Supported Formats Reference
Kreuzberg supports 91+ file formats across 8 major categories with intelligent format detection and comprehensive metadata extraction. All formats support text and metadata extraction. Additional capabilities like OCR and table detection are noted per format.
Office Documents
Word Processing
| Format |
Extensions |
MIME Type |
Capabilities |
| Microsoft Word |
.docx |
application/vnd.openxmlformats-officedocument.wordprocessingml.document |
Full text extraction, tables, embedded images, metadata, styles |
| Word Macro-Enabled |
.docm |
application/vnd.ms-word.document.macroEnabled.12 |
Macro-enabled document extraction, metadata |
| Word Template |
.dotx, .dotm, .dot |
Various Word template MIME types |
Template document extraction, metadata |
| OpenDocument Text |
.odt |
application/vnd.oasis.opendocument.text |
Full text extraction, tables, embedded images, metadata, styles |
Spreadsheets
| Format |
Extensions |
MIME Type |
Capabilities |
| Excel Workbook |
.xlsx |
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
Sheet data, cell values, formulas, cell metadata, charts |
| Excel Macro-Enabled |
.xlsm |
application/vnd.ms-excel.sheet.macroEnabled.12 |
Sheet data, formulas, macros (text only), metadata |
| Excel Binary |
.xlsb |
application/vnd.ms-excel.sheet.binary.macroEnabled.12 |
Binary sheet data extraction, metadata |
| Excel Legacy |
.xls |
application/vnd.ms-excel |
Legacy sheet data extraction, metadata |
| Excel Add-in |
.xla |
application/vnd.ms-excel |
Add-in data extraction |
| Excel Macro Add-in |
.xlam |
application/vnd.ms-excel.addin.macroEnabled.12 |
Macro add-in metadata |
| Excel Template |
.xltm |
application/vnd.ms-excel.template.macroEnabled.12 |
Template data and metadata |
| Excel Template (XML) |
.xltx |
application/vnd.openxmlformats-officedocument.spreadsheetml.template |
XML template data and metadata |
| Excel Template (Legacy) |
.xlt |
application/vnd.ms-excel |
Legacy template data extraction |
| OpenDocument Spreadsheet |
.ods |
application/vnd.oasis.opendocument.spreadsheet |
Sheet data, cell values, formulas, metadata |
Presentations
| Format |
Extensions |
MIME Type |
Capabilities |
| PowerPoint Presentation |
.pptx |
application/vnd.openxmlformats-officedocument.presentationml.presentation |
Slide text, speaker notes, embedded images, metadata |
| PowerPoint Legacy |
.ppt |
application/vnd.ms-powerpoint |
Legacy slide text extraction, metadata |
| PowerPoint Slideshow |
.ppsx |
application/vnd.openxmlformats-officedocument.presentationml.slideshow |
Slideshow content, speaker notes, metadata |
| PowerPoint Template |
.potx, .potm, .pot |
Various PowerPoint template MIME types |
Template slide extraction, metadata |
PDF
| Format |
Extensions |
MIME Type |
Capabilities |
| Portable Document Format |
.pdf |
application/pdf |
Text extraction, tables, embedded images, metadata, OCR (when needed), password protection support |
eBooks
| Format |
Extensions |
MIME Type |
Capabilities |
| EPUB |
.epub |
application/epub+zip |
Chapter text, metadata, embedded resources, navigation |
| FictionBook |
.fb2 |
application/x-fictionbook+xml |
Book content, metadata, chapter structure |
Database
| Format |
Extensions |
MIME Type |
Capabilities |
| dBASE |
.dbf |
application/x-dbf |
Table data extraction as markdown, field type support |
Hangul
| Format |
Extensions |
MIME Type |
Capabilities |
| Hangul Word Processor |
.hwp, .hwpx |
application/x-hwp, application/haansofthwpx |
Korean document format, text extraction |
Images (OCR-Enabled)
Raster Images
| Format |
Extensions |
MIME Type |
Capabilities |
| PNG |
.png |
image/png |
OCR text extraction, table detection, EXIF metadata, dimensions, color space |
| JPEG |
.jpg, .jpeg |
image/jpeg |
OCR text extraction, table detection, EXIF metadata, color profile |
| GIF |
.gif |
image/gif |
OCR text extraction, animation metadata, dimensions |
| WebP |
.webp |
image/webp |
OCR text extraction, metadata, lossy/lossless detection |
| Bitmap |
.bmp |
image/bmp |
OCR text extraction, dimensions, color depth |
| TIFF |
.tiff, .tif |
image/tiff |
OCR text extraction, multi-page support, EXIF metadata, compression info |
Advanced Image Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| JPEG 2000 |
.jp2 |
image/jp2 |
OCR via pure Rust decoder (hayro-jpeg2000), table detection, resolution metadata |
| JPEG 2000 Extended |
.jpx |
image/jpx |
Advanced JPEG 2000 features, high-resolution content, metadata |
| JPEG 2000 Compound |
.jpm |
image/jpm |
Compound image support, mixed content |
| Motion JPEG 2000 |
.mj2 |
video/mj2 |
JPEG 2000 video/sequence metadata |
| JBIG2 |
.jbig2, .jb2 |
image/jbig2 |
Bi-level image OCR, high compression, technical documents |
| Portable PixMap |
.pnm, .pbm, .pgm, .ppm |
image/x-portable-pixmap |
OCR for plain image formats, raw pixel data |
Vector Graphics
| Format |
Extensions |
MIME Type |
Capabilities |
| Scalable Vector Graphics |
.svg |
image/svg+xml |
DOM parsing, embedded text extraction, graphics metadata, vector elements |
Web & Data
Markup & Structured Text
| Format |
Extensions |
MIME Type |
Capabilities |
| HyperText Markup |
.html, .htm |
text/html |
