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For most PickFu surveys, upload images at least 800 px wide with consistent aspect ratios across options. Specific question types (Click Tests, 5-Second Tests, SERP Tests) have additional requirements — see the specs below.

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Image requirements by question type

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Head-to-Head, Ranked, Single Select, Multi Select, Star Rating, and Emoji Reaction questions

  • Minimum width: 800 pixels
  • Recommended width: 800–1,200 pixels for optimal clarity
  • File formats: JPG, PNG, GIF, WebP, and 15+ other formats
  • Maximum file size: 20 MB per image
  • Aspect ratio: Keep aspect ratios consistent across all options in the same survey
Consistent aspect ratios prevent one option from appearing larger or more prominent than others, which could bias respondent choices.

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Image Sets (up to 9 images per option)

  • Minimum width: 800 pixels per image
  • Recommended width: 1,200 pixels for best quality
  • File formats: JPG, PNG, GIF
  • Images per set: up to 9 images
  • Maximum file size: 20 MB per image
Keep all images within a set at the same dimensions. Maintain consistent aspect ratios across all sets being compared, and order images logically (e.g., main product image first, then detail shots). Image Sets work with all question types except Click Tests, 5-Second Tests, and Likert scale questions. For more, see Testing Image Sets with PickFu.

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Amazon A+ Content layout

  • Recommended dimensions: 970 × 300 pixels for basic A+ Content, 1464 × 600 pixels for premium A+ Content, and 600 × 450 pixels for mobile modules
  • Images per option: Up to 6 A+ Content images
  • Layout: PickFu stacks wide images vertically, renders them at equal width, and adds white space padding so each option displays consistently
For the full workflow, see How to test Amazon A+ Content with PickFu.

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Click Tests

  • Minimum width: 1,000 pixels
  • Recommended width: 1,200–1,600 pixels for accurate heatmap generation
  • File formats: JPG, PNG, GIF
  • Maximum file size: 20 MB
Higher resolution images produce more accurate heatmaps. If your image is too small, click coordinates may cluster and reduce the precision of your results. Click Tests don’t support zooming. Respondents see and click your image at its displayed size, so make sure key details are legible without zooming.

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5-Second Tests

  • Minimum width: 1,000 pixels
  • Recommended width: 1,200–1,600 pixels
  • File formats: JPG, PNG, GIF
  • Maximum file size: 20 MB
Since respondents only see the image for 5 seconds, clarity matters. Use high-resolution images so details are readable at a glance.

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SERP mockups

  • Product image: Square (1:1 aspect ratio) recommended
  • Minimum size: 500 × 500 pixels
  • File formats: JPG, PNG
SERP mockups simulate Amazon search results, so your product image should look the way it would on an actual listing.

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General best practices

  • Use consistent aspect ratios across all options so they display evenly side by side.
  • Minimum 800 px wide for standard surveys. Larger images scale to fit the respondent’s screen, and respondents can zoom in on images while answering.
  • Max file size: 20 MB per image.
  • Supported formats: JPG, PNG, GIF, WebP, BMP, TIFF, SVG, PSD, HEIF, ICO, JPEG 2000, AI, EPS, PDF, DjVu, FLIF, JPEG XR, raw files (.arw, .cr2), and TGA.

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Resizing your images

The easiest way to match aspect ratios is the auto-resize tool in the survey builder. When you upload option images with different aspect ratios, the survey builder shows a Resize images to match? prompt. Click Resize all images to normalize them to one aspect ratio. PickFu adds white padding instead of cropping, so nothing gets cut off. Click Keep originals to skip it. If you’d rather resize images before uploading, use free online tools like Pixlr, Canva, or Bulk Resize Photos. The goal is matching aspect ratios across options so they display evenly side by side.

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FAQs

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My images look blurry in the preview — what should I do?

Upload higher resolution images. For standard surveys, aim for at least 800 px wide. For Click Tests and 5-Second Tests, the minimum is 1,000 px wide and 1,200–1,600 px is recommended. Respondents can zoom in on images in every question type except Click Tests, so higher resolution always helps.

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Can I upload animated GIFs?

Yes. Animated GIFs are supported across all question types and will play automatically when respondents view your survey.

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Do images need to be the same exact size?

They don’t need to be pixel-identical, but they should have the same aspect ratio. Consistent aspect ratios ensure options appear at similar visual weight and don’t introduce bias. If your aspect ratios don’t match, click Resize all images when the survey builder prompts you.
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