WebP is the most effective single change most websites can make to page speed. It produces files noticeably smaller than JPG at comparable quality, and it is supported by every current browser. The free WebP Converter on Streams8K converts any image to WebP in your browser, with a quality setting you control.
What it actually does
You load an image, set the quality, and the converter re-encodes it as WebP. Quality is the dial that matters: push it up and you approach the original at a much larger file size, pull it down and artefacts appear as blurring and colour banding. For most web images, somewhere in the seventies is the sweet spot, which is why the tool exposes the value rather than hiding it.
How to use it
- Open the WebP Converter and load your image.
- Set the Quality value. Start around 75 and lower it for smaller files.
- Press “Convert to WebP”.
- Compare the result visually at 100% zoom.
- Download the WebP file and keep the original as a fallback for older browsers.
Where it saves the most time
Speeding up a slow page, cutting the weight of an image-heavy post before uploading it, and reducing storage and bandwidth on a gallery. For an ecommerce site with dozens of product photos, converting them all can be one of the biggest single performance wins available.
Tips for the smallest sensible file
- Always look at the result at 100% zoom. Artefacts hide until you inspect closely.
- Photographs tolerate lower quality than screenshots, which show banding around text.
- Resize before converting. A smaller image at a good quality beats a large one at low quality.
- Keep JPG fallbacks only if you genuinely need to support very old browsers.
It is also useful for preparing images for email campaigns, where attachment size limits are strict and images are often the reason a message will not send.
Related tools that pair well with this
Most people who need one of these end up needing a second tool as well. These sit in the same AI Image & Photo group and are all free to use in the browser:
- ASCII Art Maker – Turn photos into retro ASCII art.
- Background Blur – Blur or pixelate photo backgrounds.
- Background Remover – One-click photo cutout in your browser.
If the original is unusually large, converting the format first and resizing second usually gives a better result than doing it in one step.
Questions people ask
Is WebP smaller than JPG?
Usually yes, often by a considerable margin at a comparable visual quality. It also supports transparency, where JPG does not.
Does WebP work in every browser?
WebP is supported by all current major browsers. If you need to support very old browsers, keep a JPG version as well.
What quality setting should I use?
Around 75 is a sensible starting point. Drop it for smaller files and raise it if you see artefacts.
Does the converter upload my image?
No. It runs in your browser, so the file never leaves your device.