Resize and compress a photo in one step, with a live preview of the final file size.
How to Use Image Resizer & Compressor
Upload an image. The width and height start at its original size.
Pick a unit (pixels, percent, inches, centimetres or millimetres) and type a new width or height. With the lock on, the other value follows so the picture isn't stretched.
Drag the quality slider and watch the output size update.
Click download. The file is saved as a JPG named with its new dimensions.
Resize and compress at once
Most upload limits care about two things: the pixel size and the file size. Changing the dimensions has the biggest effect on file size, and the quality slider fine-tunes it. Doing both here, with the result shown before you download, saves running a resizer and then a compressor. The size you see is the size of the file you get.
The output is always JPG, with transparent areas filled with white. For logos and graphics that need transparency, use the Image Resizer instead, which keeps PNGs as PNG.
A note on inches and centimetres
Physical units are converted at 96 pixels per inch, the standard used by screens and web browsers. That's right for on-screen layouts. For printing, printers usually want 300 pixels per inch, so a 4 × 6 inch print needs about 1200 × 1800 pixels; enter that size in pixels rather than inches.
Key Features & Practical Use Cases
Getting a photo to an exact pixel size and under a file-size limit for an online form.
Shrinking product photos to a consistent size and weight for a web shop.
Scaling a big camera image down by a percentage and compressing it for email.
Frequently Asked Questions
How do I get a photo under 100 KB?
Reduce the width first, for example to 1200 pixels, then lower the quality until the output size drops below 100 KB.
Can I resize without keeping the proportions?
Yes. Click the lock to unlock it, then set width and height separately. The image will stretch to fit.
Why is my PNG now a JPG?
This tool always saves JPG because that's what makes files small. Use the Image Resizer to keep the original format.
Is my image uploaded?
No. Resizing and compression happen in your browser.
About OneClickly
OneClickly is a set of 119 free tools for PDFs, images, text, everyday math and code. They run in your browser, so the files and text you work with stay on your device.
Related Tools
Image Compressor - Compress JPEG, PNG, or WebP images to reduce size without losing quality.
Image Resizer - Resize images to custom width and height dimensions.
Image Color Picker - Click anywhere on an image to get that colour as HEX, RGB and HSL.
PNG to JPG Converter - Convert PNG images to JPG, with transparent areas filled in white.
Image Cropper - Crop an image by dragging a box over the part you want to keep.
Image Rotator - Rotate images by 90, 180 or 270 degrees and save them in the same format.