I Built a Browser-Based YouTube Frame Extractor (No FFmpeg Required)

H3l!0s_T3k — Thu, 09 Jul 2026 01:04:23 +0000

If you've ever wanted to extract frames from a YouTube video, you've probably downloaded the video first and used FFmpeg. It works—but it's not always the fastest or simplest solution.
I wanted a tool that works entirely in the browser, with no downloads, no CLI, and no servers.
So I built YTFR: YT Fr4m3 R1pp3r, a Tampermonkey userscript that captures frames directly from the YouTube player in real time.

How it works

Instead of downloading the video again, the script captures frames that the browser is already rendering.

YouTube Video
↓
Capture Frames
↓
Store as Blobs
↓
Generate ZIP
↓
Download
Everything runs locally on your machine.

Features

Automatic frame capture at custom intervals
Manual frame capture
ZIP export with:
Extracted frames
Contact sheets
JSON reports
CSV frame metadata
Draggable UI
Automatic fallback for browsers without requestVideoFrameCallback()
Configurable memory limit to prevent crashes

Challenges

The biggest challenges were:

Handling YouTube's Single Page Application (SPA) navigation.
Supporting browsers without requestVideoFrameCallback().
Managing memory while capturing hundreds of images.
Building a movable interface that remembers its position.

What's next?

I'm planning to add:

Timestamp-based extraction
Frame comparison
Playlist batch processing

If you have ideas or feedback, feel free to open an issue or contribute.

GitHub

DEV Community: H3l!0s_T3k

I Built a Browser-Based YouTube Frame Extractor (No FFmpeg Required)