A slideshow workflow built around the preview
The useful question for a slideshow is often not “can it make a video?” but “does the rhythm look right before I commit to a file?” Add the pictures in the order you want, adjust a scene's seconds in its own row, and use the preview canvas to check the framing before recording.
What one measured run produced
I ran the tool with two images at their default three-second duration. The preview reported a six-second project. With the soundtrack set to No music, Chrome finished a WEBM download in 6.884 seconds on the test machine. The same two-image project with Soft ambient tone finished a WEBM download in 7.102 seconds. These are observed runs, not promises about another device.
Photo-by-photo control
Each selected photo gets its own duration field. The control accepts values from one to thirty seconds in half-second steps, so a title image can breathe while a later detail shot moves faster. The order shown in the list is the order recorded to the canvas.
What the browser can record
The shared tool draws the sequence on a 1280 × 720 landscape canvas at thirty frames per second. Chrome and Edge normally offer WEBM; a browser that reports MP4 support can choose MP4 instead. The page does not send the images to a server while it creates the file.
Private slideshow checklist
For a quick review, confirm that the photo rows show the intended order, the preview total matches the durations you chose, and the download button appears only after the local recording completes. Refreshing the page clears the temporary project.
Continue with another starting point
If your main question is conversion rather than slideshow pacing, use photo to video. For a soundtrack-led project, open slideshow maker with music or the existing video with pictures and music guide.