Free Online Image Resizer
Resize photos without losing quality. Works in your browser. No login, no install, no watermarks.
Original
Resized
Supported formats & compression method
Input formats
This tool resizes images entirely in your browser. No image is uploaded to a server. The output format matches the original file type. If you choose a target file size, the tool iteratively adjusts JPEG/WebP quality to get as close as possible without changing dimensions.
How resizing works
When you resize by pixels or percentage, the image is drawn to an offscreen canvas at the new dimensions using high-quality bilinear interpolation. The file is then encoded at maximum quality for that format. The “before/after” numbers shown on this page are measured from the actual original file and the actual resized output, not estimated.
Frequently asked questions
Can I resize a photo without losing quality?
Reducing image dimensions inherently removes pixel data. This tool uses high-quality resampling so detail is preserved as much as possible. Enlarging an image beyond its original pixel count cannot create new detail; it can only interpolate it. For downscaling, the result is typically indistinguishable from the original on screen.
Does this work on my phone?
Yes. The interface is fully responsive. Open the page in any mobile browser, tap the upload area, and the same controls appear. The download button saves the resized image directly to your device.
Do I need an account?
No. There is no login, no signup, no cloud storage, and no history. Close the tab and everything is gone.
What is the difference between resizing and compressing?
Resizing changes the number of pixels. Compressing reduces file size without changing dimensions. This tool can do both: choose pixels or percentage to resize, or choose a target file size to compress while keeping the chosen dimensions. For the target-file-size mode, the tool adjusts encoder quality until the output is at or just under your target.
Which is better, resizing to a target file size or a target percentage?
Use a target file size when a platform has a hard upload limit (for example, a job application that caps images at 200KB). Use a percentage or pixel dimensions when you need exact layout control (for example, a 1920×1080 hero image). Target-file-size mode gives you predictable delivery; percentage mode gives you predictable geometry.