Take your finished content live with Upstream.
Start streaming freeVideo Resizer
Resize a video for YouTube, Shorts, Reels, TikTok or a square post. The whole frame stays in view, with bars added where the shape changes.
- No sign-up
- Free download
- No watermark
- Files stay on your device
How to resize a video
- 1
Add your video
Drop in an MP4, MOV, WebM and M4V file.
- 2
Pick the size
Choose a landscape, vertical, square or portrait size for the platform you are posting to.
- 3
Download the resized video
Check the result on the page, then save the MP4.
Why use this video resizer
Private by design
The file is processed inside your browser. It is never uploaded to Upstream or anyone else.
Free, with no watermark
No account, no trial and nothing stamped on your video. Use it as often as you like.
Fast on your own device
There is no upload or queue. Processing starts right away and uses your computer, not a server.
Works with common formats
Start from MP4, MOV, WebM, M4V files and download an MP4 that plays everywhere.
Popular uses
- Turn one promo into Shorts, Reels, and TikTok cuts.
- Resize trailers for landscape stream intros.
- Prep vertical videos for creator marketing campaigns.
FAQ
Video Resizer FAQ
Files, privacy, formats and limits.
More free video tools
All free tools- Video Trimmer Cut a clip down to the exact segment you want without uploading it anywhere.
- Video Cropper Crop a video to the frame you need for landscape, vertical, square, or portrait publishing.
- Remove Audio from Video Strip the audio track out of a video to create a clean silent asset for live production.
- Video Compressor Reduce file size while keeping your video ready for streaming, sharing, and scheduling.
- Video Speed Changer Speed up or slow down a clip while keeping its video and audio aligned.
- Video to MP4 Converter Standardize video files into a stream-friendly MP4 output that is easy to reuse.
- Video to GIF Converter Convert a short MP4, MOV, or WebM clip into a looping GIF without uploading the source file anywhere.
- Loop Video Repeat a clip several times to create a longer asset for live playback or scheduled scenes.
From quick prep to full streaming workflows
These free utilities cover the small jobs around content creation. For continuous channels and team production, Upstream also supports 24/7 live streaming, pre-recorded live streams, multistreaming, and Live Studio broadcasts.
For this tool, the closest next step is multistreaming, so that workflow appears first below.
Send one feed to every platform that matters.
Go live to YouTube, Twitch, Kick, Facebook, Rumble, and custom RTMP without making your upload connection carry every copy.
Explore multistreaming
Run a 24/7 live stream from your videos.
Upload once, build a playlist, and let Upstream run continuous live playout without OBS, a VPS, or an always-on computer.
Explore 24/7 streaming
Schedule finished videos as live events.
Turn recordings into scheduled live streams, premieres, loops, and recurring broadcasts from the same cloud workflow.
Explore pre-recorded streaming
Produce browser-based live shows with guests.
Invite speakers, share screens, manage scenes, and add branded overlays for podcasts, webinars, interviews, and launches.
Explore Live Studio