Thumbnail Generator
Capture evenly spaced frames from any video right in your browser. Drop a file or pick one locally, adjust resolution, and optionally add a watermark to every thumbnail.
Drag & Drop your video
Everything is processed locally in your browser. No uploads.
Applied to every generated thumbnail.
Drop a video or choose one above to see evenly spaced frames.
Generate Video Thumbnails and Sprite Sheets in Your Browser
Shortify's thumbnail generator extracts evenly spaced frames from any video and lets you download individual thumbnails or a combined sprite sheet. All processing runs in your browser — no upload, no server, complete privacy.
Perfect for creating preview thumbnails for video libraries, building hover-preview sprite sheets, or extracting key frames for social media posts and presentations.
How It Works
- Upload a video. Drag and drop any MP4, WebM, or MOV file.
- Configure. Set the number of thumbnails, resolution, and optional watermark.
- Generate. Frames are extracted at equal intervals. Download individual frames or a sprite sheet.
Use Cases
- Video libraries: Generate poster thumbnails for content management systems.
- Hover previews: Build sprite sheets for timeline scrubbing on web players.
- Social media: Extract the best frame for a YouTube thumbnail or Instagram post.
- Presentations: Pull key frames to illustrate video content in slides or docs.
Frequently Asked Questions
You can generate any number of evenly spaced thumbnails from your video. Common choices are 5, 10, 20, or 50 frames.
A sprite sheet combines multiple thumbnails into a single image grid. It is commonly used for video timeline hover previews on websites and apps.
Yes. The thumbnail generator includes an optional watermark feature. You can overlay a logo or text on every generated frame.
No. All frame extraction happens in your browser. Your video never leaves your device.
You can set the output resolution. Common choices include 640px, 1280px, or full source resolution.
Thumbnails are exported as JPG or PNG files. Sprite sheets are exported as a single PNG.
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