How it works
用加密随机数生成 UUID v4——按需复制。
即时生成符合 RFC 的 UUID v4。
How many UUIDs?
Generated UUIDs (v4)
用加密随机数生成 UUID v4——按需复制。
Conversions run in your tab with JavaScript — no desktop app required.
Files stay on your device during processing. We do not receive your uploads.
Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).
用加密随机数生成 UUID v4——按需复制。
UUID v4 随机——数据库需唯一性检查。 处理 100% 在ブラウザ内オフラインで行われます——ファイルから出ることはありません您的设备。
Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.
You control quality settings. Choose higher quality for no quality loss when converting online.
Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.
Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.
When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.