Compress Or Increase Image Online
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Compressed images
Compress or increase an image to an exact KB or MB size
ImageTool24 gives you direct control over image file size instead of hiding the result behind a single quality slider. You can compress a large photo for a government form, reduce a marketplace image for faster loading, or increase a small file when a portal refuses anything below a minimum size. Enter the number you need in KB or MB and the tool adjusts the JPEG, PNG or WebP output in your browser. There is no fixed limit and no upload step, so private documents and family photos stay on your device.
How to compress or increase an image
- Select one or more images, or drag them into the drop zone at the top of the page.
- Enter the target size in the box, for example 100, 200 or 500, and choose KB or MB from the unit menu.
- Pick an output format. Keeping the original format is usually the safest choice, while JPG is best for photos and PNG is better for graphics with sharp edges.
- Click Compress / Increase Images and wait for the progress bar to finish.
- Download each result separately, or use Download All (ZIP) when you selected several files.
Common reasons to use this tool
- Government and exam portals: many forms ask for a photo between 20 KB and 100 KB, or a signature under 50 KB.
- Email attachments: reduce a batch of phone photos so the message sends without hitting the mailbox limit.
- Websites and online stores: smaller product images load faster and use less mobile data.
- Minimum-size requirements: some systems reject files that are too small, so the increase option can raise a JPG, PNG or WebP to the required value.
Tips for a clean result
Aim a little below the stated maximum. If a form allows 200 KB, a 190 KB file leaves room for the portal's own processing. Keep the original photo until you have checked the downloaded result, and avoid converting a file repeatedly because each save can remove more detail. For photos, JPG usually produces the smallest file. For logos, screenshots and images with transparent areas, PNG or WebP may preserve edges better. Increasing a file size does not add real detail; it only changes the stored data, so use that option only when a minimum size is mandatory.
Privacy and file handling
The compression and resizing steps run with JavaScript and the browser canvas. Your images are never sent to an ImageTool24 server, and no account or email address is required. The downloaded file is created locally and remains under your control.
Frequently asked questions
Can I compress an image to exactly 100 KB?
Yes. Enter 100, select KB and run the tool. The output is adjusted toward that target, although the final size can vary slightly because of image content and format.
Does compression change the pixel dimensions?
This page focuses on file size rather than width and height. If you also need exact dimensions, use the Resize Image tool or the resize controls on the home page.
Why is my file still larger than the target?
A very detailed or noisy image may not fit an extremely small target without visible quality loss. Try a lower target, a different output format, or resize the image to fewer pixels first.
Is there a limit on the number of images?
There is no fixed count in the interface. Very large batches and very high-resolution files are limited only by your browser's memory and your device's performance.