Guides for short-form video.

All guides

• Instagram Reels size: The pixel size, aspect ratio, length and safe zones for Reels, covers and feed posts.
• YouTube Shorts size: The frame size, aspect ratio, 3-minute length rule and safe zones for YouTube Shorts.
• How to remove background noise from a video: Clean fan hum, traffic and room noise out of a video, free, plus how to record cleaner sound.

Quick answers

Instagram Reels size

The best Instagram Reels size is 1080 × 1920 pixels, a vertical 9:16 frame. Instagram accepts Reels from 1.91:1 (landscape) to 9:16, but anything wider than 9:16 plays with empty space around it in the Reels tab. Read the full guide.

YouTube Shorts size

The YouTube Shorts size is 1080 × 1920 pixels, a vertical 9:16 aspect ratio. YouTube treats any video with a square or vertical aspect ratio that is up to three minutes long as a Short; wider videos, such as 16:9, are treated as regular videos whatever their length. Read the full guide.

How to remove background noise from a video

To remove background noise from a video for free, open it in Cutmallow’s browser editor and turn on Remove background noise. Clean mode removes steady noise such as fans, air conditioning and hum instantly on any device; Studio mode runs the DeepFilterNet3 speech model for heavier noise like traffic or a busy room. Read the full guide.

How these guides are written

Each guide answers one question in its first paragraph, then gives the detail: exact sizes, limits, and the steps that work. Platform facts come from the platforms' own help pages, listed under Sources on every guide with the date they were last checked. Instagram, YouTube and TikTok change their rules often, so if you spot something out of date, tell us.

Do it with a free tool

Every guide ends in the Cutmallow tool that does the job, in your browser, with no upload, account or watermark. See all free tools, or open the editor to cut, clean, caption and export a Short in one place.