工作原理
在本地 canvas 上制作 1080×1920 Story（图片、文字、Logo），导出 PNG 或 JPG。
在浏览器中设计 1080×1920 分层 Story。
JPG, PNG, and WebP. One photo for the story canvas.
在本地 canvas 上制作 1080×1920 Story（图片、文字、Logo），导出 PNG 或 JPG。
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).
在本地 canvas 上制作 1080×1920 Story（图片、文字、Logo），导出 PNG 或 JPG。
层数过多在旧设备上可能卡顿。关闭标签前请导出。 处理 100% 在浏览器内离线完成——文件不会离开您的设备。
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.