How to Download an M3U8 Stream and Save It as MP4 (2026)

You found an .m3u8 link and hit save — and got a tiny text file instead of a video. That's expected: .m3u8 is a playlist for an HLS stream, not the video itself. Here's how to turn it into a real MP4, from the one-click browser-extension method to the ffmpeg command line.

The quick answer

Fastest path: if the stream is playing on a web page, the Clipmoth browser extension auto-detects the HLS stream and saves it as one MP4 in a click — you don't even need to find the .m3u8 URL. If you already have the raw .m3u8 link and don't mind a command line, ffmpeg turns it into an MP4 in one command. Both fetch every segment and decrypt AES-128 automatically. Both are covered below.

What an .m3u8 file actually is

HLS (HTTP Live Streaming) is the format most news, live and video-on-demand sites use. Instead of one big file, the video is chopped into hundreds of short .ts (or .m4s) segments. The .m3u8 file is just a text playlist listing those segments in order — sometimes with an AES-128 key to decrypt them.

So "downloading the m3u8" really means: read the playlist, download every segment, decrypt them if they're encrypted, and join them into one MP4. A tool does all of that for you.

Method 1 — The browser extension (easiest)

If you can play the video on a page, this is the simplest route — and you don't have to hunt for the .m3u8 URL at all:

Install the Clipmoth extension from the Chrome Web Store (free).
Open the page and start the video you want.
Click the Clipmoth icon — it detects the HLS stream, downloads every segment, decrypts AES-128 on the fly, and saves one MP4. No watermark, nothing uploaded.

Because it works from the page you're already on, there's nothing to copy or paste. If a site blocks it, or you only have a raw .m3u8 link with no page to play, use ffmpeg (Method 2) or the Windows desktop app.

Method 2 — ffmpeg (command line)

If you have ffmpeg installed, one command turns an m3u8 into an MP4:

ffmpeg -i "https://example.com/stream.m3u8" -c copy output.mp4

The -c copy part re-packages the segments without re-encoding, so it's fast and lossless. For an AES-128 stream, ffmpeg handles the decryption automatically as long as the key is reachable from the playlist.

This is the most reliable method for tricky streams, but it's a terminal tool. If you'd rather not touch a command line, Method 1 (or a desktop app) does the same thing behind a button.

How to find the .m3u8 URL

If you only have the web page, not the raw stream link, grab it from your browser's developer tools:

Open the page and start playing the video.
Open DevTools (F12) and go to the Network tab.
In the filter box, type m3u8.
Reload if needed — the request that appears is your playlist URL. Right-click → Copy → Copy link address.

Some sites load a "master" playlist that points to several quality variants; copying the master link is fine — a good tool (ours included) will pick the best variant for you.

When an m3u8 won't download

Live streams — an ongoing live has no end yet; you can only capture what's aired so far, and many tools refuse until it ends.
DRM (Widevine/FairPlay) — Netflix, Prime Video and similar wrap HLS in DRM. No legitimate tool can save those, and you shouldn't try.
CORS-blocked — some sites block cross-origin browser fetches; a desktop tool (or our Windows app) isn't bound by browser security rules and can usually still save it.
Expired/signed URLs — many m3u8 links are time-limited. If it worked a minute ago and now 403s, re-copy a fresh link.

Legal note: Only download streams you have the right to save — your own content, Creative Commons material, or content whose owner permits it. Respect copyright law and each platform's terms of service. Don't use any tool to circumvent DRM.

Frequently asked questions

Why did my .m3u8 download save as a text file?

Because .m3u8 is a playlist, not the video. It's a text file listing the stream's segments. To get an actual video you need a tool that reads the playlist, downloads all the segments, and joins them into an MP4 — like the Clipmoth browser extension or ffmpeg.

Can I convert m3u8 to MP4 without the command line?

Yes — the Clipmoth browser extension does it with a click when the stream is playing on a page, no terminal needed and nothing uploaded. If you have only a raw .m3u8 URL, ffmpeg is the most reliable one-command option.

Does it handle AES-128 encrypted streams?

Yes. Many HLS streams use AES-128 encryption; the key is usually referenced in the playlist itself. Both the Clipmoth extension and ffmpeg fetch that key and decrypt the segments automatically.

Why does my m3u8 link give a 403 error now?

Many streams use signed, time-limited URLs. Once the token expires the link returns 403. Reload the page, start the video again, and copy a fresh .m3u8 URL from the Network tab.

Got HLS streams to save? One click.

The Clipmoth browser extension turns the HLS stream playing on a page into one clean MP4 — AES-128 decryption included, nothing uploaded, no URL hunting. Need YouTube, 4K or playlists too? One $9.99 lifetime key covers the Windows app as well.

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