fileAI accepts documents, images, spreadsheets, presentations, plain text, audio and ZIP archives. Send any file in the list below through an upload and fileAI processes it; anything else stops with an unsupported file type error. This page is about file formats and their MIME types (the fileType upload field), not fileAI file types such as Invoice. See Concepts.

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Accepted types

GIF images and macro-enabled Excel files (.xlsm) are not accepted. Convert GIFs to PNG and save .xlsm workbooks as .xlsx before uploading.

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How fileAI checks the type

You pass fileType (the MIME type) when you request an upload URL. After the file lands in storage, fileAI checks its content type against the list above. If the stored type is not on the list, fileAI inspects the file’s bytes and uses the detected type when that is supported. A file that still does not match stops with an unsupported file type status, and its other processing steps do not run. Inside a ZIP upload, each extracted file is checked the same way. Unsupported files are reported one by one in GET /v1/uploads/{uploadId}, and the rest of the archive still processes.

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Size limits

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Prepare your files

How a file is prepared affects what fileAI can read from it. If a field still comes back wrong or empty from a well-prepared file, improve its description. See Extraction prompts.

Uploads

Single, batch, multipart and ZIP uploads.

AI OCR models

Pick the model that reads your files.