Perfect for making mixtapes, podcasts, and audiobooks.
Fade In/Out
Apply smooth volume fades to your audio tracks. Supports fade in, fade out, or both with linear, logarithmic, exponential, and S-curve transitions. Perfect for podcast intros and outros.
Noise Reducer
Remove hiss, hum, and background noise from recordings with profile-based reduction. Rescue fan-noisy interviews in one pass — local FFmpeg work, unlimited saves.
Audio Equalizer
Shape audio with multi-band EQ — boost bass, cut mud, add air to dull recordings. Fix a boomy room recording fast — local processing, unlimited saves.
Waveform Generator
Render audio waveforms as shareable PNG images — audiograms, episode art, visual proof. Turn a soundbite into social content — local rendering, unlimited saves.
Vocal Remover
Reduce vocals from stereo tracks using center-channel cancellation (works best on studio mixes; not AI stem separation).
Voice Recorder
Record voice memos straight from your microphone with live levels — interviews, notes, ideas. Capture clean audio without installing apps — local recording, unlimited saves.
Bulk Audio Normalizer
Level whole audio batches with peak normalization to a target dBFS level (default -3) without crushing dynamics. Networks even out 30 episodes so listeners stop riding volume — local Web Audio work, 2 free batches a day.
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.
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.
More from Toolzum
✓ FFmpeg runs in your browser — MP3, WAV, FLAC and OGG never upload.
Works fully offline after first load — nothing leaves your browser.
Pro raises uploads to as much as 2 GB — free tools stay free.
Audio FAQs
MP3 vs WAV vs FLAC — which should I choose?
MP3 for portable listening (320 kbps is transparent for most ears), WAV for editing masters, FLAC for lossless archiving at half the WAV size. OGG/Opus wins for voice streaming at low bitrates.
What bitrate should I convert to?
128 kbps for podcasts and voice, 192–256 kbps for music sharing, 320 kbps for maximum quality. Re-encoding an already-compressed MP3 to a higher bitrate can't restore lost detail.
How does browser audio conversion work?
Files are decoded and re-encoded locally with FFmpeg compiled to WebAssembly — an M4A to MP3 or FLAC to OGG conversion never uploads your audio to any server.
Which languages does speech-to-text support?
Major Indian languages plus English, with transcription billed at 1 credit per minute. Everything else on this hub — conversion, trimming, synthesis — is free within fair daily limits.