Frequently asked questions
Answers to common questions about using the website
Are these audio tools really free?
Yes. Current tools for audio conversion, compression, trimming, splitting, video-to-audio, recording, and more are free to use without account registration.
Are files uploaded to a server?
No. This is a key feature of the platform. Audio conversion, compression, trimming, splitting, and video-to-audio are handled as much as possible in the browser, and file data is not actively uploaded to remote servers.
Why can very large files be slow or fail?
Because much of the processing happens locally in the browser, speed and stability depend on CPU performance, available memory, and the size of the source audio. For very long, lossless, or large files, a more powerful desktop device is recommended.
Which formats are supported?
Supported input and output formats vary by tool, commonly including MP3, WAV, M4A, FLAC, OGG, OPUS, AAC, and some video formats in specific tools. Check the specific tool page for the latest format support and limits.
Will previous processing results still be there after refreshing the page?
Usually not. To protect privacy, audio processing normally stays within the current browser session, and the result needs to be downloaded and saved manually. After closing or refreshing the page, temporary results usually do not remain available.
Can these audio tools be used on mobile?
Yes. The website uses responsive design and works on phones, tablets, and desktops. However, for lossless, long, or large audio files, using a desktop computer is recommended for better performance and a smoother overall experience.
Which tools support batch processing?
Tools such as audio compression, conversion, mute processing, volume adjustment, loudness normalization, and loop making support batch processing and work well for multiple files at once. Tools like audio merging, splitting, trimming, fade editing, and speed or pitch changes are better suited to handling one file at a time because they need more precise timing or parameter control.
What is the difference between quick mode and compatible mode?
Quick mode usually prefers stream copy or fewer re-encoding steps, so it is faster and works well for source files with good compatibility. Compatible mode usually re-encodes the output, so it is slower but generally more stable across players, devices, and browsers. If quick mode does not give the result you want, switching to compatible mode is often the safer choice.
Why can some audio files not be previewed directly on the page?
This happens because browsers support different audio codecs and container formats to different degrees. Some files can still be read for duration, bitrate, or processing, but the browser may not be able to play them directly. In that case, you can continue processing and download the result, or switch to compatible mode and export to a more common format before previewing again.
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