What video formats are supported?

Whatever your browser can play — typically MP4 (H.264/H.265), WebM, and MOV. Some exotic codecs may not decode; try MP4 if a file won't load.

How are the thumbnails spaced?

Evenly across the video. If you pick 20 thumbnails from a 20-minute video, you get one roughly every minute, taken at the midpoint of each segment so you avoid black intro/outro frames.

What's a contact sheet?

A single image showing every thumbnail in a grid with its timestamp — the format you often see on movie sites and DVD menus. Great for previews, chapter overviews, and shot lists.

Free users can process videos up to 100 MB and generate up to 12 thumbnails per run. Pro users ($5/month) can go up to 200 thumbnails and any file size their browser can handle.

Why do very long videos take a moment?

The browser has to seek and decode a frame for each thumbnail. This is fast for short clips and scales linearly with the number of thumbnails you request.

Generate video thumbnails

Generate video thumbnails online — extract frames from MP4, WebM, or MOV and download as a ZIP or contact sheet, all in your browser.

Drop a video, or click to browse

MP4, WebM, MOV — anything your browser can play. Up to 100.00 MB and 12 thumbnails on free.

What people use it for

Build a contact sheet preview for a movie, episode, or long recording.
Grab evenly-spaced screenshots from a tutorial or webinar for notes.
Pick a YouTube or podcast cover frame without opening a video editor.
Create storyboard-style previews for editors and clients.
Generate chapter thumbnails for a course or documentation site.
Extract frames from gameplay, dashcam, or drone footage for reports.

This free video thumbnail generator lets you extract frames from a video online without uploading a single byte. Drop an MP4, WebM, or MOV, choose how many thumbnails you want, and the tool generates evenly-spaced screenshots you can download as a ZIP of images or as a single contact sheet.

It works as a quick video to thumbnails converter, a movie contact sheet maker, and a private alternative to desktop tools like VLC, FFmpeg, or MoviePrint when you just want a fast preview grid without installing anything. Because everything runs in your browser using the built-in HTML5 video engine, your footage never touches a server — ideal for confidential recordings, client material, drone or dashcam clips, and unreleased edits.

Common uses include building chapter previews for long tutorials, picking a cover frame for YouTube, generating storyboards from raw footage, creating episode overview sheets, and pulling stills from gameplay or webinar recordings. Pro members can generate up to 200 thumbnails per run from videos of any size their browser can play; free users can process videos up to 100 MB and up to 12 thumbnails at a time, 3 times a day.

How it works

1
Drop your video
Drag an MP4, WebM, or MOV into the box, or click to browse. It stays on your device.
2
Pick how many thumbnails
Choose 1–200 evenly-spaced frames, an output format, and whether you want a ZIP of images or a single contact sheet.
3
Download
The browser seeks to each timestamp, draws the frame to a canvas, and hands you the images — all locally, no server round-trip.

Frequently asked questions

No. Frames are grabbed locally by seeking the HTML5 video element and drawing to a canvas. The file never leaves your device.

Want this converter on your website?

Pro members can embed any Minitooler converter on their own site — styled to match, with no branding beyond a small credit link. One iframe, unlimited use, still 100% in the browser.

Unlock embeds — $5/mo

Accent color

Theme

Background

Text color

Width

Height

Embeds are a Pro feature

Upgrade to unlock a customizable iframe snippet you can paste into any website — colors, theme, and size all tuned to match your brand.

Go Pro — $5/mo

What people use it for

How it works

Drop your video

Pick how many thumbnails

Download