How file formats actually work
Plain explanations of the decisions behind converting a file — which format to pick, what you lose, and what happens to your data along the way.
PNG vs JPG vs WebP
A practical guide to choosing between PNG, JPG and WebP: what each format is good at, where each one falls apart, and how to decide in about ten seconds.
VideoWhy is my video file so large?
What actually determines video file size — bitrate, codec, resolution and length — and which of them you can change without wrecking the picture.
FundamentalsLossy vs lossless
What the difference between lossy and lossless really means, why converting between lossy formats compounds damage, and when it genuinely does not matter.
PrivacyAre online file converters safe?
What happens to a file you upload to a conversion site, what privacy policies really commit to, and how to spot a converter that runs locally.
AudioAudio formats explained
What separates MP3, AAC, FLAC, WAV, OGG and Opus, which to use for archiving versus listening, and why MP3 refuses to die.
DataCSV, JSON and YAML
What CSV, JSON and YAML are each good at, the traps when converting between them, and why type coercion silently corrupts spreadsheet data.