Use Resize for a target resolution or aspect ratio such as 9:16.
Video Resizer and Letterbox Tool →Tools in this category
Video Tools
Resize, compress, convert and trim video with browser-based processing.Tools in this category
01
Video Resizer and Letterbox Tool
Resize, crop and letterbox videos locally with browser-based FFmpeg.
Open tool →02Video Compressor
Compress video files locally with selectable output quality.
Open tool →03Video Format Converter
Convert videos between MP4 H.264 and WebM VP9 locally.
Open tool →04Video Trimmer
Trim a selected video time range locally in your browser.
Open tool →Which tool should I use?
Choose the result you need rather than a technical label.
Use Compress when storage or transfer size matters and inspect visual quality after encoding.
Video Compressor →Use Convert when the destination does not accept the source format.
Video Format Converter →Use Trim when you need a shorter excerpt without changing the source file.
Video Trimmer →Common tasks
For a messenger attachment, compress a short clip and check its final size. For a vertical social post, resize the frame and choose between cropping the edges and preserving the full scene with letterboxing.
Related guides
01 / GUIDE
Size for me guide: Galaxy Lock Screens, Shorts and Reels
Learn how to use Size for me for Galaxy live Lock Screens, YouTube Shorts and Instagram Reels.
Read guide →02 / GUIDEWhy video files are large—and how resolution, FPS, format and quality reduce them
Understand resolution, FPS, bitrate and quality, codecs and audio, then choose what to reduce for each video destination.
Read guide →