TIFF ファイルについて
TIFF (TIFF Image · 画像フォーマット)
TIFF Image（.tiff）は、専門的なワークフローやデータ交換・アーカイブで広く利用されているファイル形式です。KaijuConverterで高速に変換できます。
カテゴリ
Raster & Vector Images
拡張子
.tiff
MIMEタイプ
image/tiff
対応ロール
TIFF が誕生した
背景と歴史。
TIFF — Tagged Image File Format — was created in 1986 by Aldus, the company behind PageMaker, as a universal interchange format for the then-brand-new world of desktop scanners. Each scanner vendor had its own proprietary format, and publishers wanted one file type that would accept them all. TIFF's trick was its name: every piece of data is a numbered "tag" (tag 256 = image width, tag 257 = image height, tag 259 = compression), and readers simply ignore tags they don't understand.
Adobe acquired Aldus in 1994 and maintained TIFF as the de-facto master format for high-end print, archival, and scientific imaging. Three decades later TIFF still powers museum digitization projects, satellite imagery archives, and medical imaging workflows. It’s the image format that refused to die because it was designed to absorb any feature that came along.
豆知識＆
トリビア。
TIFF's tag system was so extensible that GeoTIFF (for satellite imagery) and BigTIFF (for files over 4 GB) were added decades later without breaking old readers.
A TIFF can contain multiple images in a single file — useful for multi-page scanned documents and faxes.
The format supports over 50 different compression schemes, including CCITT Group 4 (fax), JPEG, LZW, Deflate, and completely uncompressed.
LZW compression in TIFF was briefly controversial due to Unisys patent claims in the 1990s — the same patent that haunted GIF.
NASA, the Library of Congress, and most national archives mandate TIFF for long-term preservation of scanned documents.
長所と
制限事項。
長所
- Lossless by default — no generation loss on successive edits and saves.
- Supports any bit depth (1 to 32 bits per channel), any color model, any number of channels.
- Extensible tag system means vendor-specific data survives alongside standard tags.
- Multi-page containers are perfect for scanned documents, faxes, and DICOM-like stacks.
- Industry-standard for archival, museums, scientific imaging, and high-end print prepress.
制限・弱点
- File sizes are huge compared to JPEG/WebP/AVIF — often 10-30× larger.
- Not a web format — no browser displays TIFF natively.
- Ambiguous spec areas mean some TIFFs only open correctly in the tool that created them.
- Weak animation support — designed for still imagery.
一般的なファイルサイズ目安
Scanned A4 page (300 dpi, B&W)
100-300 KB
Scanned A4 page (600 dpi, color)
15-40 MB
Print-quality magazine photo
30-150 MB
Satellite GeoTIFF tile
50 MB - 5 GB
技術仕様
- MIME type
- image/tiff
- Extensions
- .tif, .tiff
- Standard
- TIFF 6.0 (1992); BigTIFF extension for 64-bit offsets
- Max file size
- 4 GB (TIFF); 2^64 bytes (BigTIFF)
- Compression options
- None, LZW, Deflate, JPEG, CCITT G3/G4, PackBits, JBIG
他形式から変換
TIFF
他形式へ変換
TIFF
主な活用シーン
Print production, professional photography, document scanning, archival storage.
関連フォーマット
よく見られている比較
TIFF の人気変換ペア
TIFF から変換する際によく選ばれている出力形式です。
TIFF に関するよくある質問
よくある 質問
KaijuConverterにTIFFファイルをアップロードするだけで、ソフトをインストールせずにPDF、JPG、PNGなどの標準形式へ即座に変換できます。
はい、25MBまで完全無料（24時間パスやProプランでは最大1GB）で変換でき、アップロードされたファイルは60分後にサーバーから自動削除されます。
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1回限りの支払いで24時間、最大1GBのファイルおよび最大50ファイルの一括変換が利用可能です。
大容量の動画、PDF、ロスレス音声を広告なし・優先キューでブラウザから直接変換。
最大1,024 MBの高速クラウド処理、24時間暗号化保持、優先サポート。
Convert thousands of camera RAW files (CR3, NEF, ARW) to WebP, AVIF, or TIFF in one pass.
GPU-accelerated RAW development with end-to-end 16-bit ICC color profile management.