vercel/ai · error · Error

Invalid data URL format

Error message

Invalid data URL format

What it means

Error "Invalid data URL format" thrown in vercel/ai.

Source

Thrown at packages/ai/src/util/data-url.ts:9

/**
 * Converts a data URL of type text/* to a text string.
 */
export function getTextFromDataUrl(dataUrl: string): string {
  const [header, base64Content] = dataUrl.split(',');
  const mediaType = header.split(';')[0].split(':')[1];

  if (mediaType == null || base64Content == null) {
    throw new Error('Invalid data URL format');
  }

  try {
    return window.atob(base64Content);
  } catch {
    throw new Error(`Error decoding data URL`);
  }
}

View on GitHub (pinned to 69428b1f8b)

When it happens

Trigger: Thrown at packages/ai/src/util/data-url.ts:9 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of vercel/ai@69428b1f8b (2026-08-30). Data as JSON: /api/errors/c4f2ea35c2d37f32. Report an issue: GitHub.