Compress & resize images
Compress, resize or convert images for free (JPG, PNG, WebP) – fast and without uploading, right in your browser.
Drag an image here or click
JPG, PNG, WebP — max. 20 MB
How to compress and resize images
Large image files slow down websites, break email attachment limits and fill up storage. Compressing reduces the file size without changing the pixel dimensions – ideal when the resolution should stay the same. Resizing reduces the width and height in pixels, for example to fit a photo for a web upload or a profile picture. You can combine both: resize first, then compress for the smallest file.
JPG, PNG or WebP – which format?
- JPG/JPEG: Best for photos. Strong compression and small files, but no transparency.
- PNG: Ideal for graphics, logos and screenshots with sharp edges or a transparent background. Files are larger.
- WebP: Modern format with the best balance – much smaller than JPG/PNG at comparable quality, and it supports transparency. Recommended for websites; all current browsers support it.
Tips for the best quality
- For photos, a quality of 60–75% gives the best balance of size and sharpness.
- For the web, 1920 px width is usually enough – larger sizes bring hardly any visible benefit.
- Convert photo PNGs to WebP or JPG to shrink the file dramatically.
- Processing runs entirely in your browser – your images are never uploaded.
Frequently asked questions
How much can I compress images?
The quality slider goes from 10% to 100%. For most photos, 60–70% quality gives a big size reduction with hardly any visible loss.
Which image formats are supported?
You can upload JPG, PNG and WebP images and freely convert between these three formats. WebP usually gives the best compression at good quality.
How do I resize an image?
In the ‹Resize› tab, enter the maximum width and height in pixels. The aspect ratio is kept automatically, so your image is never distorted.
Are my images uploaded to a server?
No. All image processing happens locally in your browser using the Canvas API. Your images never leave your device – ideal for confidential documents.
How large can the images be?
The maximum file size is 20 MB. For very large images, resize first and then compress for the best result.