Height presets that apps understand
1080p, 720p and 480p are the heights messaging apps and web players expect. Aspect ratio is kept.
Resize video online to 1080p, 720p or 480p
Change output height while preserving the frame proportions.
- 100% Free
- No upload
- No login required
Why this resizer
What this tool actually does
Resize video here means a new frame height — 1080p, 720p or 480p — not a crop. The full picture stays; pixels are scaled.
Smaller pixels, not a size promise
Resize video lowers the frame. If you need “under 10 MB”, use the compressor after, or instead, of resize.
No upload queue
The file is processed in this tab. There is no encoding server, account wall, or forced watermark on the download.
Download on this device
Keep the tab open until the file is ready, then play the result before deleting the source master.
How to resize video
How to resize video to 1080p, 720p or 480p
The encoder scales the frame to the selected height with contain behavior, preserving aspect ratio, then writes H.264 video and AAC audio to MP4. It does not force a TikTok canvas or remove parts of the picture. Start with the original file instead of a copy that has already been re-encoded. Follow the steps below, keep the tab open while progress is moving, and play the downloaded result before deleting the source. This resize video workflow does not accept a remote video URL and does not fetch media from YouTube, TikTok, cloud drives, or social accounts.
Step 01
Drop the local video
Select the source video.
Step 02
Choose 1080p, 720p or 480p
Choose Source, 1080p, 720p or 480p.
Step 03
Download the scaled MP4
Check dimensions and framing before sharing.
What it is
What resizing changes in a video file
Resizing changes pixel dimensions, not the visible crop. Choose source size, 1080p, 720p or 480p when a player, upload form or device needs a smaller resolution. resize video online on this page means selecting a file you already have permission to use, completing the job locally, and downloading an MP4 at the selected maximum height. The encoder scales the frame to the selected height with contain behavior, preserving aspect ratio, then writes H.264 video and AAC audio to MP4. It does not force a TikTok canvas or remove parts of the picture.
Smaller review copies: Make 720p drafts from high-resolution masters. Older devices: Reduce dimensions when 4K playback is unnecessary. Faster messaging: Lower resolution before a separate size-target compression. Consistent handoffs: Give teammates a predictable maximum height. These are distinct reasons to resize video; they are not promises that every codec or file size will work on every device.
- Job
- resize video completes one focused local media task rather than opening a multi-track editor.
- Input
- resize video starts with a file selected from your device; URL downloading is not included.
- Output
- resize video produces an MP4 at the selected maximum height, which should be played and checked before sharing.
- Privacy
- resize video keeps media bytes in the browser processing path instead of an upload queue.
- Quality
- resize video can re-encode media, so the source master remains the quality reference.
- Compatibility
- resize video depends on the codecs and memory available in the current browser.
Height vs file size
Resize video when the destination is a frame, not a megabyte cap
Social players often request 720p. Email still cares about megabytes. Pick the lever that matches the rejection message.
1080p
Keep detail for desktop playback
Use 1080p when the clip will be watched on a laptop and the source is already that tall or taller.
720p
The usual share height
Resize video to 720p for WhatsApp-style viewing. It often helps compression later because each second has fewer pixels to fund.
480p
Aggressive downscale
480p is for tight caps or talking-head clips where motion is simple. Text-heavy screen recordings can suffer.
Not crop
Edges stay in the frame
If you need 9:16 or 1:1, use crop video. Resize never cuts left and right; it only scales.
Use cases
Good fits for resize video
Smaller review copies
Make 720p drafts from high-resolution masters.
Older devices
Reduce dimensions when 4K playback is unnecessary.
Faster messaging
Lower resolution before a separate size-target compression.
Consistent handoffs
Give teammates a predictable maximum height.
Quality
Resolution, aspect ratio and file size
Downscaling can make a file easier to encode and share, but resolution alone does not guarantee a specific megabyte size. Use the compressor when the requirement is 10MB or another exact budget. Portrait and landscape inputs keep their proportions. Browser codec support still controls whether the source can be decoded. A local browser tool cannot make lossy re-encoding mathematically lossless. Keep the master file, compare motion and audio after export, and change one setting at a time if the first result is not suitable.
