Start with the right expectations
Lossless compression for video is rare once you re-encode. The goal is perceptual quality: keep motion smooth and text readable while cutting file size dramatically. A practical starting point is our free online video compressor — it runs entirely in your browser with FFmpeg.wasm.
Pick resolution before bitrate
Downscaling 4K to 1080p or 720p often saves more space than lowering bitrate alone. Match output to where the clip will be watched — mobile chat, email, or desktop playback.
Match the screen, not the camera
If the clip will only appear in a chat window, 720p is usually enough. Exporting 4K for a Discord thumbnail wastes bandwidth and upload quota.
Test a short segment first
Run a 10–15 second sample through the video compressor before processing the full file. Compare clarity of faces and on-screen text.
Use modern codecs when possible
H.264 MP4 is universal. WebM (VP9) can be smaller at similar quality in many clips. When you need WebM specifically, convert MP4 to WebM online after you settle on resolution.
Discord and chat uploads
Messaging apps enforce hard size caps. Use the Discord video compressor when you need an estimated size under the limit.
Trim silent or static sections
Shorter duration means smaller files. Cut intros, dead air, and unused segments before compression when your editor allows it.
Quick checklist
Export a short test segment first, compare file size and visual quality, then process the full video with the browser video compressor. Keep originals until you verify the result.