Image Resizer & WebP Converter

Resize and convert images privately

Images often need a different size or file format before they are uploaded to a website, sent in a message, added to a document, or used in a social post. This free image resizer and WebP converter uses the HTML5 Canvas API in your browser. Choose a file or drag it into the drop zone, set the dimensions, select WebP, JPEG, or PNG, and download the result. The original file is not uploaded to AfriWidget and the processing does not require an account.

The preview starts with the image’s natural width and height. Change the width or height to set a new output size. With aspect-ratio lock enabled, changing the width automatically calculates a proportional height. This helps prevent stretched faces, distorted logos, and squashed product photos. Turn the lock off when you specifically need exact dimensions, such as a banner slot or a fixed thumbnail frame.

Choosing WebP, JPEG, or PNG

WebP is often a strong default for websites because it can provide a smaller file than a comparable JPEG or PNG while retaining good visual quality. JPEG works well for photographs and natural scenes with many colours. PNG is useful when you need lossless output or transparency, although the resulting file may be larger. Browser support is broad, but always test the downloaded file in the application where it will be used.

The quality slider affects lossy formats such as WebP and JPEG. A high setting preserves more detail but can produce a larger file. A lower setting can make a useful small image for a website, email, or preview. PNG encoding is lossless, so changing the quality slider may not change its file size in the same way. The best setting depends on the image, its viewing size, and whether sharp text or fine detail matters.

Dimensions and image quality

Reducing dimensions usually reduces file size and makes a page load faster. Do not enlarge a small image expecting it to gain detail; the canvas can create a larger file, but it cannot restore information that was never captured. For a website hero image, use the display size and device requirements as a guide. For a profile image, a square crop may be more important than maximum resolution. This tool resizes the entire image rather than cropping it.

Canvas output can flatten some image characteristics, including certain metadata and advanced colour profiles. If you need camera metadata, layered editing, animation, or professional colour management, use a specialised application. Animated formats may only represent the currently decoded image frame, depending on browser behaviour.

A simple image workflow

Start with the original file whenever possible, then decide where the output will be used. A blog image may need a maximum width for responsive loading, while a messaging profile may need a square image. Keep the ratio locked while reducing a photograph, check the output dimensions shown beneath the preview, and choose a format based on transparency and compatibility. Download a test file and open it before replacing the original or uploading it to a production system.

For large photos, try a smaller width before lowering quality aggressively. For screenshots with text, PNG may keep edges sharper. For ordinary photos, WebP or JPEG at a moderate quality can be much smaller. Compare the result at the size visitors will actually see rather than judging only while zoomed in. If an image looks soft, return to a larger source instead of repeatedly enlarging the converted copy.

Client-side privacy

File selection and conversion happen on the device. The page creates an in-memory object URL, draws the image to a canvas, and creates a downloadable data URL. This means no server upload is required. You should still avoid using any online tool with confidential images unless your organisation permits it, and remember that downloaded output may contain visual information you intended to keep private.

Frequently asked questions