Image Resizer Online

An image resizer is a tool that changes an image's dimensions or adjusts its file size to meet specific requirements. You might need a smaller image for a website, a particular width and height for a project, or a file that fits an upload limit.

Image dimensions and file size are related, but they are not the same. Dimensions describe the width and height of an image in pixels, while file size describes how much storage space the image occupies. Changing the dimensions can reduce file size, and adjusting the output format or compression quality can also affect how large the resulting file is.

Rumeq's online image resizer provides two ways to work with images. You can aim for a target file size, such as 100 KB or 200 KB, or set custom dimensions when you need a specific resolution. You can also choose an output format and compare the resized result with the original image before downloading it.

Follow these steps to resize one image or process several images together.

1. Add your images. Drag and drop files into the upload area, browse your device, or paste an image using Ctrl+V. You can also try the sample photo.
2. Choose a resizing mode. Select File Size to set a target in KB or Dimensions to enter a specific width and height.
3. Set your preferences. Choose the target size or dimensions, select an output format, and adjust the available quality and resizing options.
4. Start resizing. Click the Resize Image button, or Resize Images when processing multiple files.
5. Compare the result. Use the comparison control to view the original and resized versions side by side with an adjustable divider.
6. Download your images. Save individual results, download them separately, or download multiple processed images together as a ZIP file.

The result depends on the original image, selected format, dimensions, and target size. If a very small file size cannot be reached, try a higher target or a different output format.

Sometimes, an image needs to fit a maximum upload size rather than a particular resolution. For example, a website may accept images up to 200 KB, or an online form may require a photo below a specified file-size limit.

Choose the File Size mode and enter your desired target in KB. You can select a preset or enter a custom value between 10 KB and 10,240 KB. The tool adjusts image quality and, when enabled, can reduce the resolution to help reach the requested size.

Common target sizes include:

• 50 KB: For situations that require a very small image file.
• 100 KB: For lightweight images used in forms or online uploads.
• 200 KB: For general upload and website requirements.
• 300 KB or 500 KB: When a little more image detail may be useful.
• 1 MB: When the upload limit allows a larger image.

These values are target sizes, not guarantees. Some images cannot reach a particular target without substantial changes to quality or resolution. PNG images can be especially difficult to shrink using quality adjustments alone because PNG compression does not use the same quality setting as JPEG or WebP.

Choose Dimensions mode when you need an image to fit a specific pixel size. Enter the desired width and height, such as 1280 × 720 pixels, and resize the image to those dimensions.

The Keep ratio option helps preserve the original proportions when you change a dimension. You can also swap the width and height values when you need to change the orientation of your target dimensions.

This mode is useful for preparing images for websites, blog posts, presentations, online listings, and other projects that require consistent image dimensions.

The Never upscale small images option helps prevent a smaller source image from being enlarged unnecessarily. When enabled, the tool reduces dimensions as needed but avoids increasing the image beyond its original size.

The output format can affect image quality, transparency, compatibility, and file size. This tool provides four choices:

• Keep: Retains the original format when possible. When resizing requires re-encoding, the tool's browser-based processing may use JPEG for formats it cannot encode directly.
• JPG: A common choice for photographs and everyday images. JPEG uses lossy compression, so reducing the file size may affect fine details.
• WebP: A modern image format that can provide smaller files at useful visual quality, depending on the image.
• PNG: Suitable for graphics where lossless image representation or transparency is important. PNG files may not shrink as much as JPEG or WebP files when the target size is very small.

Choose the format based on how the image will be used. For photographs, JPEG or WebP may be suitable when smaller files are the priority. PNG can be preferable when the image's transparency or graphic details matter.

The Quality setting controls the starting quality used by the resizing process. Higher values generally preserve more visual detail, while lower values can produce smaller files in formats that support lossy quality adjustment.

When using File Size mode, the selected target guides the compression process. The starting quality setting does not guarantee a particular output size by itself.

The Reduce resolution to hit KB target option allows the tool to shrink image dimensions when quality adjustments alone are not enough. This can help produce smaller files, but reducing resolution also removes pixel detail. If the original image is already small, or the target is unusually restrictive, a suitable result may not be possible without a noticeable quality trade-off.

For dimension-based resizing, use the width and height controls to set the intended output size directly. Review the result before downloading, especially when the image contains small text, fine lines, or details that need to remain clear.

Resizing files individually can take time when you have a group of photos or graphics to prepare. This tool lets you add and process up to 40 images in one session, with each image limited to 50 MB.

After adding your files, select the desired size or dimensions and start processing. The image list displays each file's status and provides options to compare, download, or remove individual results.

When processing is complete, review the combined file-size summary to see the original total size, the resulting total size, and the overall percentage saved. You can download individual images separately or collect multiple processed images into a ZIP archive.

Batch processing is useful for preparing a collection of product photos, blog images, website assets, or personal pictures with consistent settings.

It can, depending on the changes you make. Reducing pixel dimensions removes image detail, while lossy formats such as JPEG and WebP can discard information during compression. The effect may be barely noticeable for a modest reduction or more visible when the target is very small.

To balance file size and appearance, start with a reasonable target, keep sufficient dimensions for your intended use, and compare the resized image with the original. If the result looks too soft or loses important details, try a larger target size or a different format.

Increasing an image's dimensions does not restore detail that was absent from the original. For this reason, resizing a small image to a much larger size may not improve its appearance.

The image resizing and compression operations in this tool are performed in your browser using browser image-processing features. The selected images are handled on your device for the resizing operation rather than being uploaded to a server for processing.

The tool also provides a Strip EXIF & GPS data option, enabled by default. When applicable to the output produced by the browser, removing metadata can help avoid sharing information such as embedded location coordinates or camera details.

As with any browser-based tool, avoid assuming that every file format preserves all its original properties after conversion. Check the downloaded result if you need to retain transparency, animation, metadata, or other format-specific information.