Stream Tester Beta
Play an HLS, DASH, or MP4 stream URL and see real playback stats — resolution, bitrate, and buffer health. Runs entirely in your browser — nothing is uploaded.
Starts muted (browser autoplay policy) — use the speaker icon in the player to unmute.
Player info
How it works
- Paste an HLS (.m3u8), DASH (.mpd), or MP4 URL, or use the pre-filled example.
- Pick the matching player tab — HLS, DASH, or MP4 — and click Play.
- Watch the info panel update live: playback engine, resolution, bitrate, segment length, bandwidth estimate, buffer health, and dropped frames.
- Switch URLs or player types as many times as you like — nothing is saved between plays.
Frequently asked questions
Is my stream URL uploaded or stored anywhere?
No. The player loads the stream directly from its own source, the same way any video player would — the URL only ever goes from your browser to that stream's server, never to Gotool.xyz.
A stream plays fine elsewhere but fails here — why?
Almost always CORS: the stream's own server has to allow being loaded from a different site's page, and not every stream host sets that up. That restriction is enforced by your browser, not by this tool, so it isn't something this page can work around.
What's the difference between the HLS, DASH, and MP4 tabs?
They're different streaming formats. HLS (.m3u8) and DASH (.mpd) are adaptive formats used for most live and on-demand streaming; MP4 is a single progressive file. Pick the tab that matches your URL's format.
Why does the video start muted?
Browsers block audio autoplay by default — use the speaker icon in the player controls to unmute once it's playing.
What does the LIVE badge mean?
It shows automatically when the loaded HLS playlist reports itself as a live (not video-on-demand) stream.
Your files are never uploaded. Gotool.xyz runs entirely as JavaScript in your browser. Your files are processed in memory and never touch a server — nothing to breach, nothing to clean up. Close the tab and it's like it never happened. The only thing we count is which tool ran (just the name, e.g. "merge") so we know what people find useful — never your file, its name, its size, or anything in it.
