リファレンス
ファイルマジックナンバー一覧
ファイル形式を識別する先頭バイトのシグネチャ（マジックナンバー）を、16進バイト・オフセット・拡張子・MIMEタイプとともに 50 フォーマット分まとめた検索可能な一覧です。拡張子ではなくバイトで判定しましょう。
60 件のシグネチャ
| フォーマット | カテゴリ | 16進シグネチャ | オフセット | ASCII | MIMEタイプ |
|---|---|---|---|---|---|
| Advanced Audio Coding .aac | Audio | FF F1 | 0 | .. | audio/aac |
| Advanced Audio Coding .aac | Audio | FF F9 | 0 | .. | audio/aac |
| Audio Video Interleave .avi | Video | 52 49 46 46 | 0 | RIFF | video/x-msvideo |
| AV1 Image File Format .avif | Image | 66 74 79 70 | 4 | ftyp | image/avif |
| Binary glTF .glb | 3D | 67 6C 54 46 | 0 | glTF | model/gltf-binary |
| Cascading Style Sheets .css | Web | 3A 72 6F 6F 74 | 0 | :root | text/css |
| Comma-Separated Values .csv | Data | 6E 61 6D 65 | 0 | name | text/csv |
| Electronic Publication .epub | Document | 50 4B 03 04 | 0 | PK.. | application/epub+zip |
| Excel Open XML Workbook .xlsx | Document | 50 4B 03 04 | 0 | PK.. | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Executable and Linkable Format .elf .so .o | Executable | 7F 45 4C 46 | 0 | .ELF | application/x-elf |
| Extensible Markup Language .xml | Data | 3C 3F 78 6D 6C | 0 | <?xml | application/xml |
| Extensible Markup Language .xml | Data | 3C | 0 | < | application/xml |
| Free Lossless Audio Codec .flac | Audio | 66 4C 61 43 | 0 | fLaC | audio/flac |
| glTF JSON .gltf | 3D | 7B | 0 | { | model/gltf+json |
| Graphics Interchange Format .gif | Image | 47 49 46 38 37 61 | 0 | GIF87a | image/gif |
| Graphics Interchange Format .gif | Image | 47 49 46 38 39 61 | 0 | GIF89a | image/gif |
| GZIP Compressed Data .gz .gzip | Archive | 1F 8B 08 | 0 | ... | application/gzip |
| HyperText Markup Language .html .htm | Web | 3C 21 64 6F 63 74 79 70 65 | 0 | <!doctype | text/html |
| INI Configuration .ini .conf .cfg | Data | 5B 73 61 6D 70 6C 65 5D | 0 | [sample] | text/plain |
| JavaScript .js .mjs .cjs | Code | 65 78 70 6F 72 74 | 0 | export | text/javascript |
| JavaScript Object Notation .json | Data | 7B | 0 | { | application/json |
| JavaScript Object Notation .json | Data | 5B | 0 | [ | application/json |
| JPEG File Interchange Format .jpg .jpeg | Image | FF D8 FF | 0 | ... | image/jpeg |
| Log File .log | Data | 32 30 32 36 2D | 0 | 2026- | text/plain |
| Markdown .md .markdown | Document | 23 20 | 0 | # | text/markdown |
| MPEG Audio Layer III .mp3 | Audio | 49 44 33 | 0 | ID3 | audio/mpeg |
| MPEG Audio Layer III .mp3 | Audio | FF FB | 0 | .. | audio/mpeg |
| MPEG-4 Audio .m4a | Audio | 66 74 79 70 | 4 | ftyp | audio/mp4 |
| MPEG-4 Part 14 .mp4 .m4v | Video | 66 74 79 70 | 4 | ftyp | video/mp4 |
| Newline Delimited JSON .ndjson .jsonl | Data | 7B | 0 | { | application/x-ndjson |
| Ogg Container .ogg .oga .ogv | Audio | 4F 67 67 53 | 0 | OggS | audio/ogg |
| OpenDocument Text .odt | Document | 50 4B 03 04 | 0 | PK.. | application/vnd.oasis.opendocument.text |
| Plain Text .txt .text | Document | 74 69 74 6C 65 3A | 0 | title: | text/plain |
| Polygon File Format .ply | 3D | 70 6C 79 0A | 0 | ply. | model/ply |
| Polygon File Format .ply | 3D | 70 6C 79 0D 0A | 0 | ply.. | model/ply |
| Portable Document Format .pdf | Document | 25 50 44 46 2D | 0 | %PDF- | application/pdf |
| Portable Network Graphics .png | Image | 89 50 4E 47 0D 0A 1A 0A | 0 | .PNG.... | image/png |
| PowerPoint Open XML Presentation .pptx | Document | 50 4B 03 04 | 0 | PK.. | application/vnd.openxmlformats-officedocument.presentationml.presentation |
| Rich Text Format .rtf | Document | 7B 5C 72 74 66 | 0 | {\rtf | application/rtf |
| Scalable Vector Graphics .svg | Image | 3C 73 76 67 | 0 | <svg | image/svg+xml |
| Scalable Vector Graphics .svg | Image | 3C 3F 78 6D 6C | 0 | <?xml | image/svg+xml |
| SQLite Database .sqlite .sqlite3 .db | Database | 53 51 4C 69 74 65 20 66 6F 72 6D 61 74 20 33 00 | 0 | SQLite format 3. | application/vnd.sqlite3 |
| SubRip Subtitle .srt | Subtitle | 31 0A 30 30 3A 30 30 | 0 | 1.00:00 | application/x-subrip |
| Tab-Separated Values .tsv .tab | Data | 69 6E 64 65 78 09 | 0 | index. | text/tab-separated-values |
| Tagged Image File Format .tif .tiff | Image | 49 49 2A 00 | 0 | II*. | image/tiff |
| Tagged Image File Format .tif .tiff | Image | 4D 4D 00 2A | 0 | MM.* | image/tiff |
| Tape Archive .tar | Archive | 75 73 74 61 72 | 257 | ustar | application/x-tar |
| Tom's Obvious Minimal Language .toml | Data | 74 69 74 6C 65 20 3D | 0 | title = | application/toml |
| VRM Avatar .vrm | 3D | 67 6C 54 46 | 0 | glTF | model/vrm |
| Waveform Audio File Format .wav | Audio | 52 49 46 46 | 0 | RIFF | audio/wav |
| Web App Manifest .webmanifest | Web | 7B | 0 | { | application/manifest+json |
| WebAssembly Binary .wasm | Executable | 00 61 73 6D 01 00 00 00 | 0 | .asm.... | application/wasm |
| WebM .webm | Video | 1A 45 DF A3 | 0 | .E.. | video/webm |
| WebP Image .webp | Image | 52 49 46 46 | 0 | RIFF | image/webp |
| Windows Bitmap .bmp .dib | Image | 42 4D | 0 | BM | image/bmp |
| Word Open XML Document .docx | Document | 50 4B 03 04 | 0 | PK.. | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| YAML Ain’t Markup Language .yaml .yml | Data | 74 69 74 6C 65 3A | 0 | title: | application/yaml |
| ZIP Archive .zip | Archive | 50 4B 03 04 | 0 | PK.. | application/zip |
| ZIP Archive .zip | Archive | 50 4B 05 06 | 0 | PK.. | application/zip |
| ZIP Archive .zip | Archive | 50 4B 07 08 | 0 | PK.. | application/zip |