Image optimisation guide

When to Convert PNG Images to WebP for a Faster Website

PNG is useful, especially for screenshots, logos, and graphics needing transparency. It can also be unnecessarily large for web use. WebP often creates a smaller file while keeping an image looking good on a typical screen, but it is worth checking the export rather than converting blindly.

Convert an image to WebP

A simple way to do it

1. Choose a good candidateStart with a large PNG used on a webpage. Screenshots and decorative graphics are common candidates; keep the original file elsewhere.

2. Decide what mattersFor a photograph, small compression differences may be fine. For a screenshot containing tiny type, look carefully at letters, fine lines, and sharp edges.

3. Export a WebP copyUse the Image Resizer to convert the file locally. Give the result a clear name so it cannot be confused with the source PNG.

4. Compare at the displayed sizeView both versions at the size visitors will actually see. A file that looks acceptable at 400% zoom may still be more than good enough in a small card.

5. Replace and testUse the smaller file only after confirming it renders properly on the website. Keep the original asset as your editable master.

Common mistakes to avoid

Deleting the original PNG immediately after conversion.
Using a very low-quality export for screenshots containing small text.
Converting an image without checking whether transparency is still required.
Assuming a smaller file always looks better to a visitor.

Take a final moment to inspect the exact file, image, or text you will share. That small check is often more valuable than another round of automated cleanup.

Questions people ask

Will WebP always be smaller than PNG?

Often, but not always by enough to justify a change. Compare the resulting file size and the visible quality.

Can WebP use transparency?

Yes, WebP can support transparency, but always check the exported image against the background where it will be used.

Use the tool when you are ready

PDFTechnician is designed for everyday browser-based tasks. Your files are processed in the browser for the tool workflow, so you can prepare the result before deciding how to share it.

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