Guides
Plain-language explanations of image formats, sizes and video compression, with practical settings you can use right away.
WebP vs AVIF vs JPEG vs PNG: which image format should you use?
File size, quality, transparency and compatibility compared – with a simple rule for picking the right format every time.
How to compress a video without losing (visible) quality
Bitrate, resolution, frame rate and codecs explained in plain language, with settings that work for phones, email, Discord and websites.
The best image sizes for websites and online stores
Practical dimensions and file-size budgets for every common image on a website, and a fast workflow to get there.
How to make product photos with a white background
Simple shooting tips and a free, private way to replace any background with pure white – no studio needed.
How to crop photos online without losing quality
Aspect ratios, the right order of crop and resize, and how to crop a whole folder to the same shape – all privately in your browser.
How to reduce JPEG file size without making the photo look worse
Resolution, quality, encoder and metadata explained – plus how to hit an exact limit such as 100 KB or 1 MB for upload forms.
How to send a video without losing quality
Why messaging apps make your videos blurry, and the best way to share a clip by chat, email, Discord or a link – depending on its size.
How to remux MKV to MP4 – and when you have to re-encode
Container versus codec explained: why MKV to MP4 usually takes seconds and loses nothing, and why AVI, WMV, FLV and MPG need re-encoding.
How to extract audio from a video (and save it as MP3)
Bitrates, trimming and large recordings explained – turn lectures, interviews and performances into small MP3 files on your own device.