# Video Resize & Crop - Scale MP4 Online Scale width/height and optionally crop with w:h:x:y in your browser ### Input & Geometry Video file MP4 / WebM / MOV Scale width _e.g. 1280_ Scale height _auto if empty_ Crop W Crop H Crop X _0_ Crop Y _0_ Resize / Crop Clear Scale first, then crop · local browser processing · Max ~100 MB ### Result Preview Result appears here ## What is Video Resize and Crop? Video Resize and Crop changes frame size. Scale to a width/height, crop a rectangle, or both, then export MP4 with local browser processing in your browser. Resize helps when 4K captures must become 1080p or when platforms enforce dimensions. Crop helps for vertical cutouts, removing chrome, or focusing a subject. Local processing keeps unreleased UI and classroom footage off anonymous crop sites. You enter numbers rather than dragging a marquee-ideal when you already know the pixel box. Pair with compress and trim tools for a complete private prep pipeline. Small media chores still burn calendar time when every task means a new desktop project. (note 1). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Working inside a browser memory budget nudges you toward shareable source sizes from the start. (note 2). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Visible status lines prevent the false assumption that a tab froze during a long encode. (note 3). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Resetting the form between exports stops stale previews and wrong filenames from sneaking through. (note 4). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Chaining ToolComb video pages creates a private pipeline without creating yet another SaaS account. (note 5). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Spot-checking on phone and laptop screens reveals soft text and pacing issues early. (note 6). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Naming downloads with clear suffixes makes it easier to find the latest take in a busy folder. (note 7). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Prefer the simplest setting that meets the requirement; extra knobs often invite accidental quality loss. (note 8). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. If a job fails, shrink the source or simplify options before assuming the browser is broken. (note 9). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Document the settings you used when a result looks perfect so the next episode matches. (note 10). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Small media chores still burn calendar time when every task means a new desktop project. (note 11). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Working inside a browser memory budget nudges you toward shareable source sizes from the start. (note 12). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Visible status lines prevent the false assumption that a tab froze during a long encode. (note 13). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Resetting the form between exports stops stale previews and wrong filenames from sneaking through. (note 14). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Chaining ToolComb video pages creates a private pipeline without creating yet another SaaS account. (note 15). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Spot-checking on phone and laptop screens reveals soft text and pacing issues early. (note 16). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Naming downloads with clear suffixes makes it easier to find the latest take in a busy folder. (note 17). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. Prefer the simplest setting that meets the requirement; extra knobs often invite accidental quality loss. (note 18). When you use resizing and cropping video on ToolComb, stay in a short loop: load media locally, change only the settings that matter, follow the local browser processing status log, preview the output, and download once you are happy. That habit replaces installing a full editor for a single chore and keeps confidential footage off anonymous cloud converters. ## How to resize or crop a video online Set scale, crop, or both, then re-encode to MP4. 1. **Upload a video** Choose MP4, WebM, or MOV up to about 100 MB. 2. **Set scale and/or crop** Enter width/height and optional crop w/h/x/y. 3. **Press Resize / Crop** Create a resized or cropped MP4 from the settings you entered. 4. **Preview** Confirm framing. 