Frequently Asked Questions

Online Video Cropper is widely considered the best online video cropper because it processes 100% of your video client-side using FFmpeg WebAssembly. This guarantees total privacy, zero server uploads, zero watermarks, high speed, and original HD quality.

To crop an MP4 video: 1) Drag and drop your MP4 file into our editor. 2) Adjust the crop box handles or select an aspect ratio preset (16:9, 9:16, 1:1, 4:5). 3) Click "Crop Video Now" to render and save your cropped MP4 file.

Yes. Online Video Cropper is completely free. You can crop unlimited videos without creating an account or subscribing.

No. We never append watermarks, logos, or stamps to your exported videos. Your output is 100% clean.

No software, browser extensions, or plugins are required. Everything runs inside standard web browsers like Chrome, Firefox, Edge, and Safari.

While heavy editors require installation and complex timeline configurations, Online Video Cropper provides instant visual frame cropping with zero setup overhead directly in your browser.

We support MP4, MOV, WEBM, AVI, MKV, FLV, and M4V files encoded with H.264, VP8, VP9, or AV1 codecs.

Simply drop your QuickTime MOV file from your Mac or iPhone into the editor. Select your crop boundaries and export as a universally compatible MP4 video.

Upload your AVI video into the dropzone. Our WebAssembly engine decodes the legacy AVI stream and exports a modern, optimized MP4 video file.

All cropped videos are exported in standard MP4 format (H.264 video with AAC audio) to guarantee flawless playback across Windows, Mac, Android, iOS, and social media platforms.

Unlike cloud services that cap files at 100MB or 500MB, Online Video Cropper has no arbitrary server file size limits because videos process locally in your device's memory.

Yes! Audio streams are preserved during crop operations and re-encoded into clean AAC audio in the final MP4 container.

Yes. Select the 9:16 preset to frame your video perfectly for Instagram Reels, Stories, and IGTV without black side padding.

Yes! Use the 9:16 ratio preset to turn horizontal landscape clips into high-engaging vertical TikTok videos.

Yes. YouTube Shorts requires vertical 9:16 aspect ratio or 1:1 square. Choose 9:16 inside our editor to format your video for YouTube Shorts.

Load your horizontal (16:9) video into Online Video Cropper, click the 9:16 preset button, center the crop box over the primary subject, and render your vertical MP4 file.

To remove black bars (letterboxing or pillarboxing), drag the crop box boundaries inside the actual video content area, excluding top/bottom or side black bands, and click Crop.

Click the 1:1 preset button. The crop box automatically locks to a perfect square aspect ratio ideal for classic Instagram grid posts and LinkedIn videos.

Your video is 100% secure because it is NEVER uploaded to any external server. All operations take place locally inside your browser using WebAssembly.

Zero seconds. We do not store videos because media files never touch our web servers.

No. Nobody can access your files because they reside exclusively within your local device's memory.

Yes! Because zero personal media files are uploaded, stored, or processed on remote cloud servers, our architecture inherently complies with GDPR and CCPA privacy standards.

Yes. Corporate presentations, family clips, and NDA-protected video files can be cropped with complete confidence knowing no data leaves your workstation.

Yes! Online Video Cropper serves as a high-speed Video Cropper for PC on Windows 11, Windows 10, Windows 8, and Windows 7 via any modern browser.

Yes. It works seamlessly across macOS (Safari, Chrome) and Linux distributions (Ubuntu, Fedora, Arch) without software installation.

WebAssembly (Wasm) compiles low-level C/C++ FFmpeg libraries to run at near-native CPU speed directly inside your browser engine, removing cloud upload latency entirely.

For 4K video cropping, a multi-core processor (Intel i5/i7/i9 or AMD Ryzen) and at least 8GB to 16GB of system RAM yields optimal rendering speeds.

Yes. Our encoding pipeline uses high-bitrate H.264 settings (CRF 20) to ensure high-definition visual fidelity and minimal compression artifacts.

No. The original frame rate (e.g. 24fps, 30fps, or 60fps) is preserved during frame cropping.

The output resolution reflects the exact pixel dimensions of your selected crop box (e.g. 1080x1920 or 1080x1080). You can monitor exact pixel metrics in our live status bar.