🗂️ TIFF 转 BMP（支持多页）TIFF to BMP Converter
把 TIFF/TIF 图片批量转换为 24 位 BMP：多页 TIFF 每页一张，支持 LZW、Deflate、CCITT 传真等压缩，透明处填充背景色，适合只认 BMP 的老软件、工控设备和打印系统，多张打包 ZIP，全部在浏览器本地完成。Batch-convert TIFF/TIF images to 24-bit BMP — one BMP per page, with LZW, Deflate, CCITT fax and other compressions supported and transparent areas filled — for legacy software, industrial equipment and print systems that only read BMP. Download each file or a ZIP; everything runs locally.
使用说明与常见问题How-to & FAQ
「TIFF 转 BMP（支持多页）」是什么？What is the TIFF to BMP Converter tool?
把 TIFF/TIF 图片批量转换为 24 位 BMP：多页 TIFF 每页一张，支持 LZW、Deflate、CCITT 传真等压缩，透明处填充背景色，适合只认 BMP 的老软件、工控设备和打印系统，多张打包 ZIP，全部在浏览器本地完成。Batch-convert TIFF/TIF images to 24-bit BMP — one BMP per page, with LZW, Deflate, CCITT fax and other compressions supported and transparent areas filled — for legacy software, industrial equipment and print systems that only read BMP. Download each file or a ZIP; everything runs locally.
如何使用「TIFF 转 BMP（支持多页）」？How do I use the TIFF to BMP Converter tool?
在「TIFF 转 BMP（支持多页）」中，选择或拖入文件，按需设置「透明处背景色」等选项，然后点击「全部下载（ZIP）」按钮即可。In the TIFF to BMP Converter: Choose or drop your files, set "Background for transparency", then click "Download all (ZIP)".
TIFF 转 BMP 会损失画质吗？Is quality lost from TIFF to BMP?
8 位 RGB 和灰度 TIFF 转成 24 位 BMP 时每个像素都不变；16 位、CMYK 和带透明的 TIFF 会先转换为 8 位 sRGB 并填充背景色，色彩深度会降低。BMP 不压缩，文件可能比压缩过的 TIFF 大得多。8-bit RGB and greyscale TIFFs keep every pixel when written as 24-bit BMP. 16-bit, CMYK and transparent TIFFs are first converted to 8-bit sRGB and filled with the background colour, so colour depth is reduced. BMP is uncompressed and may be much larger than a compressed TIFF.
多页 TIFF 和各种压缩方式支持吗？Are multi-page TIFFs and all compressions supported?
支持。每一页单独转换（文件名为“原名-p1、-p2 …”），一次最多 50 页；解码使用开源 UTIF.js（MIT），支持无压缩、LZW、Deflate、PackBits、JPEG 和 CCITT G3/G4 传真压缩，16 位和 CMYK 图像会转换为 8 位 sRGB。文件截断或某页损坏时会在结果下方说明是哪一页。单个文件最大 200 MB。Yes. Each page is converted separately (named name-p1, -p2 …), up to 50 pages at a time. Decoding uses the open-source UTIF.js (MIT): uncompressed, LZW, Deflate, PackBits, JPEG and CCITT G3/G4 fax compression; 16-bit and CMYK images become 8-bit sRGB. If a file is truncated or a page is damaged, a message under the results names the page. Each file can be up to 200 MB.
BMP 是什么格式？What kind of BMP is produced?
输出 24 位无压缩 BMP（Windows 位图），兼容几乎所有软件和老设备，但文件很大（宽 × 高 × 3 字节）；透明区域填充为背景色。An uncompressed 24-bit Windows bitmap that almost any software or legacy device can read, but large (width × height × 3 bytes); transparent areas are filled with the background color.
图片会上传吗？Are my images uploaded?
不会。解码和编码都在你的浏览器里完成，文件不会离开你的设备；照片中的 EXIF 元数据（包括拍摄位置）不会写入输出文件。No. Decoding and encoding happen in your browser and files never leave your device; EXIF metadata in photos (including location) is not written to the output.
「TIFF 转 BMP（支持多页）」免费吗？需要注册吗？Is the TIFF to BMP Converter free? Do I need an account?
「TIFF 转 BMP（支持多页）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The TIFF to BMP Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.