A small set of browser based tools for everyday image tasks. Compress an image, resize it, convert between formats, or prepare a passport style photo. All processing runs locally, so your files never leave your device.
Reduce the file size of an image by re encoding it as a JPEG at a lower quality. Useful before sending photos by email or uploading them to a website.
Open the dedicated compression pageNo file selected.
Change the pixel dimensions of an image. Enter a new width, a new height, or both. If only one dimension is provided, the other is calculated to preserve the original aspect ratio.
Open the dedicated resize pageChange an image from one format to another. Convert a PNG to JPEG, a JPEG to PNG, or either format to WEBP.
Open the dedicated conversion pagePrepare an image at standard passport photo dimensions. The default size is 413 by 531 pixels, which corresponds to a common passport format. Adjust the width and height if a different size is required.
Open the dedicated passport photo pageDefault size: 413 by 531 pixels. This corresponds to a common two inch by two inch passport format. Different authorities may require slightly different sizes, so confirm the requirement before printing.
The image tools on this page cover four common tasks: compressing an image to reduce its file size, resizing it to specific pixel dimensions, converting it between formats, and preparing a passport style photo. Each tool runs in your browser and does not upload your files to a server.
Because everything happens locally, the tools work as well on a slow connection as on a fast one once the page has loaded. There is no waiting for uploads, and no copy of your image is stored anywhere. This is useful when working with personal photos that you would prefer to keep on your own device.
The tools are intended for everyday tasks rather than professional image editing. For advanced work such as colour correction, retouching, layer based editing or batch processing hundreds of images, a dedicated desktop application is usually the better choice.
The compression tool re encodes the selected image as a JPEG at a lower quality setting. This is a lossy process, so a small amount of detail is discarded, but the file size is usually reduced substantially. For photographs, the difference is often difficult to notice at normal viewing sizes.
The resize tool draws the image onto a canvas of the requested dimensions and saves the result. If only one dimension is entered, the other is calculated to keep the original aspect ratio. When both dimensions are entered, the image is drawn to exactly those values, which may distort the image if the ratio is different.
The conversion tool reads the selected image and re saves it in the chosen output format. PNG is suitable for images with sharp edges and text, since it preserves detail without compression artefacts. JPEG is usually smaller for photographs. WEBP is a modern format that often provides good quality at a smaller size than JPEG or PNG.
The passport tool draws the selected image at a fixed width and height, producing an image sized to a common passport photo format. The default values of 413 by 531 pixels match a two inch by two inch photo at standard print resolution.
Image compression reduces file size by storing the image with less data. There are two broad categories.
JPEG is a lossy format, which is why the compression tool produces much smaller files than the original in most cases. The trade off is that a very low quality setting can introduce visible artefacts around sharp edges and in areas of fine detail.
For a photograph that will be viewed on a screen, a JPEG quality of around 70 to 80 percent usually provides a good balance between file size and visual quality. For images that will be printed, a higher quality setting is preferable.
Resizing changes the number of pixels in an image. When the new size is larger than the original, the tool has to estimate the additional pixels, which is known as upscaling. When the new size is smaller, the tool has to combine existing pixels, which is known as downscaling.
Downscaling usually produces good results. Upscaling cannot add detail that was not in the original, so very large enlargements can look soft or blocky. If an image needs to be printed at a large size, it is better to start with a higher resolution original than to upscale a small one.
The tool preserves the aspect ratio when only one dimension is entered. This is usually what you want, because it prevents the image from being stretched or squashed.
Each image format has strengths and weaknesses. Choosing the right format depends on how the image will be used.
Converting from PNG to JPEG is straightforward but discards transparency, since JPEG does not support transparent areas. Converting from JPEG to PNG increases file size because PNG is lossless, but it can be useful when the image will be edited further.
For repeated work on many files, using a dedicated desktop tool is often faster than working through a browser. The tools here are best suited to occasional, one at a time tasks.
If a document contains protected content or unusual features, open it in a trusted image viewer and inspect the result after processing.
These image tools are provided for general informational and personal use. They process files using the resources available in your browser and do not provide legal, financial or professional advice.
Always keep an original copy of any important image before processing it. Compression and conversion rewrite the file, and while the visual result is usually very close to the original, some detail may be lost in a way that cannot be reversed.
Different authorities and institutions set their own requirements for passport photos. Confirm the exact size, background and lighting requirements before printing or submitting a photo.
Other free browser based utilities for common tasks.
