Guides
Plain answers about file formats, CCTV recordings and converting files.
- How to get the audio from a video (MP4 to MP3)Save the sound of an MP4 or MOV video as MP3 or M4A. Which bitrate to pick, MP3 vs M4A, the built-in ways on Mac and Windows, and a free converter.
- How to open HEIC photos on Windows and convert to JPGOpen iPhone HEIC photos on Windows 10 and 11 with Microsoft's HEIF and HEVC extensions, make new photos JPG, or convert HEIC to JPG free in a browser.
- Hikvision MP4 won't play or has no soundWhy Hikvision, HiLook and EZVIZ .mp4 exports won't open, play without sound or show no picture, and how to fix each one without re-encoding.
- How to play DAV files on Mac, PC and phonePlay Dahua .dav CCTV recordings on Windows, Mac, iPhone and Android with Smart Player or VLC, or convert them to MP4 in your browser.
- How to make a photo smaller in KB for an online formWhy a phone photo is several MB, how pixels, JPG quality and format set its size in KB, typical upload limits, and how to get under one free in a browser.
- How to make a video small enough to sendWhatsApp, Discord and email size limits for videos, and three ways to fit under them - cut it, send it as a document or link, or shrink it.
- How to remove location from photos before sharingPhone photos store where they were taken. How to remove the GPS location on iPhone, Android, Windows and Mac before you share, and which apps strip it.
- What is a DAV file and how do you open it?DAV is the recording format of Dahua CCTV recorders. Here's what's inside a .dav file, why normal players can't open it, and three ways to watch it.
- What is a WebP file? How to convert it to JPG or PNGWebP is Google's image format for websites, which is why pictures save as .webp. When to keep it, and how to convert WebP to JPG or PNG free in a browser.