Short, practical write-ups about file formats — what they're for, when to switch, and how to get the best result. No fluff.
Watch the 90-second walkthrough — drop a file, pick a format, download. Everything runs in your browser.
40 guides
A black rectangle where the demo should be, five minutes before the meeting. Here is why PowerPoint refuses perfectly good MP4 and MOV files, which format still plays on conference-room PCs you cannot test in advance, and how to keep the deck small enough to email.
Read the guide →Every upload form wants a PDF and every piece of evidence you have is a photo. Which source file to start from, why page size should follow the image instead of forcing A4, how to merge pages in reading order, and why identity documents should never be uploaded to convert.
Read the guide →Hundreds of albums ripped in Windows Media Player that play on nothing you own. How to spot the DRM-locked tracks no tool can convert, what bitrate is genuinely enough from a lossy source, and why a music library should not be uploaded album by album.
Read the guide →Renaming a .txt does not make a Word file — a .docx is a ZIP of XML. How blank lines become paragraphs, why accented characters turn into question marks, and how to style the result so it holds up as a document rather than one endless block.
Read the guide →The folder on the external drive that no longer plays. What Flash-era FLV really contains, how a ripped DVD is split across VIDEO_TS, why deinterlacing matters, and why upscaling an old phone clip only makes the blocks bigger.
Read the guide →JPG is best for photographs with millions of colours and no transparency. PNG is for graphics, screenshots, and anything that needs a transparent background — it's lossless, so quality never degrades. WebP is Google's modern option that combines both: roughly 25–35% smaller than JPG at similar quality, with optional transparency. The only reason not to use WebP is compatibility — older design tools and some social platforms still prefer PNG or JPG.
Try WebP to PNG →