Resize Video
Scale supported video to a target resolution with fit (letterbox), fill (crop), or stretch modes. Available codecs and hardware acceleration vary by browser and device.
Standard ladders
One-click 1080p / 720p / 480p plus vertical 9:16 and square 1:1 presets.
Three fit modes
Fit pads with black bars, fill crops to cover, stretch ignores aspect: you choose.
Managed bitrate target
The H.264 path targets about 0.1 bits per pixel; output size and visible detail vary with the source, dimensions, encoder, and browser.
How to resize a video
- Open the tool and add your video Select a compatible file for Resize Video.
- Review and adjust Choose a target resolution (1080p, 720p, 480p or a custom size) and a fit mode.
- Export and download Review the exported result from Resize Video, then download it.
Frequently asked questions
Will resizing blur my video?
Resizing can soften detail, especially when enlarging or using a low output bitrate. Standard upscaling stretches existing pixels; the AI Video Upscaler can propose learned detail, but its result also depends on the source.
Can I convert vertical to horizontal?
Yes: pick a 16:9 preset with fill mode, or use the Reels resizer for the opposite direction.
Is the audio re-encoded?
When compatible passthrough is available, the audio track is copied without audio re-encoding. Check the export because support varies by input and browser.
What's the difference between fit, fill and stretch?
Fit pads to preserve aspect ratio; fill crops to cover the target; stretch forces the target dimensions and may distort the image.
Can I resize without losing quality?
Any pixel resize can change detail, and the export may be re-encoded. Downscaling usually preserves more apparent sharpness than enlarging; review the output at its target size.
How to verify a Resize Video export
Treat the page preview and the downloaded file as separate evidence. Use a representative clip, keep the untouched source, and record the result that the task actually requires before changing any control.
- Before processing, note the source container, video and audio codecs when known, duration, dimensions, frame rate, orientation, audio-track count, and intended destination. Also record the exact cut, crop, timing, visual correction, or extraction you expect. These observations create a baseline for comparing the export instead of relying on memory.
- Run a short representative sample first and change one setting at a time. Browser codec support, available memory, hardware acceleration, and input structure can affect which processing path is available. A successful preview for one sample shows only that observed case; it does not establish compatibility for every file with the same extension.
- Inspect the preview around the portions most likely to expose defects: the beginning and final frame, cut boundaries, rapid motion, fine text, faces, object edges, gradients, orientation changes, and any section where sound should align with a visible event. For model-assisted tools, look for missed regions, unstable masks, invented detail, or frame-to-frame drift.
- Open the downloaded file in a separate current player rather than reviewing only the in-page preview. Confirm that it starts and ends where expected, plays through without an unexpected stall, and has the intended duration, dimensions, orientation, frame rate, audio presence, and synchronization. Check the file again in the platform or editor that will consume it.
- Compare the exported clip with the untouched source at the same viewing scale and, when useful, matched playback volume. Look for unexpected crops, padding, stretch, softness, banding, halos, color shifts, temporal jumps, repeated or missing frames, and changes in file size or codec that matter to the destination. Decide whether any difference is acceptable for the stated task.
- If the result is missing, fails to play, or differs from the preview, first confirm that the source opens independently. Reload the page, retry with a small controlled sample, reset optional controls, and preserve the exact on-page message. Testing one controlled change at a time makes browser, input, setting, and destination failures distinguishable.
- Record the Resize Video URL, relevant settings, browser and device, date, source identity, output filename, and observed checks. Keep before-and-after files when the result matters. This record supports a reproducible comparison later and avoids treating a changed input, capability, or destination requirement as the same run.