Click to choose a file or drag a video here
Pick an effect
Trim (optional)
Every effect except Slow Motion, Fast Forward, and Reverse keeps your original audio untouched. Those three are silent by design — changing playback speed or direction without also correctly re-timing the audio would make it sound wrong, and re-timing audio reliably requires assuming your clip actually has an audio track, which isn't always true (screen recordings, for example). Reverse specifically has to hold the entire clip in memory before it can play it backward, so it's best kept to short clips — trim first if yours is long. Runs on a real video engine loaded into your browser (FFmpeg, compiled to WebAssembly) — about 30MB, downloaded once and cached for the rest of this visit. Nothing is uploaded; the work happens on your device.
How it works
- Upload the video you want to transform.
- Choose from 20 effects like slow motion, reverse, glitch, or mirror.
- Apply the effect and download your video.
Frequently asked questions
Can I preview an effect before exporting?
Yes, the effect applies so you can review the result before downloading.
Will effects work on any video length?
Yes, though longer videos take more time to process.
Can I apply more than one effect?
Apply one effect per export; run the result back through for a layered look.
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.