Resize an image without uploading it. Image Resizer changes an image's dimensions — in pixels or as a percentage — and can crop it first, entirely inside your browser tab in Sensitive mode. That matters when the picture is a passport scan, a payslip, an ID photo for a visa application or a screenshot with account details in it: the usual free online resizers require you to hand the file to a server before you find out what they do with it. Here you can watch your browser's Network tab while you work and see that nothing leaves the machine.
How to use Image Resizer
- Choose your privacy mode. Sensitive keeps the image on this device; Ordinary uploads it to our server for large files or slow machines.
- Select a single image — JPEG, PNG or WebP.
- Optionally drag the crop box to frame the part you want. Corners resize it, dragging inside moves it, arrow keys nudge it, and the ratio locks to whatever width and height you have typed.
- Enter target dimensions in pixels or as a percentage of the original. Dimensions apply to the cropped region, not the original frame.
- Pick a fit mode: Contain fits the whole image inside your dimensions, Cover fills them exactly and crops the overflow, Exact stretches to the precise size and may distort.
- Optionally convert the output to JPEG, PNG or WebP, then choose a quality or a target file size.
- Click Process and download. In Sensitive mode the resized image never existed anywhere but your browser.
Worked example
Cropping and resizing a passport photo without sending it anywhere
A visa portal wants a 413×531 pixel head-and-shoulders photo under 240 KB, and what you have is a 12 megapixel phone snap containing your whole upper body and the kitchen behind you. Crop first: drag the box around head and shoulders, which also fixes the framing the portal will reject. Type 413 and 531, and because the ratio lock follows those numbers the crop box holds 413:531 while you drag it. Choose Cover so the output is exactly 413×531 with no letterboxing, set a target size of 240 KB, and the tool binary-searches quality until it lands under the budget — reporting the quality it settled on rather than silently degrading the image. The photo is an identity document, so run it in Sensitive mode: the crop, the resize and the re-encode all happen in the browser tab and the file is never uploaded.
Processing limits & specifications
| Mode | Location | Max file size | Retention |
|---|---|---|---|
| Sensitive mode | Your device (WASM) | Up to 75 MB (typical device) | Never stored / zero egress |
| Normal mode | Server sandbox | 200 MB | Deleted when you close the page |
Frequently asked questions
Can I resize an image without uploading it anywhere?
Yes. In Sensitive mode the resize runs inside your browser tab using WebAssembly, so the image is never transmitted. Open your browser's Network tab, process the file, and you will see no request carrying it. That is the difference between a site claiming privacy and one you can check.
Can I crop and resize in the same step?
Yes. Drag the crop box, then enter dimensions — the dimensions apply to the cropped region rather than the original frame, so a crop with no explicit size is not silently blown back up to the original resolution.
What's the difference between Contain, Cover and Exact?
Contain fits the whole image inside your dimensions without cropping, which can leave empty space if the proportions differ. Cover fills the dimensions exactly and crops the overflow. Exact stretches to precisely your numbers and can distort — useful for flexible graphics, rarely right for photographs.
Can I resize by percentage instead of pixels?
Yes. Switch the unit to percent and enter 50 to halve both dimensions or 200 to double them, relative to the cropped region if you cropped.
If I only enter a width, what happens to the height?
With Contain fit and one dimension given, the other is computed to preserve the aspect ratio.
Can I hit an exact file size?
Yes. Give a target size and the tool measures real encoded bytes rather than estimating: it searches quality first, then reduces resolution if quality alone cannot reach the budget, and tells you what it chose.
Is it free, and is there a watermark or signup?
Free, no account, no email, no watermark, and no limit on how many images you convert.
Does resizing also compress the file?
Fewer pixels usually means a smaller file, and you can set quality or a target size here too. For compression at unchanged dimensions, use Image Compressor — which also has a crop box.
Does it work offline?
Once the page has loaded, Sensitive mode needs no network. The device origin's Content-Security-Policy sets connect-src 'none', so the browser itself blocks outbound requests from that page.
What happens to EXIF data such as GPS coordinates?
Metadata is stripped by default, so a photo's location and camera details do not travel with the resized copy.