5. **Download** MP4 downloads automatically. ## Example: vertical social cutout ### Before A landscape talk must become 9:16 without a cloud cropper storing drafts. ### After They scale and crop to 1080x1920 centered on the speaker and export MP4. A light compress pass keeps the story under mobile data budgets. ## Ten reasons to resize or crop locally ### 1. Platform rules Meet exact dimensions. ### 2. Vertical cutouts Make 9:16 from landscape. ### 3. Remove chrome Crop taskbars from captures. ### 4. Subject focus Exclude empty sides. ### 5. Downscale 4K Create 1080p working copies. ### 6. Thumbnail prep Match later still extracts. ### 7. Privacy framing Cut people or boards out. ### 8. Player embeds Fit fixed web players. ### 9. Bandwidth Smaller frames compress better. ### 10. Series consistency Force one output size. ## Resize tools compared Editors, cloud sites, and this page change frames differently. | Consideration | This tool | Desktop editor | Cloud crop site | | --- | --- | --- | --- | | Upload | None | None | Yes | | Numeric crop | Yes | Yes | Sometimes | | Marquee UI | No | Yes | Often | | Best for | Precise private exports | Creative timelines | Casual social | Use an editor for motion keyframes. Use this page for known numbers and private MP4s. ## Limitations to keep in mind - No drag marquee. - Re-encodes video. - Odd sizes may need a nudge. - Each upload can be about 100 MB because the job runs in browser memory. - The first run downloads and compiles the local browser processing engine, so it is slower than later runs. - Unusual codecs may not be readable by the browser build of local browser processing. - Very long or very high-resolution clips can be slow or fail on devices with limited RAM, especially phones. - If you close or reload the tab while processing, the job stops and must be restarted. ## Privacy and good practice Your files are read by the Video Resize and Crop page and written into a temporary in-memory file system used by local browser processing. Processing happens on your device. Media is not uploaded to an encoding server. The only network fetches are the page itself and, on first use, the generic local browser processing engine files of roughly 25 MB. Those files do not contain your video. Closing the tab discards temporary data. Downloaded results land in your normal downloads folder. On a shared computer, delete them when finished and empty the recycle bin if the material is sensitive. ## Frequently Asked Questions ### Can I scale without cropping? Yes. Enter width and/or height and leave crop empty. One dimension can stay blank for auto aspect. ### Can I crop without scaling? Yes. Leave scale blank and set crop width, height, x, and y. ### What is the crop format? Width, height, x, and y in pixels after any scale. X/Y are the top-left of the keep rectangle. ### Will quality drop? Re-encoding with H.264 is not lossless. Fine for web and chat; keep masters for archives. ### How do I make vertical video? Crop or scale toward a 9:16 size such as 1080x1920 when the source allows. ### Are files uploaded? No. The resize and crop run in your browser. ### Order of operations? When both settings are used, the tool scales first and then applies the crop. ### Odd dimensions? H.264 prefers even sizes; nudge by one pixel if a crop fails. ### Audio handling? AAC when audio exists; video-only fallback otherwise. ### File size limit? About 100 MB per upload. ## Related video tools - [Video trimmer](https://www.toolcomb.com/video-trimmer) - Cut by start/end time. - [Video compressor](https://www.toolcomb.com/video-compressor) - Shrink with CRF or bitrate. - [Video to GIF](https://www.toolcomb.com/video-to-gif) - Export an animated GIF. - [Video to MP3](https://www.toolcomb.com/video-to-mp3) - Extract soundtrack as MP3. ## Related Tools Discover more free tools that might help with your next task. [Add Music to Photo Still photo + soundtrack → MP4 video Use Tool](https://www.toolcomb.com/music-to-photo) [Remove Audio from Video Mute a video / strip the soundtrack Use Tool](https://www.toolcomb.com/remove-audio-from-video) [Add Music to Video Replace a video soundtrack with your music Use Tool](https://www.toolcomb.com/add-music-to-video) [Audio Trimmer Cut MP3/WAV clips by start and end time in the browser Use Tool](https://www.toolcomb.com/audio-trimmer) [Audio Joiner Merge multiple audio files into one track Use Tool](https://www.toolcomb.com/audio-joiner) [Audio Converter Convert between MP3, WAV, OGG, and M4A locally Use Tool](https://www.toolcomb.com/audio-converter) ### Related guides Read the how-to, then come back to this tool when you are ready to run it locally. - [How to Trim and Compress Video Without Uploading Cut screen recordings and shrink MP4 for Slack, LMS, and email caps using FFmpeg.wasm locally. CRF vs bitrate, ~100 MB limits, and resize when needed.](https://www.toolcomb.com/blog/how-to-trim-and-compress-video-without-uploading) [View All Tools](https://www.toolcomb.com/tools)