FREE TOOLS
Three free audio tools,and your files never leave your device.
Video to audio, format conversion and audio cutting all happen in your browser: no uploads, no login, no usage limits.
- No uploads
- No login
- No usage limits
- ¥0
Video to Audio
Save the sound from short videos, performance recordings and class recordings as audio files.MP4 · MOV → MP3 · WAV · FLAC · M4AOpenAudio Format Converter
Won't play on your phone, or your software won't open it? Convert between MP3, WAV, FLAC and M4A.MP3 · WAV · FLAC · M4AOpenAudio Cutter
Drag on the waveform to clip a chorus, make a ringtone, or trim the silence at the start.Drag to select · Fade in/outOpen
§ 01Uses
What do you want to do?
- Save a song or dialogue from a video as audioVideo to Audio
- Phone or car stereo won't play FLAC or WAVAudio Format Converter
- Cut a song into a 30-second ringtoneAudio Cutter
- Editing software only accepts WAVAudio Format Converter
- Need just one part of a long recordingAudio Cutter
- Remove the vocals, keep the backing trackBacking-track separationPaid · Preview first
§ 02How it works
Why don't files need uploading?
Decoded in your browser
The processing code loaded with the page reads your file and decodes the sound right in your browser — no server involved.
Re-encoded on your device
Encoders for MP3, FLAC and other formats also run on your device, so speed depends on your hardware.
Cleared when you close the page
Results live only in this page's memory, and you save them when you download; close or refresh the page and they're gone.
§ 03FAQ
Q1Is it really free?
Really. All three tools are free, need no login and have no usage limits. Backing-track separation is a separate paid feature — whether to use it after processing is up to you.
Q2Will my files be uploaded?
No. Processing happens entirely in your browser, and your files never pass through our servers. They're uploaded only if you click "Make a backing track" on the result page and confirm on the next page.
Q3Does it work on phones?
Yes — just open it in your phone's browser. In WeChat you can process and preview too, but WeChat can't save files, so tap "···" in the top-right corner and open it in your browser first.
Q4Is there a file size limit?
Videos up to 2 GB, audio up to 500 MB. Compatibility mode (some WeChat in-app browsers) handles up to 300 MB and 30 minutes.
§ 04Backing-track separation
Done processing — want the vocals gone?
Click "Make a backing track" on any tool's result page — no need to find the file again. Preview 25 seconds for free first, and pay ¥4.9/song only if you're happy.