Resize Image
Exact dimensions, with the sizes every platform actually wants — and a preview of what gets cropped before you commit to it.
Runs on your device — photos are never uploadedDrop your images here
or click to browse — as many as you like
JPG · PNG · WebP · HEIC
Fills the frame exactly and crops whatever does not fit.
Enlarging past the original cannot add detail that was never captured. The tool says so when it happens rather than quietly handing back something softer.
How it works
Three steps, no account, and the photos never leave your computer.
Drop the images in
Any number, including HEIC straight from an iPhone. Each shows its current dimensions so you know what you are starting from.
Pick a size
Type exact numbers, or press one of the presets. The preview shows what the frame will do to the shape before anything is produced.
Choose crop or pad, then save
Crop fills the frame and cuts the overflow. Pad keeps the whole picture and fills the gap. Download one at a time or as a ZIP.
What people resize for
A platform that demands an exact size
YouTube thumbnails, LinkedIn banners and Facebook covers are all fixed rectangles. Getting the number right is most of the job.
Making a site load faster
Serving a 4000 pixel photo into an 800 pixel slot wastes most of what the visitor downloads. Resizing first is the largest single saving available.
Batch work for a shop or a listing
Marketplaces usually want every image the same size. Doing forty at once beats doing forty one at a time.
Printing at a known size
Print wants pixels, not inches: A4 at 300 dpi is 2480 by 3508, and that preset is here so you do not have to work it out.
Crop or pad, and other things a resizer has to decide
Resizing sounds like one operation and is really two. Changing how many pixels an image has is arithmetic. Deciding what to do when the shape you want does not match the shape you have is a judgement, and it is the part that goes wrong.
The two honest answers
A 4000 by 3000 photo is a 4:3 rectangle. An Instagram square is 1:1. Something has to give, and there are exactly two options that do not distort the picture:
Crop to fill. Scale the image until it covers the frame completely, then cut away whatever hangs over the edges. Nothing is stretched and nothing is padded, but you lose the edges — which for a portrait means the sides, and for a landscape means the top and bottom.
Pad to fit. Scale until the whole image is inside the frame, then fill the leftover space with a colour. Nothing is lost, but the picture no longer fills the frame and the bars are visible.
There is a third option that tools sometimes take silently, which is to stretch the image to the new shape. That distorts faces and text and should never be a default. It is not offered here.
Which of the two is right depends entirely on the job. For a social post where the frame is fixed and the audience is scrolling, crop — the platform will crop it anyway, and doing it yourself means choosing what survives. For a product photo, a document, or anything where cutting the edges loses information, pad.
Why the preview matters
The most common resizing complaint is not that the size was wrong but that something important got cut off — a head, a caption, a logo in a corner. That is invisible until after the export, by which point it is a second attempt.
The small diagram beside the controls shows the frame and what will sit inside it before anything is produced. It is not a full preview of the picture; it is a preview of the decision, which is the part that is actually in doubt.
Enlarging does not add detail
Making an image bigger than it was captured cannot invent information. A 600 pixel image asked for 1600 pixels is stretched across more pixels, and the result is softer than the original, not sharper.
This is worth stating because platforms sometimes demand a minimum size, and the honest answer is to upload something soft rather than nothing. But it is a trade, not a free improvement, and the tool says so when it happens rather than handing back a bigger, blurrier file without comment.
The one reliable fix is going back to the original. Phone photos are usually far larger than the copy that reached you through a messaging app, and a message-sized image cannot be recovered by enlarging it.
Sizes worth knowing
| Where | Pixels | Shape |
|---|---|---|
| Instagram square post | 1080 × 1080 | 1:1 |
| Instagram portrait post | 1080 × 1350 | 4:5 |
| Story, Reel, Short, TikTok | 1080 × 1920 | 9:16 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
| LinkedIn banner | 1584 × 396 | 4:1 |
| A4 at 300 dpi | 2480 × 3508 |
Vertical formats are worth a note. A 9:16 story frame is far taller than any camera shoots, so cropping a normal photo to it removes most of the width — often including whatever was on the left and the right. For those, padding with a colour that suits the image frequently looks more deliberate than a hard crop.
Resize before you compress
If the goal is a smaller file rather than a particular shape, dimensions do far more work than quality does. Halving each side quarters the pixel count before compression is applied at all.
The sensible order is to resize to what will actually be displayed, then compress what remains. Our image compressor handles the second half, including hunting for a specific file size when a form demands one.
Nothing is uploaded
Images are decoded, redrawn and encoded in your browser. There is no server, which is why there is no account, no batch limit and no watermark on the result.
Common questions
Are my photos uploaded anywhere?
No. They are decoded, redrawn and encoded in your browser using your own processor. Nothing is transmitted, which is why there is no account, no batch limit and no watermark.
What is the difference between crop and pad?
Crop scales the image until it covers the frame and cuts what hangs over — nothing is padded but you lose the edges. Pad scales until the whole picture fits and fills the leftover space with a colour — nothing is lost but the frame is not full. Stretching, which distorts faces and text, is not offered.
Will resizing stretch or distort my image?
Never. Both modes keep the original proportions — one crops the excess, the other pads the shortfall. A tool that stretches to fit is producing a distorted picture, which is why that option does not exist here.
Can I make a small image bigger?
Yes, but it cannot add detail that was never captured, so the result is softer than the original. Where a platform demands a minimum size that is still the right answer — the tool just tells you it happened rather than staying quiet about it.
What size should I use for Instagram or YouTube?
1080 by 1080 for a square post, 1080 by 1350 for portrait, 1080 by 1920 for a story or reel, and 1280 by 720 for a YouTube thumbnail. All of those are presets here, so you do not have to remember them.
Should I resize or compress to make a file smaller?
Resize first, then compress. Halving each side quarters the pixel count before any compression is applied, which is a far larger saving than the quality dial gives you. The compressor handles the second step.
Does it keep transparency?
Saving as PNG does, including in the padded area. JPG has no transparency at all, so a transparent background becomes the padding colour you choose — white by default.
More tools
Every one of them runs on your device. No uploads, no accounts.