Audio · free & private
Convert, compress and edit audio online
Convert between MP3, WAV, FLAC and more, compress recordings, trim clips and transcribe voice to text — all on your own device.
Audio
Convert
1 tool
Audio
Compress
1 tool
Audio
Edit
15 tools
Cut audio files to a start/end time online for free. 100% client-side. Files never leave your device.
Combine two or more audio files into one track online for free. Runs entirely in your browser. No upload.
Split a recording at chosen timestamps and download each section as a ZIP. Free, private and 100% client-side.
Make an audio file quieter or louder with a simple percentage control. Free and private in your browser.
Add smooth fade-in and fade-out to any audio file online for free. Private by design. Processed locally.
Balance perceived loudness of voice, music and mixed recordings. Free, private and fully offline in your browser.
Speed up or slow down audio while keeping pitch as natural as possible. Free and private in your browser.
Reverse a recording and export it in a common audio format. Free, private and 100% client-side.
Record microphone audio, preview the take and download a file. Fully private: nothing leaves your device.
Clean up voice memos and recordings by reducing constant background noise. Free and private in your browser.
Reduce lead vocals from a stereo song for a karaoke-style backing track. Classic center cancel, not AI separation.
Cut a song to a short clip, add a fade-out and export MP3 or M4A for phones. Free and private in your browser.
Shift a recording's pitch up or down without changing length. Free, private and fully offline.
Boost or cut bass, mid and treble on any audio file. Free and private, processed locally in your browser.
Transcribe audio or voice recordings to text with AI (Whisper) running entirely in your browser. Upload MP3, WAV, M4A or even video. Nothing is uploaded.
Products
Apps
How it works
- 01Drop your audio
Add a song, voice memo or recording to any tool below.
- 02Convert, compress or cut
Pick a target format and bitrate, a smaller size, or trim the clip and transcribe speech.
- 03Download instantly
Processing runs on your device via WebAssembly. The result downloads straight from your browser.
Why audio tools on AZ Tooling?
Voice memos, interviews and music are personal — uploading them to a random converter shouldn't be the price of changing format. AZ Tooling converts, compresses and cuts audio with on-device FFmpeg, and transcribes speech with a local AI model, so recordings never leave your machine.
Convert between MP3, WAV, FLAC, AAC, OGG and M4A, compress large recordings for sharing, trim clips to the second, or turn speech into text. Free, unlimited and watermark-free.
Frequently asked questions
Are my recordings uploaded anywhere?
No. Conversion, compression, trimming and even voice-to-text transcription all run locally in your browser. Your audio never leaves your device.
Which audio formats are supported?
MP3, WAV, FLAC, AAC, OGG, M4A and more, in any direction. You can also extract audio from video files, like MP4 to MP3.
How does voice-to-text work without a server?
The transcription model downloads to your browser once, then runs on your device. You get cloud-quality speech recognition with zero exposure of the recording.
Explore more
Video, audio, images, documents, fonts, CAD and more — 380+ conversion pairs, all processed privately on your own device.
Shrink videos, images, audio and PDFs by up to 90% with smart quality controls — privately, right in your browser.
Remove backgrounds, enhance photos, cut video and audio, and let on-device AI do the heavy lifting — no uploads, ever.
Merge, split, sign, protect, convert and organize PDFs — a complete PDF suite that never sees your documents.
Dedicated workspaces for PDF, images, video and audio, all designed to run on your device.
Convert, compress, resize, crop and enhance images — plus one-click AI background removal — all processed privately on your own device.
Convert between MP4, MOV, WEBM and GIF, shrink huge clips, trim and crop footage, and add automatic captions — privately in your browser.
Convert PDFs, Word files, spreadsheets and ebooks, then merge, split, sign, protect and compress — without your documents ever leaving your device.