Choose aspect ratio, resolution and fit method, including manual crop selection and letterbox backgrounds.
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
Choose the result you need rather than a technical label.
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.
Re-encode video at high, balanced or small-file quality without uploading the source.
Video Compressor →Choose MP4 or WebM, frame rate and audio options, then encode with local WebAssembly FFmpeg.
Video Format Converter →Set start and end times, choose output options and download the locally encoded clip.
Video Trimmer →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 →