Image Resizer
Shrink PNG, JPEG, and WebP images to fit any pixel bounds locally.
Browser onlyYour data never leaves this device.
Runs entirely in your browser. Your images never leave this device and are never stored.
Details: Privacy policy
Input
Drop files here or Browse
Drag and drop works here too.PNG, JPEG, or WebP up to 10 MB. Drag and drop or browse.
Result
No image yet.
Choose an image above to resize it locally.
Image Resizer scales down PNG, JPEG, and WebP images to fit within custom maximum width and height bounds while strictly maintaining the original aspect ratio. Unlike Image Cropper, which cuts away outer edges and alters visual composition to fit an area, Image Resizer keeps the entirety of your visual frame intact, reducing pixel density to satisfy strict upload limits for content management systems, profile portals, and email attachments. A core architectural principle prevents upscaling: if your uploaded image already fits within the specified pixel bounds, the engine never interpolates or stretches blurry synthetic pixels, preserving original resolution and flagging the output with Scale: No. Automatic EXIF parsing reads orientation flags (1 through 8) on JPEG photos, ensuring smartphone snapshots render upright before geometry calculations begin. The tool enforces robust boundaries, accepting single files up to ten megabytes, dimension bounds between one and 8000 pixels, and total areas under forty megapixels. All decoding, coordinate calculation, and canvas re-encoding run entirely within your browser, ensuring private family photos and confidential company graphics remain on your device.
Key facts
- Input
- PNG, JPEG, WebP
- Output
- PNG, JPEG or WebP at new pixel bounds
- Limits
- Accepts PNG, JPEG, and WebP files up to 10 MB and 40 megapixels (maximum 8,000 px per edge). Maximum width and height parameters must be positive integers between 1 and 8,000 pixels.
- Processing
- In your browser — nothing is uploaded
- Sign-up
- Not required
- Cost
- Free
Limits above are read from the same code that enforces them; formats are the ones the tool accepts and produces.
How to use Image Resizer
- Drop a PNG, JPEG, or WebP image up to 10 MB and 40 megapixels into the drop zone.
- Enter your target maximum width and height bounds in pixels (between 1 and 8,000 px).
- Select your desired export format: keep the original format or convert to PNG, JPEG, or WebP.
- Adjust the quality slider (1–100%) if exporting to lossy formats like JPEG or WebP.
- Examine the output summary to verify final dimensions, MIME type, and whether scaling was applied.
- Download the resized image directly to your device or clear the canvas to start over.
What you get
- A PNG, JPEG or WebP whose longest side fits the pixel bounds you set, in the source format unless you choose another.
- The output dimensions, MIME type, whether scaling happened and the download filename, reported together.
- No upscaling: an image already inside the bounds passes through at its original pixels and is marked Scale: No.
When to use Image Resizer
- Fit a photo under an upload pixel limit without desktop software.
- Prepare consistent thumbnails for a listing page.
- Check whether a batch of images already fits the bounds, since the result says whether scaling happened.
Jobs you can do with Image Resizer
Frequently asked questions about Image Resizer
Does Image Resizer upload my pictures to an online server?
No. Image decoding, EXIF orientation adjustments, and canvas scaling execute locally inside your browser; no file or pixel data ever leaves your device.
What are the maximum input limits for resizing an image?
The tool accepts PNG, JPEG, and WebP files up to 10 MB in file size, 40 megapixels in total area, and a maximum boundary of 8,000 pixels on either dimension.
Why does Image Resizer refuse to enlarge smaller images?
To protect visual quality, the tool enforces a strict no-upscale rule. If an image is smaller than your target bounds, it passes through at its original native resolution.
How does Image Resizer differ from Image Cropper?
Image Cropper cuts off outer edges and changes composition, while Image Resizer keeps the full original picture intact and scales down its pixel dimensions proportionally.
What happens to rotated smartphone photos when resized?
The engine reads EXIF orientation tags (values 1 through 8) from JPEG images and automatically rotates the bitmap upright before calculating target dimensions and rendering.
Guides that compare Image Resizer
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