By the PixBulk team · 2026-07-28 · 5 min read
GIF frame delays explained — the 20ms browser rule, why some GIFs race, and how to change GIF speed online without uploading.
GIFs store a delay per frame, measured in hundredths of a second. Values below 2 (20ms) are a special case: browsers clamp them to 100ms. So a GIF authored at 10ms per frame will play five times slower than intended in Chrome, Firefox and Safari. This single quirk explains most 'my GIF is broken' reports.
Screen recorders often export at 30–60fps with sub-frame delays. Converted to GIF, those delays hit the browser clamp and everything crawls. The fix is normalization: rescale delays to safe values (30–100ms) or reduce the frame count. Our GIF Speed Changer applies your multiplier and snaps every delay into the safe range automatically.
Set the speed multiplier below 1× — 0.5× doubles every delay. This is the tasteful way to make reaction GIFs readable and stop memes from flashing.
If a sped-up GIF looks choppy, halve the frame count instead of halving delays. Fewer frames at longer delays often looks smoother than many frames at short ones. Extract frames with GIF Frame Extractor, remove every other one, and rebuild with Images to GIF Maker.