ImageAdjustable qualityRuns in your browser

Resize Image

Scale images to an exact size, fit them in a box, or crop to fill. Some detail is discarded to fit the target format; how much depends on the format and your settings.

Not uploaded to any serverConverted on this deviceGone when you close the tabHow this works

Drop your files here

JPG, PNG, WebP, AVIF and 6 more formats · up to 120 MB each

or paste files from your clipboard

Ready when you are

Scale images to an exact size, fit them in a box, or crop to fill. Everything happens in this tab; nothing is sent anywhere.

⌘K to search converters

How to use it

1
Add your files
Resize Image works with JPG, PNG, WebP, AVIF, TIFF, BMP, HEIC, HEIF, GIF and SVG. Drop them in, browse for them, or paste from your clipboard.
2
Choose your options
Tune quality, dimensions and metadata removal — or leave the defaults, which are sensible.
3
Run it and download
Press the button and save the result. Everything happens on your device, and nothing is uploaded.

Privacy, in plain words

Is it safe? Your image is not uploaded anywhere

What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.

What happens instead. This site does not do it. There is no server here that receives files, so your image is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.

Check it yourself in ten seconds

Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.

The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.

Why this matters more than it sounds

Photographs carry more than what is in the frame — most also carry the time, the device and often the GPS coordinates where they were taken. It matters more than it sounds, because of what images usually are:

Screenshots of private messages

conversations that included other people

Photos of ID cards and licences

the usual way people send identity documents

Screenshots of bank transfers

account details, and proof of what you paid whom

Medical scans and photographs

X-rays, results, images of a condition

A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.

Fit, fill and stretch

Resizing changes how many pixels an image has. The only real decision is what happens when the shape you want does not match the shape you have, and the three answers are genuinely different.

Fit inside a box: The whole image is kept and made as large as it can be within your dimensions. Nothing is cropped, so the result may be narrower or shorter than the box.
Fill and crop: The box is filled exactly and whatever hangs over the edge is cut. Right for avatars and thumbnails, wrong when the edges matter.
Stretch to exact: Both dimensions are forced. This distorts the picture unless the proportions already matched, and it is almost never what someone wants.

Making an image larger

Enlarging cannot add detail that was never captured. A 400-pixel image asked for 1600 pixels has to invent three pixels for every one it has, and inventing them means guessing from the neighbours — the result is softer, not sharper.

Going down is lossless in the way that matters: a smaller image genuinely contains less, but every pixel it keeps is real. Going up is always a reconstruction.

Measured, not estimated

What this tool actually does to a file

Halving each photograph's dimensions, from 800×600 to 400×300.

On every sample measured, the result came out smaller — 5% smaller at worst and 7× smaller at best.

Each row is one document, chosen because this tool behaves differently depending on what is inside the file.
Sample	In	Out	Change
Smooth gradientContinuous tone with no detail — the easiest thing to compress, and where banding shows first.	12.5 KB	5.1 KB	−59%
Hard-edged text and UIHigh-contrast edges. This is where JPEG's ringing artefacts appear and where PNG wins.	90.9 KB	34.9 KB	−62%
Film-like noiseRandom detail. Incompressible by design — the worst case for every lossy codec.	209 KB	31.4 KB	−85%
Flat colour blocksLarge areas of one colour — a logo or a chart. Lossless formats should crush this.	4.9 KB	4.7 KB	−5%
Soft alpha edgeA transparent gradient. JPEG cannot store it at all, which is the single most common reason a conversion surprises someone.	14.3 KB	5.3 KB	−63%

Produced by a stand-in encoder. Your browser's own encoder has no equivalent outside a browser, so this was measured with the same codec at the same quality from a different implementation. Expect the shape of the answer to hold and the exact bytes to differ.

Samples are generated from a fixed seed rather than taken from real photographs or documents, so the corpus is reproducible and carries no licensing question — and so the numbers predict the shape of your result rather than its exact size. Measured 2026-10-01. The method, and the command that regenerates every figure on this page, are on the how it works page.

About these formats

Accepts

JPEG Image

The universal lossy photo format.

Extensions: .jpg, .jpeg, .jpe, .jfif
MIME type: image/jpeg
Best for: Photographs · Email and messaging · Maximum compatibility
Compatibility: Opens everywhere — every browser, OS and device.

Accepts

Portable Network Graphics

Lossless image format with full alpha transparency.

Extensions: .png
MIME type: image/png
Best for: Transparency · Graphics and logos · Screenshots
Compatibility: Universally supported.

Good to know

Resize Image — questions

How does Resize Image work?

Scale images to an exact size, fit them in a box, or crop to fill. Add your files above, adjust anything you want to change, and press the button. The result downloads straight to your device.

Is Resize Image safe — are my files uploaded to a server?

No, nothing is uploaded. On most online tools, pressing the button copies your file across the internet onto a computer owned by that website, where it is processed and then sent back. That copy is what "upload" means. This tool does not do it: your file is read and processed by the browser you are using right now, stays on this device the whole time, and is discarded when you close the tab. Turn off your Wi-Fi after the page loads and it still works, which is the quickest way to confirm it.

Can I use this on confidential or personal documents?

Yes — that is the case it was built for. Because the file never leaves your device, a confidential document is no more exposed than it is sitting in your own folder: there is no transfer, no copy on anybody else's hardware, no retention period and no staff with access. Nothing about the file is logged either — not its name, not its size, not its contents.