Video Aspect Ratio Adjustment Tool

Professional video aspect ratio calculator and adjustment tool, supporting multiple common ratio presets and batch conversion of video dimensions.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

Return to old version

Select videos first, then set the target aspect ratio and fit mode. Confirm to start processing. For batch uploads, only the first 20 files are shown, but all videos in the queue will be processed.

Select or drop video files

Supports common videos like MP4, MOV, MKV, WebM, AVI, WMV, FLV, M4V, and TS.

Click to select videos, or drop files here Files stay on this device for processing and are not uploaded to the server.

File Queue

Only first 20 shown

Videos

0 B

Total Size

Shown

Hidden

No video files selected.

Target Aspect Ratio

Use a platform preset or enter a custom width and height.

Output Width (px)

Output Height (px)

Fit Mode

Padding color

Aspect tip

Aspect lock

Aspect ratio calculator Enter width or height to auto-calculate by the locked ratio

Calculate ratio

Custom ratio

Calculate width (px)

Calculate height (px)

Result

Preview

Show fit

1920 x 1080

Padding keeps the full frame; crop fills the target ratio; blur background suits portrait-to-landscape or landscape-to-portrait.

Output and encoding settings

Save common settings before batch processing.

Output format

Video quality

Encoding speed

Frame rate

Audio processing

Audio bitrate

ZIP filename

MP4 playback optimization

Processing engine

Keep some metadata Compress ZIP Add processing report to ZIP Auto-fix to even dimensions

Output files use the original filename by default. When the format changes, only the extension is replaced. Duplicate names get a number appended.

Confirm and start

Before starting, confirm the aspect ratio and output settings are complete.

Pending

0 items

Target ratio/size

16:9 / 1920 x 1080

Output format

MP4

Results

0 items

Complete the settings first, then click Start.

Result preview

Show first 6

Video previews will appear here after processing.

Instructions

Software Instructions

Select video files: Click the “Select Video” area to upload the video files you want to adjust. Batch selection is supported for common formats such as MP4, MOV, WebM, AVI, and MKV.
Set the target aspect ratio: Go to the “Set Ratio” page and choose presets such as 16:9 landscape, 9:16 portrait, 1:1 square, 4:5 vertical, 4:3 standard, and 21:9 widescreen, or manually enter the output width and height.
Use the ratio calculator: Select a ratio in the ratio calculator, enter the width or height, and the other value will be calculated automatically. Click “Apply to Output Size” to sync it to the processing parameters.
Select the frame fitting method:
- Keep the full frame and add padding: Keeps the original frame complete and fills blank areas with the specified color.
- Fill the frame and crop: Maintains the aspect ratio and fills the target size; edges may be cropped.
- Stretch to target size: Forces the video to fit the target width and height; the image may be distorted.
- Keep the full frame with a blurred background: Keeps the main frame and fills blank areas with a blurred background.
Configure output settings: You can set the output format, video quality, encoding speed, frame rate, audio processing method, ZIP file name, and save commonly used settings.
Start processing and download: After confirming the parameters, click “Start Adjusting Aspect Ratio”. When processing is complete, you can preview the first 6 results and click “Download All Results ZIP” to get all files.

FAQ

A: Common ratios include 16:9 landscape, 9:16 portrait, 1:1 square, 4:5 vertical, 4:3 standard, and 21:9 widescreen. Different platforms and placements have different ratio requirements, so choose based on your publishing scenario.

A: Padding keeps the full frame and adds a background; cropping fills the target ratio but may cut off the edges; stretching forces the video into the target size and may distort the image. If you need to preserve the main content, padding or a blurred background is recommended.

A: No. Video processing is completed on the current device, and files are not uploaded to the server. Once processing is complete, you can directly download individual files or a ZIP archive.

A: Processing results use the original file names by default, and only the extension is replaced when the output format changes. If duplicate file names are encountered, a number is appended to the file name to distinguish them, and all files are packaged together as a ZIP download.

A: Some video encoding formats require even width and height values. Enabling automatic correction can reduce encoding failures, playback issues, or format compatibility problems.

A: Video processing uses CPU and memory. You can reduce the output size or quality, choose a faster encoding speed, reduce the number of files in each batch, or close other resource-intensive programs before processing.