Topic
Video guides
5 practical guides about video, with the free tools that go with them.
How to Convert MKV to MP4 for Free (No Software)
MKV not playing on your phone, TV or editor? Convert MKV to a widely supported MP4 online for free, with steps, limits and tips for keeping quality.
Aspect Ratios Explained: 16:9, 9:16, 4:5 and 1:1
What aspect ratio means, which one to use for YouTube, Reels, TikTok and Instagram, how to calculate it, and how to fix a video with black bars.
Convert iPhone MOV (HEVC) Video to MP4 for Free
iPhone videos not playing on Windows, Android or a TV? Learn why MOV and HEVC are the problem and how to convert them to a universal MP4 in a minute.
Downloaded Video Has Sound but No Picture on iPhone? Fix
Why some downloaded videos play audio only on iPhone (VP9 and AV1 codecs), how to check, and how to get a video that plays everywhere.
How to Extract Audio From a Video as MP3
Pull the sound out of any MP4, MOV or WebM video and save it as an MP3. Step by step on phone and PC, with quality tips and common problems solved.