Resize a PNG, JPEG or WebP image by dimensions or percentage. Keep its aspect ratio, preview the result and download a new image without uploading your file.
Your image is never uploaded to any server; decoding, resizing and export happen locally in your browser. No account or image history is needed. File content and pixel limits keep the tool bounded, while the export format is checked before a download is offered.
Static PNG, JPEG and WebP files are supported. SVG, GIF, AVIF, HEIC and detected animated PNG/WebP are not supported. The tool checks file signatures and header dimensions before asking the browser to decode the image, then checks decoded dimensions too. A valid-looking header does not guarantee a file is decodable.
Input is limited to 20 MiB (20,971,520 bytes), 16,384 pixels per side and 40 megapixels. Output is limited to 8,192 pixels per side and 16 megapixels. If the original exceeds output limits, initial pixel dimensions are reduced to fit. Device memory can impose a lower practical limit; try a smaller image if decoding or export fails.
With the ratio locked, editing width recalculates height and editing height recalculates width from the original image. Pixel rounding may slightly alter the exact ratio. Percentage mode scales both original dimensions and accepts 0.01–1,000% with up to two decimal places, within output limits; very small dimensions round to at least one pixel. Unlocking dimensions can stretch the image. Upscaling does not restore missing detail.
PNG and WebP outputs keep transparency where supported. JPEG fills transparent areas with the chosen background color, white by default. The quality control affects JPEG and WebP only; it is not a promised file size or universal quality scale. Browsers choose the encoder and interpolation details. If the requested format is unsupported, the tool reports an error instead of silently downloading another format.
The browser decodes the image using its from-image orientation behavior, so the displayed dimensions reflect the decoded orientation. Canvas export creates a new raster image and does not preserve original metadata or guarantee the same color profile, precision or encoded bytes. Check important images visually. The preview is scaled to fit; downloads use the reported output dimensions.
No image history or files are uploaded or stored by the application. Processing uses in-memory image data and local object URLs, which are released when replaced, cleared or the page is left. Downloads save only when you select Download image. Export has a 15-second response limit; editing settings discards any pending result.
