Prepare images for the web, email and forms — privately
Modern phone cameras produce photos that are several megabytes in size and thousands of pixels wide. That is great for printing, but it slows websites down, bounces off email attachment limits, and gets rejected by upload forms. The image tools on this page solve those problems without sending your pictures anywhere: both tools use your browser's built-in image features to decode, resize and re-encode images on your own device.
Resize or compress? Usually both
Image size has two separate parts, and it helps to think about them separately:
- Dimensions — how many pixels wide and tall the image is. Change these with the Image Resizer.
- File size — how many kilobytes or megabytes the file takes up. Reduce this with the Image Compressor.
Reducing dimensions reduces the number of pixels that need to be stored, which usually cuts file size dramatically. Compression then stores those pixels more efficiently. For the smallest good-looking result, resize to the size the image will actually be displayed, then compress. Our guide on how to compress images without losing too much quality walks through this workflow step by step.
Choosing a format
| Format | Best for | Transparency | Compression |
|---|---|---|---|
| JPEG | Photographs | No | Lossy, adjustable quality |
| PNG | Screenshots, logos, graphics with sharp edges | Yes | Lossless |
| WebP | Photos and graphics on websites | Yes | Lossy or lossless, usually smaller than JPEG |
Both tools can convert between these formats. When converting an image with transparency to JPEG, transparent areas are filled with white because JPEG cannot store transparency.
Why local processing matters
Many online image tools upload your file to a server, process it there, and send it back. That means your photo — which might show your home, your children, a document or your location data — is stored, at least temporarily, on someone else's computer. Our tools never do this. The image is read by your browser, processed in memory, and offered back to you as a download. As a side effect, the processed copy does not carry the hidden EXIF metadata (such as GPS coordinates) that phone photos often contain.
Limits of browser processing: very large images, above roughly 50 megapixels, can exceed the memory available to a browser tab on some phones. If that happens, resize in two steps or use a desktop browser.
Quick recommendations
- Blog or website photo: resize to 1200–1600 px wide, then compress to WebP or JPEG at quality 70–80.
- Email attachment: resize to about 1600 px wide and compress to JPEG at quality 75.
- Form with a size limit: compress and lower the quality in small steps until the file fits; reduce the width if needed.
- Screenshot with text: keep PNG or use WebP at high quality so the text stays sharp.
Frequently asked questions
Are my images uploaded?
No. Both image tools process files entirely in your browser. Nothing is sent to our server or to any third party.
Which formats are supported?
JPEG, PNG and WebP for both input and output. WebP output requires a browser that can encode WebP; almost all current browsers can.
Will the tools reduce quality?
Resizing down and lossy compression both remove some information. At sensible settings the difference is hard to see, and you can compare before and after previews before downloading.