Trim and Crop Videos Online, Then Export MP4
Summary：Keep a selected video segment, remove black borders, or crop a recording to one area. Trim and crop locally in your browser and download an MP4.
Need a short highlight from a long recording, or only one part of a screen capture? Video Clip offers two focused controls:
- Time Trim: keep a selected time range.
- Screen Cropping: keep a selected area of the video frame.
Use either control on its own or both together. Processing happens in your browser without uploading the video.
Trim a video to a selected segment
- Open Video Clip and select a video.
- Enable Time Trim to display the timeline.
- Drag on the timeline to choose the start and end. The selected values appear under Trim Time.
Crop the video frame
- Enable Screen Cropping to display a crop selection over the video.
- Move and resize the selection around the area to keep.
- Click Start.
The tool maps the selection from the displayed player to the video's original pixel coordinates, then applies FFmpeg's crop filter. The selected area therefore corresponds to the source video, regardless of the player's display size.
Common uses
- Remove black borders around footage.
- Keep one application window from a screen recording.
- Extract highlights from a meeting, lesson, or event.
- Prepare for compression by shortening and cropping before using Video Compression.
Output details
- Output is MP4.
- The filename includes the export date and original name to help distinguish results.
- Leaving both controls disabled re-encodes the video as MP4 without trimming or cropping.
Frequently asked questions
Can the selected start or end differ slightly from the output?
The workflow seeks to the start before reading the selected footage. Timestamp and codec behavior can affect boundaries, so preview the selection and check the exported result when timing matters.
Can I export several segments at once?
The current tool exports one segment at a time. Repeat the process for additional segments.
Can I use it on a phone?
The timeline and crop selection are designed around mouse dragging, so a desktop browser is preferable.
Can I export another format?
The editing tool exports MP4. Use Video Format Converter afterward if another format is required.
Related tools
Questions
Compress JPG and PNG Images Online Without Uploading Files
Reduce JPG and PNG file sizes in your browser. Learn how quality settings, output formats, and compression ratios affect your images.
Convert PNG to JPG and JPG to PNG Online
Convert PNG, JPG, and BMP images in your browser without uploading files. Learn how conversion affects transparency, file size, and image quality.
Crop Images Online: Aspect Ratios, Rotation, and WebP Export
Crop photos to 1:1, 16:9, and other aspect ratios. Rotate, flip, and lock your selection, then export PNG, JPG, or WebP directly in your browser.
Resize Images, View Image Information, and Create ICO Icons Online
Resize images, adjust output quality, inspect format and color space, and convert PNG or JPG to ICO icons with browser-based Image Tools.
Convert MOV to MP4, MKV to MP4, and MP4 to WebM Online
Convert videos between MP4, MKV, AVI, MOV, FLV, WebM, and M4V in your browser. Compare formats and learn what changes during conversion.
Trim and Crop Videos Online, Then Export MP4
Keep a selected video segment, remove black borders, or crop a recording to one area. Trim and crop locally in your browser and download an MP4.
Extract Audio from Video Online: Convert MP4 to MP3
Extract sound from MP4, MOV, or MKV videos and export MP3, WAV, FLAC, or M4A. Process recordings locally in your browser without uploading files.
Convert WAV, FLAC, and M4A to MP3 Online
Convert audio between MP3, WAV, FLAC, M4A, OGG, WMA, and AC3 in your browser. Compare formats and understand the tradeoffs in file size and quality.
Trim Audio Online: Cut MP3 Clips with a Waveform Preview
Select a time range on an audio waveform, listen to the preview, and export MP3. Make short clips or remove unwanted sections from recordings locally.
Generate and Read QR Codes Online from Text, Links, and Images
Create a downloadable QR code from text or a URL, or decode a QR image in your browser. Learn how to make codes easier to scan and inspect their links.
AES Encryption and Decryption Online: CBC, ECB, Keys, and IVs
Use AES-128, AES-192, or AES-256 with CBC or ECB in your browser. Check UTF-8 key lengths, IV requirements, and hex or Base64 ciphertext encoding.
Base64 and URL Encoding Online: Differences and Common Uses
Encode and decode UTF-8 text with Base64 or URL percent-encoding in your browser. Learn which to use and how to troubleshoot malformed URL escapes.
Random String Generator: Alphanumeric Test Data and Temporary IDs
Generate 1–10,000 alphanumeric characters with a letter first. Create test data and temporary identifiers, and learn why this tool is unsuitable for secrets.
Free Online Tools for Images, Video, Audio, and Encoding
Explore Xian's Tools for compression, conversion, trimming, QR codes, AES, and hashing. Learn how files are processed locally in your browser without uploads.
Compress Videos Online: MP4 Compression, Bitrate, and File Size
Compress MP4, MOV, and MKV videos locally in your browser. Learn how the quality slider changes bitrate and how to interpret the estimated output size.
Compress Audio Online: Reduce MP3 Bitrate and Recording File Size
Reduce audio file sizes locally in your browser. Learn how bitrate affects size and how to choose compression settings for speech, podcasts, and music.
Calculate MD5, SHA, and HMAC Online: Uses and Differences
Calculate MD5, SHA1, SHA256, SHA512, and HMAC for text in your browser. Understand digest lengths, API signatures, and why hashing is not encryption.
