Free Video Thumbnail Generator

Upload a video, scrub to any frame, and download it as a PNG or JPG thumbnail. No signup, no watermark, runs in your browser.

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Thumbnail generator — coming soon

ReplayFlow lets you scrub through recordings and take frame captures directly in the app.

How to generate a video thumbnail

Upload your video

Click 'Choose file' and select your MP4. The video loads in your browser — nothing is uploaded to a server.

Scrub to the right frame

Use the scrubber to find the frame you want to use as a thumbnail. Step forward or backward frame-by-frame for precision.

Download as PNG or JPG

Click 'Capture frame' and choose your format. The thumbnail downloads immediately.

→Choose a frame where all relevant UI is visible — avoid frames where a dropdown is half-open or a tooltip is covering content
→For product demo thumbnails, use a frame that shows the product in its best state, not a transition or loading state
→For bug report videos, use a frame that clearly shows the broken state so the bug is obvious from the thumbnail
→Add text overlays in Canva or Figma after downloading if you need a labelled thumbnail for YouTube

Video Trimmer

Trim your recording before grabbing a thumbnail

MP4 to GIF

Convert a short clip to GIF

Screen Recorder Online

Record a fresh clip

Is the thumbnail generator free?

Yes. No account, no watermark, no file size limits (within browser memory). Download as PNG or JPG.

What video formats are supported?

MP4 (H.264) is supported across all modern browsers. WebM also works in Chrome and Firefox.

Can I generate a thumbnail from a screen recording?

Yes. Upload your screen recording MP4, scrub to the frame that best represents the video, and download it as a thumbnail.

What resolution will the thumbnail be?

The thumbnail is exported at the native resolution of your video. If your recording is 1920×1080, the thumbnail will be 1920×1080.

What size should a video thumbnail be?

For YouTube: 1280×720 (16:9). For Open Graph / social sharing: 1200×630. For most other use cases, the native video resolution works well.

Download ReplayFlow free — no signup, no subscription, no time limits.

Free forever · One-time Pro upgrade · Windows 10/11