Trim, crop, and convert a video to MP4
Upload an MP4, MOV, or WebM video, trim it, crop it to any aspect ratio, pick a quality tier, and download a universally compatible MP4. Runs entirely in your browser; nothing is uploaded anywhere.
Frequently asked questions
Is Video Crop & Convert free to use?
Yes. Trimming, cropping, and converting a video are all free, with no signup and no watermark added to the result.
What video formats can I upload, and what do I get back?
Upload .mp4, .mov, or .webm. The output is always a universally compatible MP4 (H.264) — WebM (VP9) output was tried and dropped because it crashes this ffmpeg.wasm build even on tiny test files, so the tool only ships the format that's actually reliable.
Is there a file size limit?
Up to 300MB per file. This exists because conversion happens in your browser's memory rather than on a server — a large enough source video can otherwise stall or crash the tab.
Does it upload my video to a server?
No. Trimming, cropping, and conversion all run entirely in your browser using ffmpeg.wasm — nothing is ever uploaded anywhere.
What do the quality tiers mean?
Smaller file, Balanced, or Max quality — output resolution is capped at 1920px wide regardless of tier (higher only if your source is already smaller), just to stay safely within the browser's processing limits.
Can I trim and crop in the same pass?
Yes. The same trim-and-crop timeline used by the GIF Converter's video mode lets you pick the exact segment and aspect ratio before converting, in one step.