How to Crop a Video Free Online

You can crop a video free online by loading your file into a browser tool that trims unwanted edges and exports the result without sending data anywhere.

Choosing the right starting format

Pick an input that matches your source. MP4 files from phones or cameras work directly. If your clip came from a different container try converting first with the MP4 to GIF utility to test a short segment.

A 1080p ten-minute clip often starts at 180 MB. After cropping to the middle two minutes the file drops to roughly 35 MB while keeping the same resolution and frame rate.

Step-by-step cropping process

Open the video tool page and select your file. The interface shows a timeline where you drag the start and end markers. Preview plays only the selected range so you see exactly what stays.

Set the crop rectangle by entering pixel values or dragging handles on the preview. Common values for removing letterbox bars are top 120 bottom 120 on a 1920 by 1080 frame.

Click the export button. The browser finishes the job locally and downloads the new MP4. No account is created and the original file never leaves your computer.

Handling different aspect ratios

Vertical phone footage needs different margins than horizontal clips. A 9:16 clip cropped to 1:1 square uses left 240 right 240 on a 1080 wide frame. Test one small section first.

Video format comparison

Use this table to decide output settings that keep quality while shrinking size.

Format	Container	Bitrate range	Best for	Typical size for 2 min 1080p
MP4	MP4	4-6 Mbps	General sharing	60-90 MB
WebM	WEBM	3-5 Mbps	Web playback	45-70 MB
MOV	MOV	5-8 Mbps	Editing suites	75-110 MB

Keeping files private during edits

Every conversion at Toolsly happens inside the browser using WebAssembly. Payment details or personal footage never reach a server. This matters when you work with interview clips or internal product demos.

If you later need to combine the cropped clip with other shots use the PDF Combine pattern but adapted for video sequences on the video category page.

Real world example with numbers

Start with a 4K 30-second drone shot recorded at 100 Mbps. The raw file weighs 180 MB. After cropping to the central 12 seconds and exporting at 1080p the result is 22 MB. Playback on a laptop shows no visible quality loss at normal viewing distance.

Another test used a 720p webinar recording. Removing the first and last 45 seconds reduced duration from 18 minutes to 16 minutes and cut file size from 420 MB to 370 MB.

Export options and limits

Most browser tools support up to 4K output when your device has enough RAM. Frame rates stay at 30 fps for smooth results. Higher rates like 60 fps are possible but increase final size by about 40 percent.

If the source uses a rare codec the tool may prompt a quick re-encode. This step still runs locally and usually finishes in under a minute for clips shorter than five minutes.

Link to the full set of video utilities at category/video when you need additional steps such as audio extraction or format changes.

Testing before final export

Always preview the last two seconds of your crop. Small timing errors become obvious only at the end. Adjust the end marker by one or two frames if the action feels abrupt.

Save presets for common crop sizes. A 16:9 to 4:5 conversion for Instagram uses top and bottom margins of 135 pixels on 1080 height footage.