For most PickFu polls, upload images at least 500 px wide with consistent aspect ratios across options. Specific poll types (Click Tests, 5-Second Tests, SERP Tests) have additional requirements — see the specs below.
Image requirements by poll type
Head-to-Head, Ranked, Single Select, Multi Select, Star Rating, and Emoji Reaction polls
Minimum width: 500 pixels
Recommended width: 800–1,200 pixels for optimal clarity
File formats: JPG, PNG, GIF, WebP, and 15+ other formats
Maximum file size: 10 MB per image
Aspect ratio: Keep aspect ratios consistent across all options in the same poll
Consistent aspect ratios prevent one option from appearing larger or more prominent than others, which could bias respondent choices.
Image Sets (2–9 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: 2–9 images
Maximum file size: 10 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 poll types except Click Tests. For more, see Testing Image Sets with PickFu.
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: 10 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.
5-Second Tests
Minimum width: 1,000 pixels
Recommended width: 1,200–1,600 pixels
File formats: JPG, PNG, GIF
Maximum file size: 10 MB
Since respondents only see the image for 5 seconds, clarity matters. Use high-resolution images so details are readable at a glance.
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.
General best practices
Use consistent aspect ratios across all options so they display evenly side by side.
Minimum 500 px wide for standard polls. Larger images get resized down; respondents can click to zoom.
Max file size: 10 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.
Resizing your images
If your images need resizing, 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.
FAQs
My images look blurry in the preview — what should I do?
Upload higher resolution images. For standard polls, aim for at least 800 px wide. For Click Tests and 5-Second Tests, use 1,200 px or wider. Respondents can click to zoom in, so higher resolution always helps.
Can I upload animated GIFs?
Yes. Animated GIFs are supported across all poll types and will play automatically when respondents view your poll.
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.