EPUB 元数据修改
改写 EPUB 里 OPF 的标题、作者、语言、标识符、出版社、日期与简介后重新打包，其余 zip 条目按原始压缩字节搬运；处理在 Rust 编译的 WebAssembly 里完成，文件不上传。
浏览器本地运行所有计算都在你的浏览器里完成，数据不会离开本机。
EPUB 的 base64
新的 EPUB
输出是修改后 EPUB 的 base64。
正在加载电子书模块…
粘贴 EPUB 的 base64 并填写要修改的字段
改写条目: 0 · 原样条目: 0
这个工具能做什么
- 统一系列电子书的作者与出版社。
- 给自制 EPUB 补上语言与标识符。
- 改标题后直接导出新的 EPUB。
示例
输入
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
输出
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
只有 OPF 会被重写，其它条目（章节、样式、图片）保持原有压缩字节；留空的字段不会被改动。
常见问题
正文会被重新压缩吗？
不会。除 OPF 之外的条目用原始压缩数据搬运，CRC 与内容不变。
留空的字段会怎样？
留空表示不修改；只有明确填写的字段会写进 OPF。
原来没有的字段能加吗？
能。新增元素会插入到 </metadata> 之前。
加密的 EPUB 能改吗？
不能，检测到加密条目会直接报 unsupported。
关键词：epub修改元数据电子书epub editoffline