Document Thumbnail

Returns the intrinsic size (width, height in points/pixels) of every page in a document.#

Fast, non-rendering metadata call. Iterates the document's pages and reports their native dimensions so clients can pre-compute a viewer layout (reserved per-page heights, aspect ratios) before any page image is fetched. Works for PDFs and multi-page images (e.g. TIFF). Units are whatever the underlying format uses natively: PDF pages are in points (1pt = 1/72in), image frames are in pixels. Only the ratio matters for viewer layout.

Parameters

Responses

curl -X GET "$LMKIT_ONE_URL/lmkit/v1/document-thumbnail/$FILEID/page-sizes" \
  -H "Authorization: Bearer $LMKIT_API_KEY"

Lists file extensions the thumbnail endpoint can render.#

Returns the union of PDF and image extensions supported by this endpoint. Clients should call this once at startup (cache the result) and use it to decide whether to route a document into a paginated viewer or fall back to a generic display. Using this endpoint avoids hard-coded extension lists drifting from server capabilities.

Responses

curl -X GET "$LMKIT_ONE_URL/lmkit/v1/document-thumbnail/supported-formats" \
  -H "Authorization: Bearer $LMKIT_API_KEY"

Renders a page of a document (PDF or image) as an image.#

Returns an image for a previously uploaded file. Supports PDF documents (any page) and image files including TIFF, BMP, PNG, JPEG, GIF, and WebP. For multi-page TIFF files, the 'page' parameter selects which frame to render. Output format is controlled by the 'format' parameter (jpeg, png, or webp; default jpeg). The response includes an 'X-Page-Count' header with the total number of pages in the document. Returns 422 Unprocessable Content if the file cannot be processed (e.g. encrypted PDF). The response includes the ProblemDetails error codes: 'password_required', 'invalid_format', 'unsupported_security', 'page_error'.

Parameters

Responses

curl -X GET "$LMKIT_ONE_URL/lmkit/v1/document-thumbnail/$FILEID" \
  -H "Authorization: Bearer $LMKIT_API_KEY"