Resize Image Online
Resize several photos at once. Fitting by the longest side sorts out a mixed batch of portrait and landscape shots in one go, and nothing is uploaded to a server.
How to use Resize Image Online
- Choose photos to resize. You can pick several at once or drop them onto the box.
- Pick what to fit by. Longest side uses whichever side is longer, Width uses the horizontal side.
- Exact size lets you type width and height, with a lock-ratio button that fills in the other side.
- Press Resize. Every row shows the new dimensions and file size.
- Press Save on a row, or Save all (ZIP) to download everything at once.
For a mixed batch, fit by the longest side
Fitting a mixed batch to a width of 1280 leaves portrait shots over 1700 pixels tall, towering over the landscape ones. Longest side 1280 caps whichever side is longer, so every photo takes up a similar amount of screen. The aspect ratio is kept in every mode; only Exact size lets you turn the lock off and squash the picture.
Never enlarge past the original
This is on by default. In a batch it stops small pictures from being stretched into a blurry mess: they stay at their own size while the big ones come down. Turn it off if you really do want to scale up, but remember that the extra pixels are invented and the result gets soft.
The format follows the original
A JPG comes back as JPG, a PNG as PNG, a WebP as WebP, and the new dimensions are added to the name: holiday-1280x853.jpg. No more shrinking a photo only to get a bigger PNG back.
For JPG and WebP the quality is stepped down as needed so the result does not end up heavier than the original, and a photo that needs no change at all is handed back as the untouched original file, marked unchanged original on its row. To squeeze the size further, run Compress Image afterwards.
How small should you go
| Where it goes | Longest side | Why |
|---|---|---|
| Blog post image | 1280px | Wider than the column, still sharp on high-density screens |
| Preview or thumbnail | 1200px | Close to the size used on sharing cards |
| Instagram square | 1080px | Crop to a square first, then fit to this size |
| Sending by message | 1024px | Light enough to send quickly |
| Printing | Leave as is | Printing benefits from every pixel |
Phone photos are usually around 4000 pixels on the long side, so fitting to 1280 often cuts the file to a tenth of its size.
Rounding while the ratio is locked
In Exact size with the lock on, the other side is worked out from the first photo in the list and rounded to a whole pixel, so the result can land a pixel off. When a batch mixes different shapes, longest side or width is safer than exact numbers. To keep only part of a picture, cut it with Crop Image first.
Frequently asked questions
Can I resize several photos to the same size?
Yes. Choose a batch, set a longest side or width, and every photo is fitted to it. Press Save all (ZIP) to download them together.
My batch mixes portrait and landscape shots.
Fit by the longest side. Whichever side is longer is capped at the number you enter, so the photos end up looking evenly sized.
What format do I get back?
The same one you put in. JPG stays JPG, PNG stays PNG, WebP stays WebP, and the new dimensions are added to the file name.
Can I enlarge past the original?
Turn off the never-enlarge checkbox. The extra pixels are invented, so the bigger you go the softer it looks.
Can I resize without keeping the ratio?
Choose Exact size and press the lock-ratio button to switch it off. Width and height are then independent, and the picture stretches.
Are my files uploaded?
No. Resizing and saving happen entirely inside your browser.