DOM parsing, text extraction, metadata (Open Graph, Twitter Card), link extraction |
| XHTML |
.xhtml |
application/xhtml+xml |
XHTML parsing, metadata extraction, semantic structure |
| XML |
.xml |
application/xml |
DOM parsing, namespace handling, text extraction, structure analysis |
Structured Data Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| JSON |
.json |
application/json |
Schema detection, nested structure parsing, validation |
| YAML |
.yaml, .yml |
application/x-yaml |
Hierarchical data parsing, custom tags, nested structures |
| TOML |
.toml |
application/toml |
Configuration parsing, table structures, type preservation |
| CSV |
.csv |
text/csv |
Delimiter detection, header inference, type detection |
| TSV |
.tsv |
text/tab-separated-values |
Tab-separated value parsing, header detection |
Text & Markup Languages
| Format |
Extensions |
MIME Type |
Capabilities |
| Plain Text |
.txt |
text/plain |
Raw text extraction, encoding detection |
| Markdown |
.md, .markdown |
text/markdown |
CommonMark parsing, GFM extensions, front matter |
| Djot |
.djot |
text/djot |
Djot format parsing, semantic structure |
| reStructuredText |
.rst |
text/x-rst |
RST parsing, directive handling, role extraction |
| Org Mode |
.org |
text/org |
Org mode structure, outline parsing, metadata |
| Rich Text Format |
.rtf |
application/rtf |
Text with formatting extraction, font information |
Email & Archives
Email Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| Email Message |
.eml |
message/rfc822 |
Headers (from, to, subject, date), body (HTML/plain text), attachments, threading info |
| Microsoft Outlook |
.msg |
application/vnd.ms-outlook |
Outlook headers, body content, attachments, recipient metadata |
Archive Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| ZIP Archive |
.zip |
application/zip |
File listing, nested archive support, compression metadata |
| Tar Archive |
.tar |
application/x-tar |
File listing, permission metadata, nested archives |
| Gzip Tar |
.tgz |
application/gzip |
Compressed archive listing, metadata |
| Gzip |
.gz |
application/gzip |
Compressed file metadata |
| 7-Zip |
.7z |
application/x-7z-compressed |
File listing, compression info, nested archives |
Academic & Scientific
Citation Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| BibTeX |
.bib |
text/bibtex |
Structured parsing, entry types, field extraction |
| BibLaTeX |
.biblatex |
text/bibtex |
Extended BibTeX format, advanced field support |
| RIS |
.ris |
application/x-research-info-systems |
Structured RIS format parsing, type detection |
| NIH RIS |
.nbib |
application/x-research-info-systems |
NIH/PubMed format, structured citation data |
| EndNote |
.enw |
application/x-endnote |
EndNote XML format, citation metadata |
| Citation Style Language |
.csl |
application/vnd.citationstyles.csl+xml |
CSL JSON/XML parsing, style definitions |
Scientific & Technical Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| LaTeX |
.tex, .latex |
application/x-latex |
LaTeX source parsing, commands, document structure |
| Typst |
.typ |
text/plain |
Typst markup parsing, document structure |
| JATS XML |
.jats |
application/xml |
PubMed JATS parsing, article structure, metadata |
| Jupyter Notebook |
.ipynb |
application/x-ipynb+json |
Cell extraction (code + markdown), output parsing, metadata |
| DocBook |
.docbook |
application/docbook+xml |
DocBook XML parsing, semantic structure |
Documentation Formats
| Format |
Extensions |
MIME Type |
Capabilities |
| OPML |
.opml |
application/x-opml+xml |
Outline parsing, hierarchy extraction, metadata |
| Perl POD |
.pod |
text/x-pod |
Perl documentation parsing, section extraction |
| Manual Page |
.mdoc |
text/plain |
UNIX manual page parsing, section structure |
| Troff/Groff |
.troff |
text/troff |
Typesetting markup parsing, document structure |
Format Capabilities Summary
All 85+ formats support full or partial text extraction. Document structure and encoding are automatically detected.
Metadata Support
Comprehensive metadata extraction includes:
- Document properties (title, author, subject, creation date, modification date)
- Format-specific metadata (page count, dimensions, encoding, language)
- EXIF data (for images)
- Document statistics (word count, character count)
OCR (Optical Character Recognition)
OCR is available for image formats:
- Raster Images: PNG, JPEG, GIF, WebP, BMP, TIFF
- Advanced Formats: JPEG 2000, JBIG2, PNM/PBM/PGM/PPM
- Configurable Backends: Tesseract (all languages), EasyOCR, PaddleOCR (Python), Guten (Node.js)
Table Detection
Smart table detection and reconstruction available for:
- PDF documents (native tables and scanned content with OCR)
- Office documents (Excel, Word)
- Images (via OCR backends)
- HTML/XML (from markup structure)
Archive & Nested Document Support
Archives and nested formats support file listing and sequential extraction:
- ZIP, TAR, TGZ, 7Z archives
- Email attachments
- Nested archives within archives
Getting Started
For language-specific examples and detailed API documentation, see the API Reference.
For OCR configuration and backend selection, see the OCR Backends Guide.
For comprehensive format details and format detection, see the Complete Format Reference.
