Attachments

Pass File, FileList or FilePart objects to sendMessage. Files are read as data URLs and stored as file parts on the user message.

<script setup lang="ts">
const { messages, input, sendMessage } = useChat({ provider: ai, model: 'gpt-4o' })
const files = ref<FileList>()

async function submit() {
  await sendMessage({ text: input.value, files: files.value })
  input.value = ''
  files.value = undefined
}
</script>

<template>
  <input type="file" multiple @change="files = ($event.target as HTMLInputElement).files ?? undefined">
  <input v-model="input" @keydown.enter="submit">
</template>

Text is optional — sendMessage({ files }) sends only the attachments.

Remote URLs skip the upload step:

sendMessage({ text: 'Describe this', files: { type: 'file', mediaType: 'image/png', url: 'https://example.com/cat.png' } })

Provider support

Provider	Images	PDF	Audio	Text	Remote URLs
OpenAI	✓	✓	wav, mp3	inlined as text	images only
Anthropic	✓	✓	—	✓ (document)	images, PDF
Google	✓	✓	✓	✓	fileData URIs
Ollama	✓	—	—	inlined as text	—

Unsupported combinations throw a descriptive error before the request is sent.

Helpers

import { fileToDataURL, convertFilesToParts } from 'vue-llm'

const url = await fileToDataURL(blob)
const parts = await convertFilesToParts(input.files) // FilePart[]