🗂️ TIFF 转 GIF（支持多页）TIFF to GIF Converter
把 TIFF/TIF 图片批量转换为 GIF：多页 TIFF 每页一张，适合黑白文档、线稿和图表在网页或邮件中直接显示，自动 256 色调色板，可保留透明，多张打包 ZIP，全部在浏览器本地完成。Batch-convert TIFF/TIF images to GIF — one GIF per page for multi-page TIFFs, handy for showing black-and-white documents, line art and charts on web pages or in email, an automatic 256-colour palette and optional transparency. Download each file or a ZIP; everything runs locally.
使用说明与常见问题How-to & FAQ
「TIFF 转 GIF（支持多页）」是什么？What is the TIFF to GIF Converter tool?
把 TIFF/TIF 图片批量转换为 GIF：多页 TIFF 每页一张，适合黑白文档、线稿和图表在网页或邮件中直接显示，自动 256 色调色板，可保留透明，多张打包 ZIP，全部在浏览器本地完成。Batch-convert TIFF/TIF images to GIF — one GIF per page for multi-page TIFFs, handy for showing black-and-white documents, line art and charts on web pages or in email, an automatic 256-colour palette and optional transparency. Download each file or a ZIP; everything runs locally.
如何使用「TIFF 转 GIF（支持多页）」？How do I use the TIFF to GIF Converter tool?
在「TIFF 转 GIF（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 GIF Converter: Choose or drop your files, set "Background for transparency", then click "Download all (ZIP)".
什么样的 TIFF 适合转 GIF？Which TIFFs suit GIF?
黑白或灰度的扫描文档、线稿和图表颜色少，转 GIF 后画质无损，网页和邮件都能直接显示。注意：用 CCITT G3/G4 压缩的传真 TIFF 本身已非常小，转成 GIF 后文件通常会变大；未压缩的 TIFF 转 GIF 一般会明显变小。彩色照片类 TIFF 在 256 色下会出现色带，建议改用 TIFF 转 JPG 或 TIFF 转 PNG。Black-and-white or greyscale scans, line art and charts have few colours, so they convert to GIF without visible loss and web pages and email display them directly. Note: fax TIFFs compressed with CCITT G3/G4 are already very small and usually get bigger as GIF; uncompressed TIFFs usually get much smaller. Colour photo TIFFs band at 256 colours — use TIFF to JPG or TIFF to PNG instead.
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.
转成 GIF 画质会变差吗？Does GIF reduce quality?
GIF 最多只有 256 种颜色，工具会自动量化调色板；照片和渐变会出现色带，图标、文字和简单图形效果最好。可选择保留透明（GIF 只支持全透明或不透明）。GIF is limited to 256 colors, so the palette is quantised automatically; photos and gradients may show banding, while icons, text and simple graphics work best. Transparency can be kept (GIF supports only fully transparent or opaque pixels).
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 GIF（支持多页）」免费吗？需要注册吗？Is the TIFF to GIF Converter free? Do I need an account?
「TIFF 转 GIF（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 GIF 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.