🖼️ TIFF 转 PNG（支持多页、保留透明）TIFF to PNG Converter
把 TIFF/TIF 图片（扫描件、传真、印刷和相机文件）无损转换为 PNG：多页 TIFF 每页一张，保留透明通道，支持 LZW、Deflate、PackBits、JPEG、CCITT 传真压缩和 16 位图像，多张打包 ZIP，全部在浏览器本地处理。Convert TIFF/TIF images — scans, faxes, print and camera files — to lossless PNG. Multi-page TIFFs give one PNG per page, transparency is kept, and LZW, Deflate, PackBits, JPEG, CCITT fax compression and 16-bit images are supported, with ZIP download. Everything runs locally in your browser.
使用说明与常见问题How-to & FAQ
「TIFF 转 PNG（支持多页、保留透明）」是什么？What is the TIFF to PNG Converter tool?
把 TIFF/TIF 图片（扫描件、传真、印刷和相机文件）无损转换为 PNG：多页 TIFF 每页一张，保留透明通道，支持 LZW、Deflate、PackBits、JPEG、CCITT 传真压缩和 16 位图像，多张打包 ZIP，全部在浏览器本地处理。Convert TIFF/TIF images — scans, faxes, print and camera files — to lossless PNG. Multi-page TIFFs give one PNG per page, transparency is kept, and LZW, Deflate, PackBits, JPEG, CCITT fax compression and 16-bit images are supported, with ZIP download. Everything runs locally in your browser.
如何使用「TIFF 转 PNG（支持多页、保留透明）」？How do I use the TIFF to PNG Converter tool?
在「TIFF 转 PNG（支持多页、保留透明）」中，选择或拖入文件，然后点击「全部下载（ZIP）」按钮即可。In the TIFF to PNG Converter: Choose or drop your files, then click "Download all (ZIP)".
和 TIFF 转 JPG 有什么区别？How is this different from TIFF to JPG?
PNG 是无损格式：每个像素原样保留，透明区域保持透明，适合文字扫描件、图纸、截图和还要继续编辑的图片；代价是文件通常比 JPG 大。照片只需分享、想要小文件时，用 TIFF 转 JPG。PNG is lossless: every pixel is kept exactly and transparent areas stay transparent, which suits text scans, drawings, screenshots and images you will keep editing; the cost is that files are usually larger than JPG. For photos you only want to share as small files, use TIFF to JPG.
多页 TIFF 怎么处理？How are multi-page TIFFs handled?
每一页单独转换成一张 PNG，文件名为“原名-p1.png、-p2.png …”，一次最多 50 页（超出时会提示还有几页没有转换），可用“全部下载（ZIP）”打包。单个 TIFF 文件最大 200 MB。Each page becomes its own PNG named name-p1.png, -p2.png and so on, up to 50 pages at a time (a message says how many pages were left over), and Download all (ZIP) bundles them. Each TIFF file can be up to 200 MB.
支持哪些 TIFF？Which TIFFs are supported?
使用开源 UTIF.js（MIT）解码，支持无压缩、LZW、Deflate/ZIP、PackBits、JPEG 压缩和 CCITT G3/G4 传真压缩；黑白、灰度、RGB、CMYK 和 16 位图像会转换为 8 位 sRGB 的 PNG（16 位精度和 CMYK 色彩空间不会保留）。文件被截断、某页无法解码或 LZW 数据损坏时，会在结果下方说明是哪一页。Decoding uses the open-source UTIF.js (MIT): uncompressed, LZW, Deflate/ZIP, PackBits, JPEG and CCITT G3/G4 fax compression. Black-and-white, grayscale, RGB, CMYK and 16-bit images become 8-bit sRGB PNGs (16-bit precision and the CMYK color space are not kept). If the file is truncated, a page cannot be decoded or LZW data is damaged, a message under the results names the page.
文件会上传吗？Are files uploaded?
不会，TIFF 在浏览器里解码，再用 Canvas 编码为 PNG，文件不会离开你的设备。No. The TIFF is decoded in your browser and re-encoded to PNG with Canvas; files never leave your device.
「TIFF 转 PNG（支持多页、保留透明）」免费吗？需要注册吗？Is the TIFF to PNG Converter free? Do I need an account?
「TIFF 转 PNG（支持多页、保留透明）」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 PNG 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.