Runs in your browser
Resize video
Change your video's resolution or aspect ratio with platform presets for TikTok, Instagram, and YouTube, or an exact custom size. No upload, no watermark.
Drop · pick · paste
Drop a video to start
Your file stays on this device. Nothing uploads.
How it works
- 1
Add your video
Drop, pick, or paste a file. It stays on your device.
- 2
Pick a size
Choose 9:16 for TikTok, 1:1, 16:9, 720p, or type an exact width and height, then decide whether to fill the frame or letterbox.
- 3
Download
Save the resized MP4. No watermark, no signup.
Why nothing uploads
Other tools send your video to their servers, which costs them money per file, so they add watermarks, cap file sizes, and make you sign up. This tool does the work right here in your browser using your own device. Your file is never uploaded, so there is no wait, no watermark, no size limit, and no account.
Questions
- How do I make a video 9:16 for TikTok or Reels?
- Pick the 9:16 preset (1080×1920). "Fill" crops the sides of a landscape clip to fill the phone screen; "Fit" keeps the whole picture and adds bars instead.
- Can I change the resolution to 720p or 1080p?
- Yes. Use the 720p preset or a custom size like 1920×1080. Lowering the resolution also makes the file smaller.
- Will resizing distort my video?
- No. The picture is never stretched: it's either cropped to fill the new shape or letterboxed to fit, whichever you choose.
- Does my video get uploaded?
- No. Resizing happens in your browser; your file never leaves your device.
- Is there a watermark or size limit?
- No watermark, no signup, no size cap.
More tools
Trim video
Cut with a visual timeline. Instant copy or precise re-encode.
Trim it →
Mute video
Remove the audio track. Instant and lossless.
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Rotate and flip video
Rotate 90, 180, 270, or mirror horizontally and vertically.
Rotate it →
Change video speed
Speed up or slow down, from 0.25x to 4x, audio included.
Change speed →