Frequently asked questions
Is ImageSizePro free to use?
Yes, completely. There's no paid tier, no signup, no watermark on your downloads, and no usage limit we impose. Processing happens on your own device, so there's no server cost per image that would require charging you.
Do I need to create an account to compress an image?
No. IMAGE SIZE PRO doesn't require an account, email address, or login of any kind. Open the compressor, add your image, and start using it immediately.
What file formats can I use?
JPG, PNG, and WebP work for both input and output. AVIF is also offered as an output format when your browser can encode it.
Can I process more than one image at a time?
Yes. Add as many images as you like, set your requirement once, and process the whole batch. Each image is checked against your target independently, and you can download everything together as a ZIP.
How do I compress an image to an exact file size?
Open the tool, turn on "Limit file size," and type a number or tap a preset (20KB, 50KB, 100KB, 200KB). We search for the highest quality that still fits under it and confirm with a pass/fail badge.
How do I resize an image to exact pixel dimensions?
Turn on "Resize" and type an exact width and height. See the resize page for details on fit modes.
Are my images uploaded to a server?
No. Decoding, resizing, compressing, and converting all happen locally in your browser using built-in image-processing APIs. Your image file is never transmitted over the network, so there's nothing uploaded, stored, or logged on our end. See how it works for the technical explanation.
Does this work on mobile?
Yes. The tool works in any modern mobile browser (Chrome, Safari, Firefox, Edge). You can pick a photo from your camera roll the same way you'd attach one anywhere else.
Why does my image sometimes not reach the exact size I asked for?
A very small target on a large, detailed photo can hit a floor where lowering quality any further would leave the image badly damaged. At that point the tool scales the dimensions down as well. The result always shows the final width, height, and file size. If you also set exact dimensions, or the size target still can't be met, a warning explains what was missed.