Is Grab a thumbnail free? Is there a watermark?

Yes — Grab a thumbnail is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.

Do my files get uploaded to a server?

No. Grab a thumbnail runs entirely in your browser with your browser's media decoder and canvas, so your MP4, MOV, WebM, MKV file never leaves your device and nothing is stored or seen by us.

What can I put in, and what do I get out?

Grab a thumbnail accepts MP4, MOV, WebM, MKV and gives you back a JPG file. You can also set timestamp and format before you run it. Actual codec support depends on what the bundled engine or browser decoder can read.

What resolution is the image?

The browser captures the decoded frame at its native dimensions. JPG is lossy; choose PNG when sharp interface text or graphics matter.

Free tools · Extract

Grab a thumbnail

Grab a still frame from a video at any timestamp and save it as a JPG or PNG — a poster image or thumbnail in one click. Browser-only.

Runs entirely in your browser. Your file is never uploaded — no watermark, no account.

Drop a file or click to chooseMP4, MOV, WebM, MKV

Get a better result

Best for: Poster frames, previews, documentation images, and social thumbnails taken from a precise moment in a browser-decodable video.
Input → output: The browser seeks to the selected timestamp and captures the decoded full-resolution frame as JPG or PNG through canvas, without loading FFmpeg.
Quality tip: Choose PNG for interface text and sharp graphics; choose JPG for photographic frames when lossy encoding is acceptable. Avoid transition blur or half-rendered animation in poster images.
Know before running: MP4/H.264 and WebM are safest because browser decoding performs the capture. MOV and MKV support varies, JPG is lossy, and near-end timestamps are clamped slightly.
Next step: ASCII art generator to turn the captured visual idea into selectable monochrome character art.

How to use Grab a thumbnail

1
Choose your file. Drop a browser-decodable video into the tool, or click to select one. It stays on your device — nothing is uploaded.
2
Choose the frame. Set a timestamp and JPG or PNG output, then press Run. Your browser seeks to that moment and captures the decoded frame.
3
Download. Review the captured still, then download it at the video's decoded resolution with no watermark.

Frequently asked questions

Is Grab a thumbnail free? Is there a watermark?: Yes — Grab a thumbnail is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.
Do my files get uploaded to a server?: No. Grab a thumbnail runs entirely in your browser with your browser's media decoder and canvas, so your MP4, MOV, WebM, MKV file never leaves your device and nothing is stored or seen by us.
What can I put in, and what do I get out?: Grab a thumbnail accepts MP4, MOV, WebM, MKV and gives you back a JPG file. You can also set timestamp and format before you run it. Actual codec support depends on what the bundled engine or browser decoder can read.
What resolution is the image?: The browser captures the decoded frame at its native dimensions. JPG is lossy; choose PNG when sharp interface text or graphics matter.