BMP 转换：全部可用目标BMP conversions: every available target

全部可用目标Every available target

• MarkdownMarkdown 2 步2 steps

  BMPBMP →HTMLHTML →MarkdownMarkdown

  一行自包含的图片语法，负载是整份 .bmp 的 base64：不重编码、不降尺寸。但 BMP 的 data URI 不一定被阅读器显示，那种场合请用外链。One inline image tag whose base64 is the whole .bmp — no re-encode. Readers do not always show a BMP data URI, so an external file is the safer shape.

  有专页 →Full page →

• HTMLHTML 1 步1 step

  BMPBMP →HTMLHTML

  整份 .bmp 以 data URI 原样内嵌进一份能直接打开的网页：不解码、不重编码、不降尺寸；`alt` 与 `title` 用你的文件名主干。全程离线。The whole .bmp is embedded verbatim as a data URI in a page you can open: no decode, no re-encode, no downscale. Fully offline.

  有专页 →Full page →

• Word (.docx)Word (.docx) 2 步2 steps

  BMPBMP →HTMLHTML →Word (.docx)Word (.docx)

  整份 .bmp 经 HTML 进 Word，那条 data URI 被提成包里独立的图片部件：不重编码、不降尺寸。体积随源文件，通常不减。The whole .bmp travels through HTML into Word and becomes its own image part: no re-encode, no downscale. Size follows the source and rarely shrinks.

  有专页 →Full page →

• PDFPDF 1 步1 step

  BMPBMP →PDFPDF

  解码后铺白底、按无损 PNG 流写入 PDF：页面尺寸由图片像素推（96 dpi），一张一页，不是 A4。全程离线，不上传。Decoded onto a white ground and written as a lossless PNG stream: the page is sized from the picture’s pixels, one per page — not A4.

  有专页 →Full page →

• PNGPNG 1 步1 step

  BMPBMP →PNGPNG

  浏览器本地把 .bmp 解码后编成 PNG：像素尺寸与颜色原样带走，不再叠有损压缩。BMP 只能作为输入（浏览器不提供它的编码器），所以这条方向不可逆；一批最多 200 张，结果可打 ZIP。Decode a .bmp and encode it as PNG in your browser: pixel size and colour carry over with no lossy pass. BMP is input-only, so the route does not run backwards.

  有专页 →Full page →

• JPEGJPEG 1 步1 step

  BMPBMP →JPEGJPEG

  浏览器本地把 .bmp 解码后编成 JPEG：质量档 40%–90%、目标体积 20 KB–2 MB、可指定最长边，够不着目标时先降质量再缩像素。BMP 只能作为输入，方向不可逆。Decode a .bmp and encode it as JPEG with a 40%–90% quality step, a 20 KB–2 MB target and an optional longest edge — quality gives way before pixels do.

  有专页 →Full page →

• WebPWebP 1 步1 step

  BMPBMP →WebPWebP

  浏览器把 .bmp 解码后重编码成 WebP：这是 BMP 出口里体积真会下来的一条，代价是像素重画一遍、不再逐字节相同。全程离线。The browser decodes the .bmp and re-encodes it as WebP — the BMP exit where size really drops, paid for with a full redraw and no byte-for-byte sameness.

  有专页 →Full page →

界面上置灰的目标Targets the picker greys out

下面这些目标在路径图上可达，但语义上无效，工作台会把它们置灰并给出原因，而不是让你点下去得到一个空文件。These targets are reachable in the graph but semantically invalid, so the workbench greys them out with the same reason instead of letting you click through to an empty file.

• Excel (.xlsx)：图片无法转换为文本或表格数据（需 OCR，暂不支持）Excel (.xlsx): Images cannot become text or tabular data (needs OCR, not supported)
• CSV：图片无法转换为文本或表格数据（需 OCR，暂不支持）CSV: Images cannot become text or tabular data (needs OCR, not supported)
• 纯文本 (TXT)：图片无法转换为文本或表格数据（需 OCR，暂不支持）plain text (TXT): Images cannot become text or tabular data (needs OCR, not supported)
• JSON：图片无法转换为文本或表格数据（需 OCR，暂不支持）JSON: Images cannot become text or tabular data (needs OCR, not supported)

这个来源格式的共同限制What holds for every target from this source

• BMP 不是可写格式：工作台只允许它作为源，目标列表里不会出现它BMP is not writable: the workbench only offers it as a source and never as a target
• 没有 OCR；图片到 TXT、CSV、JSON、Excel 的组合被置灰并说明No OCR; image to TXT, CSV, JSON and Excel are greyed out with an explanation
• BMP 的原始字节很大，内嵌进 HTML / Word 时按 base64 再膨胀约三分之一BMP bytes are large, and embedding them in HTML or Word adds about a third again through base64
• 转 PDF 会解码、铺白底并按图片尺寸建页；不是 A4，也不是可编辑表格PDF decodes, fills white and builds a page at the image size; it is neither A4 nor an editable table

常见问题Questions people actually ask