Free Online Image OptimizerWalkthroughs
Every tool on the site, explained a step at a time with pictures of the real thing. Each one is written around a single job: what to drop in, what the numbers on screen mean, and what to do with what comes back.
How to turn a PDF into images
A step-by-step walkthrough, with screenshots, of turning every page of a PDF into a JPEG you can post, email or drop into a document.
How to make responsive images and the picture element
A walkthrough, with screenshots, of generating AVIF, WebP and JPEG at two widths and the <picture> markup that serves the right one to each visitor.
How to convert JPG to WebP
A walkthrough, with screenshots, of turning JPGs into WebP files a third smaller, and of the few places a WebP still causes trouble.
How to remove EXIF and other hidden data from a photo
A walkthrough, with screenshots, of stripping the location, timestamp and camera data a phone writes into every photograph — and how to check it is gone.
How to compress a whole folder of images at once
A walkthrough, with screenshots, of putting up to twenty images through the same settings in one pass and taking the results as a single zip.
How to convert PNG to WebP and keep the transparency
A walkthrough, with screenshots, of turning heavy PNGs into WebP files a fraction of the size with the transparent background intact.
How to make photos small enough to email
A walkthrough, with screenshots, of getting a handful of phone photographs under the size a mail server will accept, and the arithmetic behind the limit.
How to shrink photographed or scanned pages
A walkthrough, with screenshots, of getting photographed paperwork down to something a portal will accept while keeping the small print readable.
How to convert WebP to JPG
A walkthrough, with screenshots, of turning a WebP into a JPG that opens anywhere — and the one thing to check first if the picture has a transparent background.
How to convert WebP to PNG
A walkthrough, with screenshots, of turning a WebP into a PNG with the transparency and the soft edges intact — the conversion to pick for a logo.
How to flip or mirror a photo
A walkthrough, with screenshots, of mirroring a selfie so the lettering reads the right way round, and of the other turns available on the same page.
How to darken a photo so text can sit on it
A walkthrough, with screenshots, of dimming a photograph until a headline over it is readable, using a slider and your own eyes rather than a guess.
How to add a watermark to a photo
A walkthrough, with screenshots, of putting a name or a logo on a photograph: where to place it, how strong to make it, and what it does not protect.