A resize tool changes dimensions; a crop tool removes edges; a compressor targets bitrate and size. Choosing the correct operation avoids unnecessary re-encoding. A desktop editor remains the better choice for multi-track timelines, frame-accurate finishing, color work, subtitles, or archival masters. CompressVideo is intended for a focused resize video job where a quick local result matters more than a full editing suite.
Resize is not a size guarantee
A 720p export can still miss an 8 MB Discord cap on a long clip. Resize video first if you want the height, then compress video for the byte limit.
- Fixed height presets only.
- Aspect ratio is preserved.
- No custom width field.
- No guaranteed final file size.
Privacy
Privacy & security
The media path is local by design. Your file becomes an in-memory or temporary on-device input for browser media APIs, then the finished an MP4 at the selected maximum height is offered as a download. No account or cloud-drive password is requested. Close the tab after downloading when you use a shared computer, and follow workplace policy when a browser tool is not approved for confidential material.
Portrait and landscape inputs keep their proportions. Browser codec support still controls whether the source can be decoded. If the job fails, first try a current desktop Chrome or Edge build. Next, close memory-heavy tabs, shorten the source, or use a smaller resolution. An H.264/AAC MP4 is the most dependable fallback input for video workflows. A retry cannot fix a codec the browser cannot decode, so repeated failures with the same file usually require a compatible source export.
Practical notes
Tips for resize video
- Use 720p for general sharing.
- Do not upscale a tiny source expecting more detail.
- Use Crop for aspect-ratio framing.
- Use Compress for an MB target.
1. Select the source video. 2. Choose Source, 1080p, 720p or 480p. 3. Start the local resize. 4. Wait for MP4 encoding to finish. 5. Check dimensions and framing before sharing. The output is an MP4 at the selected maximum height. Review the file name, extension, playback, duration, dimensions, sound, and size before sharing it.
The encoder scales the frame to the selected height with contain behavior, preserving aspect ratio, then writes H.264 video and AAC audio to MP4. It does not force a TikTok canvas or remove parts of the picture. Downscaling can make a file easier to encode and share, but resolution alone does not guarantee a specific megabyte size. Use the compressor when the requirement is 10MB or another exact budget. This is the practical difference between a real browser media tool and a page that only renames a file extension. The result is produced from decoded media samples or a validated conversion path, subject to the codec support exposed by the browser and device.
Return to the tool above when you are ready to resize video. Use the source master, choose the smallest change that completes the task, and resize video once. If the result is wrong, adjust the relevant setting instead of repeatedly re-encoding the same output. This keeps the resize video workflow understandable and limits avoidable quality loss.
FAQ
Frequently asked questions
Can I resize a video for TikTok?
You can reduce resolution, but this tool preserves the original aspect ratio. Use Crop first if you need a centered 9:16 frame.
Does resizing reduce file size?
Often, but not to an exact target. Duration, bitrate, motion and audio also affect bytes.
Can I resize without losing quality?
Downscaling removes pixels and re-encoding is lossy. It can still look clean when the chosen resolution matches the viewing size.
What is the difference between resize and crop?
Resize scales the whole frame. Crop removes part of the frame to create a different composition or aspect ratio.
Is resize video online free on CompressVideo?
Yes. The video resolution resizing workflow is free and does not require an account. Processing uses your browser and the download is available when the local job finishes.
Does resize video upload or store my media?
No. The resize video job reads the selected file with browser media APIs and does not send it to an encoding server. Analytics must not include file contents, names, frames, audio, or exported media.
Which browser should I use for resize video?
Desktop Chrome or Edge is the safest choice for resize video because codec support depends on WebCodecs. Portrait and landscape inputs keep their proportions. Browser codec support still controls whether the source can be decoded.
Does resize video add a forced watermark or download paywall?
No. The resize video output has no CompressVideo stamp, and the completed download is not placed behind a subscription prompt.
Can I run this on a phone?
Mobile Safari or Chrome can open a file already on the device. Desktop Chrome or Edge is more reliable for long or high-resolution sources because WebCodecs coverage and memory are stronger there.
What input files does this page accept?
Portrait and landscape inputs keep their proportions. Browser codec support still controls whether the source can be decoded. Start with an H.264 MP4 when a special camera file fails. A remote URL or social-network link is not fetched.
Related tools
Back to the tool
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