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 new instance.
Website	Connect a domain you own to index website pages.
R2 Bucket	Connect a Cloudflare R2 bucket to index stored documents.

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`
Log	`.log`	`text/plain`
Config	`.ini`, `.conf`, `.env`, `.properties`, `.gitignore`, `.editorconfig`, `.toml`	`text/plain`, `text/toml`
Markdown	`.markdown`, `.md`, `.mdx`	`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`
YAML	`.yaml`, `.yml`	`application/x-yaml`
CSS	`.css`	`text/css`
JavaScript	`.js`	`application/javascript`
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`
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`	`image/jpeg`, `image/png`, `image/webp`, `image/svg+xml`
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 has a file size limit of up to 4 MB.

Files that exceed this limit will not be indexed and will show up in the error logs.