How to jpg/png to webp
- Choose your image.
- Make sure Convert to says WebP and set quality (80 is a good balance).
- Tap Convert and download.
WebP for website owners
Image weight is one of the biggest causes of slow pages, and page speed is part of how Google evaluates your site. WebP is supported by all current browsers, and keeps transparency like PNG. Upload the .webp file to your site or CMS in place of the JPG.
Is it safe to upload my photo?
Your image is never uploaded. ResizeKB processes files inside your own browser using the same technology that draws images on web pages, so the photo never leaves your phone or computer. That matters for documents like passport photos, ID scans and signatures. You can even disconnect from the internet after the page loads and the tool keeps working.
Frequently asked questions
Which quality should I use?
75–85 suits most website photos. Use 90+ for product images where detail matters.
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Last updated 2026-10-27