The short answer
Why use Resize Image?
A smaller or correctly formatted file is easier to upload, email, and publish. The side-by-side workflow also makes it obvious when a setting has gone too far.
Resize Image focuses on setting exact pixel dimensions while keeping the aspect ratio when needed. Raster changes are calculated from decoded pixels. The browser creates a new file, so you can compare the result with the source and keep both.
The selected file stays in this browser tab and is released when you leave the page. Check fine text, hair, gradients, and hard edges at full size. Those areas reveal compression damage first.
What Resize Image does
Drop in a photo
Drop, choose, or paste a supported file into Resize Image. Setting exact pixel dimensions while keeping the aspect ratio when needed. The source stays on your device; we work on a copy.
See the pixels change
Resize Image is for setting exact pixel dimensions while keeping the aspect ratio when needed. The preview is the place to decide if the setting went too far. The original file is not overwritten.
Useful controls
Main controls: Dimensions, quality, or output format, depending on the tool. Working limit: 50 MB and 50 megapixels per image. Watch the preview at full size before you save. A current desktop browser usually has more memory than a phone.
Download a copy
Export is jpeg, png, webp, or avif where the selected browser codec is available. The download is a new file. Keep the original until you have opened the copy once.
Where Resize Image fits
These are ordinary jobs where the focused controls save time. They also show where a full editor or a manual review may still be the better choice.
Website uploads
Meet a form or CMS file-size requirement without changing the original file.
Email and chat
Make a copy that is quicker to send while keeping the picture readable.
Format cleanup
Create a predictable file type before handing the image to another app.
Start to finish
How to use Resize Image
- 01Choose, drop, or paste a supported file.
- 02Adjust the resize image controls and check the preview at full size.
- 03Download the finished copy and open it once before using it elsewhere.
What to expect from Resize Image
This table covers the parts that matter before you begin: what goes in, which controls do the work, what comes out, and where the browser draws a hard line.
| Check | What it means here |
|---|---|
| Supported input | JPEG, PNG, WebP, GIF, BMP, SVG and browser-supported AVIF images |
| Main controls | Dimensions, quality, or output format, depending on the tool |
| Output | JPEG, PNG, WebP, or AVIF where the selected browser codec is available |
| Working limit | 50 MB and 50 megapixels per image |
| Privacy | Files and entered values stay in this tab. Filenames, pixels, metadata, OCR text, QR contents, locations, and passwords are not sent to analytics. |
Before you export
- Keep a lossless PNG when transparency matters.
- Use JPEG or WebP for photographs; compare small text before settling on quality.
- Resize first if the image is much larger than its final display size.
- Keep the original until the exported copy has been checked.
Frequently asked questions
If you cannot find what you are looking for, write us a message and we will get back to you.
What should I check before saving with Resize Image?
Does my file get uploaded?
Can I use Resize Image on a phone?
Will Resize Image overwrite my original file?
Why might the Resize Image result look different in another app?
Is Resize Image free to use?
How does Resize Image work?
What can I put into Resize Image?
How do I save the result from Resize Image?
Why did Resize Image fail or look wrong?
Will Resize Image keep a copy of my work?
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