Video Resolution Converter
Convert a video to a standard resolution in one click. Choose 2160p, 1440p, 1080p, 720p, 480p or 360p; the shorter side of the video becomes that number of lines, so landscape and vertical videos are both handled correctly, and the aspect ratio is kept. Lanczos scaling keeps the result sharp, and smaller videos are never enlarged unless you allow it.
- Files stay on your device
- No sign-up
- Free to use
Resolution
The shorter side becomes the chosen number of lines, so vertical videos are handled correctly; the aspect ratio is kept.
Processing happens on your device with FFmpeg. Keep this tab open; long or high-resolution videos can take several minutes.
How to use Video Resolution Converter
- Drop a video onto the page.
- Choose the target resolution.
- Choose the scaling method.
- Convert and download the MP4.
Video Resolution Converter features
Standard resolutions
360p to 2160p (4K).
Vertical-aware
The shorter side sets the resolution.
Aspect ratio kept
Even dimensions for encoders.
Sharp scaling
Lanczos, bicubic or bilinear.
No accidental upscaling
Optional protection.
Private
Processed on your device; the video is never uploaded.
When to use Video Resolution Converter
- Making 4K phone videos smaller for sharing.
- Creating 720p versions for slower connections.
- Matching clips to a project resolution.
- Preparing videos for older devices.
Video Resolution Converter FAQ
What does 1080p mean for a vertical video?
For a vertical video, 1080p means 1080 pixels wide (1080 × 1920). The tool always applies the number to the shorter side.
How is this different from the Video Resizer?
The resizer targets exact sizes and social formats with cropping or padding. This converter steps between standard resolutions and keeps the shape.
Will the file be much smaller?
Usually: 1080p has about half the pixels of 1440p and a quarter of 4K, and the encoder needs correspondingly fewer bits.
Which scaling method is best?
Lanczos for the sharpest result when downscaling; bilinear is softer but faster.
Why does the first run take longer?
The media engine, FFmpeg compiled to WebAssembly (about 32 MB), is downloaded once and then cached by your browser.
Is my video uploaded?
No. FFmpeg runs as WebAssembly in your browser, so the video stays on your device.
Standard video resolutions
Video resolutions are commonly named by their number of lines: 720p, 1080p, 1440p and 2160p, the latter also called 4K UHD. For widescreen video, 1080p is 1920 × 1080; for vertical video recorded on phones, it is 1080 × 1920. Naming by the shorter side keeps the terminology consistent for both orientations.
Reducing resolution is one of the most effective ways to make videos smaller and easier to play. A 4K recording has four times the pixels of 1080p, and most screens and platforms show it at 1080p or less anyway. Scaling down before sharing saves time and bandwidth without a visible loss on typical screens.
The converter calculates the new width from the aspect ratio and rounds both dimensions to even numbers, which H.264 requires. Lanczos resampling considers a wide neighbourhood of pixels for each new pixel, producing crisp results without the jagged edges of simpler methods.
Enlarging a video cannot add detail, so by default videos smaller than the target are left at their size. You can switch this off when you need a fixed resolution.
Conversion runs entirely in your browser.