Video Thumbnail & Storyboard Studio for Better Cover Selection
Generate 8–20 local candidate frames from an MP4, MOV, or WebM video, select a useful cover, export a PNG/JPG/WebP frame or contact sheet, and continue locally to crop or compress. Keep source files under the 500MB browser limit.
Drop video here or click to upload
MP4, MOV, WEBM, and other browser-readable videos work best.
Max file size: 500MB
No video uploaded
Mobile processing guidance
On mobile, start with a short MP4/MOV/WebM and a 1280px export cap.
Max 500MB, but mobile browsers are safer with short clips.
Frame capture depends on browser video decoding and canvas memory, not FFmpeg.
If capture fails, retry with another timestamp, a smaller source, or JPG/WebP output.
File limit
Use files under 500MB. Mobile browsers are more reliable with short clips.
Browser codec support
Frame capture depends on whether the browser can decode the selected video.
Publishing use
Use PNG for UI clarity, JPG for broad sharing, and WEBP when the platform supports it.
Thumbnail output presets
Start from the destination, then fine-tune timestamp, format, quality, or width.
Current output PNG
Storyboard candidates
Generate 8-20 evenly spaced local previews, choose the useful frames, then export one frame or a contact sheet.
Move the video playhead or enter a timestamp. Capture uses the frame at that time.
Frame export note
A captured frame is a still image, not a video thumbnail track. Use PNG for sharp UI frames, JPG for broad compatibility, and WEBP when browser support is available.
Keep this on for web-ready thumbnails. Turn it off to export the native video frame size.
Next step
Choose a browser-readable video first, then move the playhead to a clear frame.
Output format
PNG
Frame time
0:00
Output size
1280 x 720px
This tool is designed for browser-side frame extraction based on the current public implementation. Browser support depends on the file codec and container, so unsupported formats show a message.
A video thumbnail extractor captures one still frame from a video and saves it as an image.
Use it to extract a frame from MP4 or WebM, make a video screenshot, prepare a cover image, or avoid an automatic blank first frame.
This version works with local browser-readable files and keeps source videos under 500MB for more stable tab behavior.
Use browser-readable video under 500MB
MP4, MOV, and WEBM are the safest choices, but support still depends on codec, browser, and device memory.
Pick a meaningful frame
Use the playhead, slider, and output presets to avoid black intros, fade transitions, motion blur, or oversized thumbnails.
PNG for crisp screenshots
Useful when UI text, charts, or product details need sharp edges.
JPG for broad compatibility
A good fit for simple video covers, email attachments, and older upload forms.
WEBP for lighter web previews
Works well when your browser supports export and the thumbnail is destined for a web page.
Choose a representative MP4 frame
Open a local MP4, move to the strongest visual moment, then export a JPG or WEBP cover.
Capture an exact frame for review
Use the timestamp slider or seconds input when you need a precise frame for docs, QA notes, or release posts.
Prepare a cover for publishing
Choose the social cover preset, then compress or resize the exported image for the publishing surface.
Capturing a blurry transition
Pause on a stable frame instead of a fade, motion blur, or fast camera movement.
Assuming every codec opens
The browser must decode the video before capture. Unsupported containers or codecs should be converted first.
Exporting thumbnails too wide
A full-resolution frame can be unnecessarily large. Start from a docs, social, or web preset before downloading covers.
Pasting a video URL
This tool works with local video files. Download or export the clip first when the source is an external platform URL.
Suggested workflow
Build a video cover workflow
Extract a frame, tune the image, then optimize it for the page or platform where it will appear.
Guides and examples
Use this tool in a real workflow
How is the thumbnail extracted?
The current public implementation is designed to load the video in the browser and draw the selected frame to a canvas. Avoid sensitive files unless you have reviewed the implementation.
Which video formats work?
Browser support depends on the video container and codec. MP4, MOV, and WEBM are common choices, while MKV, AVI, or uncommon codecs may fail in some browsers.
Can I compare several video frames before exporting?
Yes. Generate 8 to 20 evenly spaced candidate frames, select one or several, then export a full-size frame or a contact sheet.
Which thumbnail preset should I start with?
Use Docs screenshot for crisp UI frames, Social cover for broad upload compatibility, Web preview for lighter WEBP assets when supported, and Original frame when you want the native video frame size.
Which image formats can I export?
The tool exports PNG and JPG in modern browsers and checks whether WEBP export is available before enabling that option.
What is the file size limit?
The first version accepts source videos up to 500MB for thumbnail extraction. Larger files may be possible in some browsers, but the initial limit keeps mobile and desktop tabs more stable.
Is this the same as video conversion or compression?
No. This page extracts still images from video. Video conversion, trimming, and compression are separate workflows because they require heavier browser-side processing.