中国
AnyDocFlow converts Word, PDF, Excel, PPT, Markdown, ebooks and even CAD files — all directly in your browser with zero uploads, so your files never leave your device. No signup, no watermarks, no limits. Batch conversion with a single ZIP download is a huge time-saver. Output quality is solid and it's completely free. Best converter I've found in a long time."
I've been using Audiowave.net for a few weeks now and honestly wasn't expecting this much for a free online tool. It covers everything from basic format conversion (MP3, WAV, FLAC, AAC, OGG — the full set) to more advanced stuff like vocal extraction, source separation, audio editing, and even noise reduction. The interface is clean and straightforward — no clutter, no confusing menus. You just drag your file in, pick what you need, and it works right in the browser. No uploads to a server either, which is a big plus for privacy. Standout features for me are the vocal extractor (surprisingly clean results) and the batch converter. The source separation into stems (vocals, drums, bass, etc.) is also impressive for a web-based tool. A couple of small things: the UI could look a bit more polished on mobile, and I'd love to see a dark mode at some point. But for a completely free service with this many tools, those are minor nits. Overall, if you need a quick audio fix without installing anything, this is a solid pick. Recommended.