SparkText by SparkSlides exports a real GIF or MP4 you insert into PowerPoint, Google Slides, or Keynote like any other image or video — no plugin, no add-in. This guide covers the exact steps, when to pick GIF vs MP4, and two things that trip people up: PDF exports and 4K playback.
Google Slides: insert the GIF via Insert → Image — it autoplays during presentation mode with no extra setting. Keynote:insert the MP4 via Insert → Choose, then set it to auto- play and loop in the Format sidebar's Movie tab.
MP4 gives sharper color and smaller files for anything with a smooth glow, gradient, or dense texture — GIF's 256-color palette visibly bands on those. GIF's advantage is universality: it behaves like a plain image, so it works anywhere an image works (email, docs, chat), while a video sometimes needs an extra click to enable playback depending on the app. Effects with a soft glow or a dense 3D texture (Neon Glow, City Lights, Matrix Rain, Endless, Swirl, Cylinder Spin) export MP4-only for exactly this reason — the editor only shows the formats each effect actually supports well.
No hard limit from PowerPoint itself, but a smaller file is easier to email and keeps your .pptx from bloating. SparkText's own QA bar targets under 15 MB per GIF at default length — if a GIF export comes out larger than expected, MP4 will almost always be smaller for the same animation.
PowerPoint's PDF export freezes every GIF and video on its first frame — for a plain looping effect that's just one instant of the loop, but for a reveal-style animation (Typewriter, Split & Join) frame zero is blank or partial by definition. SparkText handles this automatically: those exports hold on the fully-revealed instant for a brief moment before the loop plays, so the frozen PDF frame always shows complete text.
Usually not, for slide embedding. True 4K MP4 requires H.264 Level 5.1 — a hardware decode requirement, not just a bitrate setting — which needs meaningfully newer hardware than the 1080p profile (Level 4.0). On an older or lower-end machine, PowerPoint's video engine can fail to play a Level 5.1 file silently rather than showing an error. 1080p is the safer choice for embedding in a deck you'll present on unknown hardware; if you do need 4K, test the exported file on the actual presenting machine beforehand.