The blog.

Straight answers about video and audio formats, what they are, which to use, and how to convert between them.

How to Compress a Video (Free, Without Losing Much Quality)

A step-by-step guide to making a video file smaller, by target size or quality, without uploading it or adding a watermark.

A step-by-step guide to cropping a video, drag a box to keep exactly the part of the frame you want, no upload required.

A step-by-step guide to pulling the audio out of a video and saving it as an MP3, free, private, no upload.

A quick guide to removing the sound from a video while leaving the picture exactly as it was, free and private.

MP3, WAV, FLAC, AAC or Opus? A plain-spoken guide to which audio format wins for sharing, editing, archiving and streaming.

FLAC keeps every bit of the master; MP3 is smaller and plays everywhere. Here's when lossless actually matters.

H.265 halves file size at the same quality, but H.264 plays on everything. Here's how to choose the right codec.

A plain-spoken, step-by-step guide to converting MKV to MP4 for free without uploading your file or losing quality.

A plain guide to rotating a sideways video 90 or 180 degrees, why phones cause it, and how to bake the fix into the frames.

M4A sounds a bit better byte-for-byte, but MP3 plays on everything. Here's how to choose between the two audio formats.

MP3 is audio only; MP4 is a video container that also holds audio. Here's the real difference and when to convert between them.

WAV is lossless and huge; MP3 is tiny and lossy. Here's exactly when to use each, with real file sizes and a simple rule.

WebM is smaller and built for the web; MP4 plays everywhere. Here's how to pick the right one and convert between them.

A plain-English guide to codecs vs containers, lossy vs lossless, and why an MP4 or MKV sometimes refuses to play.