Data source

You can upload files directly to an instance or connect an external data source.

Data Source	Description
Built-in storage	Upload files directly to an instance. Available by default on every instance.
Website	Connect a domain you own to index website pages.
R2 Bucket	Connect a Cloudflare R2 bucket to index stored documents.

For website data sources, Parse types covers how AI Search finds the pages to index.

Supported file types

AI Search can ingest a variety of file types. The following plain text files and rich format files are supported.

Plain text file types

Format	File extensions	MIME type
Text	`.txt`, `.rst`	`text/plain`, `text/x-rst`
Log	`.log`, `.log.gz`	`text/plain`
Config	`.ini`, `.conf`, `.env`, `.properties`, `.gitignore`, `.editorconfig`, `.toml`	`text/plain`, `text/toml`
Markdown	`.markdown`, `.md`, `.mdx`, `.mdoc`	`text/markdown`
LaTeX	`.tex`, `.latex`	`application/x-tex`, `application/x-latex`
Script	`.sh`, `.bat`, `.ps1`	`application/x-sh`, `application/x-msdos-batch`, `text/x-powershell`
SGML	`.sgml`	`text/sgml`
JSON	`.json`	`application/json`
XML	`.xml`	`application/xml`
SQL	`.sql`	`application/sql`
YAML	`.yaml`, `.yml`	`application/x-yaml`
CSS	`.css`	`text/css`
JavaScript	`.js`	`application/javascript`
TypeScript	`.ts`, `.tsx`	`application/typescript`
PHP	`.php`	`application/x-httpd-php`
Python	`.py`	`text/x-python`
Ruby	`.rb`	`text/x-ruby`
Java	`.java`	`text/x-java-source`
C	`.c`	`text/x-c`
C++	`.cpp`, `.cxx`	`text/x-c++`
C Header	`.h`, `.hpp`	`text/x-c-header`
Go	`.go`	`text/x-go`
Rust	`.rs`	`text/rust`
Swift	`.swift`	`text/swift`
Dart	`.dart`	`text/dart`
Terraform	`.tf`	`text/plain`
EMACS Lisp	`.el`	`application/x-elisp`, `text/x-elisp`, `text/x-emacs-lisp`

Rich format file types

AI Search uses Markdown Conversion to convert rich format files to markdown. The following table lists the supported formats that will be converted to Markdown:

Format	File extensions	Mime Types
PDF Documents	`.pdf`	`application/pdf`
Images ¹	`.jpeg`, `.jpg`, `.png`, `.webp`, `.svg`, `.gif`, `.bmp`	`image/jpeg`, `image/png`, `image/webp`, `image/svg+xml`, `image/gif`, `image/bmp`
HTML Documents	`.html`, `.htm`	`text/html`
XML Documents	`.xml`	`application/xml`
Microsoft Office Documents	`.xlsx`, `.xlsm`, `.xlsb`, `.xls`, `.et`, `.docx`	`application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`, `application/vnd.ms-excel.sheet.macroenabled.12`, `application/vnd.ms-excel.sheet.binary.macroenabled.12`, `application/vnd.ms-excel`, `application/vnd.openxmlformats-officedocument.wordprocessingml.document`
Open Document Format	`.ods`, `.odt`	`application/vnd.oasis.opendocument.spreadsheet`, `application/vnd.oasis.opendocument.text`
CSV	`.csv`	`text/csv`
Apple Documents	`.numbers`	`application/vnd.apple.numbers`

¹ Image conversion uses two Workers AI models for object detection and summarization. See Workers AI pricing for more details.

File limits

AI Search applies these file size limits:

File type	Maximum size
PDF with OCR enabled	10 MiB
PDF without OCR	4 MiB
Plain text, code, configuration, markup, and other formats listed in Plain text file types	10 MiB
Other formats converted to Markdown	4 MiB

Files that exceed these limits are not indexed. They appear in the error logs.

Images and optical character recognition

AI Search supports .jpg, .jpeg, .png, .webp, .gif, .bmp, .tif, .tiff, .heic, and .heif images. Multimodal embedding models embed supported images directly. Text-only embedding models create captions before embedding images.

Optical character recognition (OCR) extracts text from scanned PDFs and images. Set indexing_options.use_ocr to true when creating or updating an instance. OCR is disabled by default and changing this setting triggers a full reindex.

OCR is available for every account. OCR usage is billed as image-processing ingestion tokens. For pricing details, refer to Limits and pricing.