Creative specs and how to upload

JOLT creatives are portrait 1080 × 1920 images or videos for an 8-second spot. Accepted formats, size limits, the four ways to add a creative, and how to manage your library.

The spec

Requirement
OrientationPortrait
Dimensions1080 × 1920 pixels (9:16). Other sizes at the same ratio are accepted within 2%.
Spot length8 seconds. Every spot on a JOLT screen plays for 8 seconds, still or video.
Image formatsJPEG, PNG, GIF, WebP — up to 10 MB
Video formatsMP4, WebM — up to 50 MB
AudioNot played. Screens are silent.
Safe zoneKeep critical content inside the central 80% of the frame
TextMinimum 48 px; large, high-contrast, few words

A still image is shown for the full 8 seconds. A video should be cut to 8 seconds; a longer video is trimmed to the spot.

Four ways to add a creative

  1. Upload. Drag a file into the creative step or the Creatives page. Dimensions, format and duration are checked as you upload, and anything off-spec is flagged before you save.
  2. Generate with Spark. Describe the ad and Spark produces a portrait creative at the right size, using your brand details. Edit the prompt and regenerate until it is right.
  3. Import from Canva. Connect your Canva account and pick a design. It is fitted to 1080 × 1920 automatically.
  4. Pick from your library. Any approved creative can be reused across campaigns.

You can also bulk upload several files at once from the Creatives page.

Fitting

Files you upload must match the 9:16 ratio. Creatives generated by Spark or imported from Canva are automatically scaled and centre-cropped to fill 1080 × 1920, which is why a landscape Canva design will lose its edges — start from a portrait template.

Your creative library

The Creatives page lists every creative in your organization with its status (pending review, approved or rejected), the campaigns using it, and a preview. Rename creatives so they are easy to find in reports.

Review

Every creative is checked by the JOLT team before it plays, usually under one business day. See Creative review.

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