vercel/next.js · error · Error

Image with src "${src}" has invalid "width" property. Expect

Error message

Image with src "${src}" has invalid "width" property. Expected a numeric value in pixels but received "${width}".

What it means

Props validation in getImgProps: width was present but parsed to NaN (e.g. a string like "auto" instead of a pixel number). The prop expects a numeric pixel value for non-fill images; the received raw value is echoed in the message.

Source

Thrown at packages/next/src/shared/lib/get-img-props.ts:513

          )
        }
        if (style?.width && style.width !== '100%') {
          throw new Error(
            `Image with src "${src}" has both "fill" and "style.width" properties. Images with "fill" always use width 100% - it cannot be modified.`
          )
        }
        if (style?.height && style.height !== '100%') {
          throw new Error(
            `Image with src "${src}" has both "fill" and "style.height" properties. Images with "fill" always use height 100% - it cannot be modified.`
          )
        }
      } else {
        if (typeof widthInt === 'undefined') {
          throw new Error(
            `Image with src "${src}" is missing required "width" property.`
          )
        } else if (isNaN(widthInt)) {
          throw new Error(
            `Image with src "${src}" has invalid "width" property. Expected a numeric value in pixels but received "${width}".`
          )
        }
        if (typeof heightInt === 'undefined') {
          throw new Error(
            `Image with src "${src}" is missing required "height" property.`
          )
        } else if (isNaN(heightInt)) {
          throw new Error(
            `Image with src "${src}" has invalid "height" property. Expected a numeric value in pixels but received "${height}".`
          )
        }
        // eslint-disable-next-line no-control-regex
        if (/^[\x00-\x20]/.test(src)) {
          throw new Error(
            `Image with src "${src}" cannot start with a space or control character. Use src.trimStart() to remove it or encodeURIComponent(src) to keep it.`
          )
        }

View on GitHub (pinned to 0eb3775416)

Solutions

1. Pass width as a number of pixels (not a string like "100%").

When it happens

Trigger: next/image width prop is not a numeric pixel value.

Common situations: Passing a string like '100px' or '50%' as width to next/image.

AI-assisted analysis of vercel/next.js@0eb3775416 (2026-08-19). Data as JSON: /api/errors/be3e021ebee51da7. Report an issue: GitHub.