Are files uploaded for this tool?

This browser tool processes the selected media locally on this device. The file is not uploaded to ArtPlayer servers for this workflow.

Will the export have a watermark?

No. ArtPlayer browser tools do not add watermarks to exported files.

The work runs in your browser, so speed depends on your device, browser, memory, source size, and the export settings needed for the result.

Recent Chrome, Edge, and other modern Chromium browsers usually work best for heavier browser media processing.

Try a smaller source, close other heavy tabs, reduce resolution or duration first, and keep the tab open until the export finishes.

It creates preview thumbnail sprites plus WebVTT or config data for ArtPlayer-style hover previews.

It samples frames from the source video in the browser to build the sprite output.

It creates a PNG sprite sheet and WebVTT timing cues for previews along a player seek bar. For a single still image, use Video Screenshot.

Video preview thumbnails usually need image sprites plus timing metadata, not just a single image.

Browser video tool

Local processingSprite PNGNo upload

Create thumbnail sprites and WebVTT cues for player seek previews. Set the frame count and grid, then export PNG and ArtPlayer configuration locally.

Source video

Drop a file here, or click to choose

Thumbnail range0:00.0

Start

End

Count60

Thumb width160px

Columns10

Three steps to finish the browser workflow.

1
Upload Your File
Choose the source file for Video Thumbnail Sprite Generator from your device.
2
Adjust Settings
Review the preview and tune the options for the result you want.
3
Preview and Download
Check the finished result, then download the exported file.

Core details about privacy, browser support, output, and practical limits before you start.

The selected video is sampled locally in this browser without the shared FFmpeg task page.

Generate one PNG grid that ArtPlayer can use for seek-bar preview thumbnails.

Copy the ArtPlayer config or download a matching WebVTT cue file for other players.

Check supported inputs, output formats and usage requirements before you start.

Supported input	Video files such as MP4, MOV and WebM. Container and codec support depends on the browser and processing runtime.
Output result	A PNG thumbnail sprite with WebVTT timing data and ArtPlayer configuration.
Processing and privacy	Processing runs on this device. Source media is not uploaded for this workflow.
Browser requirements	A browser with the decoding and encoding capabilities needed by the selected media. Available codecs vary by device.
Usage limits	Processing capacity depends on duration, dimensions, codecs, settings and available device memory. Large inputs can fail; keep the original file.
Why does this export more than one file?	Video preview thumbnails usually need image sprites plus timing metadata, not just a single image.