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JPG, PNG, WEBP • Maximum 20MB • Processed locally in your browser
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Helpful Guides
Features
Private Processing
Everything runs inside your browser. Your file is never uploaded to a server.
Multiple Units
Set dimensions in pixels, inches, centimeters or millimeters with DPI control.
Target KB Size
Compress to 20KB, 50KB or any file size limit your form requires.
Mobile Friendly
Works smoothly on phones, tablets and laptops without installing anything.
Recommended Size Guide
A JPEG needs a minimum amount of data per pixel to stay sharp. If you ask for a very small file at very large dimensions, the result will look blocky. Use this table as a safe starting point.
| Target file size | Recommended maximum dimensions |
|---|---|
| 20 KB | About 640 × 360 px |
| 50 KB | About 1000 × 560 px |
| 100 KB | About 1400 × 790 px |
| 200 KB | About 2000 × 1125 px |
Frequently Asked Questions
Are my images uploaded to a server?
No. Resizing and compression run inside your browser using the Canvas API. Your file is never uploaded and the result is saved directly to your device.
How do I resize an image in inches, centimeters or millimeters?
Open the By Size tab, enter the width and height, choose your unit and set the DPI value. The tool converts the physical size into pixel dimensions automatically.
Why does my image look blurry after compressing it to 20KB?
A 20KB JPEG can only store a limited amount of data. If the image is still 1920 × 1080 pixels, the compressor has to lower quality drastically and the result looks blocky. Reduce the dimensions to around 640 × 360 pixels and the same 20KB file will look sharp.
What does “Auto-resize to protect quality” do?
When the target file size is too small for the chosen dimensions, the tool reduces the pixel dimensions slightly instead of destroying image quality. Switch it off if you need exact dimensions and can accept a lower quality result.
Which preset should I use for a passport size photo?
The Passport 413×531 preset covers most 35 × 45 mm requirements at 300 DPI. Always check the official dimensions and file size limits of the form you are filling.
Can I compress a PNG file to an exact KB size?
PNG uses lossless compression, so exact KB targets are not reliable. For a specific file size limit, JPG or WEBP is usually the better choice.
Click a preset to load its dimensions.