Convert PNG Screenshots to WebP Before Publishing a Tutorial Blog Post

Tutorial screenshots are usually saved as PNG, and PNG files are much larger than they need to be for the web. A single annotated screenshot can be several hundred kilobytes, and a tutorial with twenty of them can add megabytes to every page load — before a reader has read a single step.

1. Keep the PNG masters
   Do not overwrite your originals. Convert copies for publishing and keep the PNG masters, in case you later need to re-crop an annotation or export at a different size.

2. Convert copies to WebP for the post
   If you need smaller files quickly, you can convert PNG screenshots to WebP for blog posts entirely in the browser: the conversion happens on your own device, nothing is uploaded, and no account is needed. WebP keeps the sharp text and flat colours that screenshots need, at a fraction of the PNG file size.

3. Check the published result, not just the file size
   After converting, open each WebP in a browser tab and compare it with the PNG: text should stay readable, thin lines should not smear, and transparent areas should behave as expected. Then check the published page on a slow connection — the gain is real only if the images still look right.

4. A simple publishing order
   Export PNG masters, convert WebP copies, spot-check text clarity, publish the WebP versions, and keep the PNGs archived. That order saves bandwidth without sacrificing the one thing a tutorial screenshot must do: stay legible.

Disclosure: I'm the developer of FileOnTap. The "keep the master, convert a copy, check the result" order is the real takeaway whichever tool you use.