Photo Resize Online — Free Photo Resizer

Resize a photo to exact pixels or to a target file size in seconds — right in your browser. Your files never leave your device. No account, no watermark, no limits.

Free image tools

How to resize a photo

1. Add your photo. Drop in a JPG, PNG or WebP — or click to browse. Nothing is uploaded; the file is read on your device.
2. Set the new size. Type an exact width and height in pixels, or drag the percentage scale. Leave "lock ratio" on so the photo is not stretched.
3. Download the resized photo. Check the preview and file size, then download. Repeat as many times as you like — there is no limit.

A free photo resizer that keeps your photos private

Most people don't think about image dimensions until a website rejects their upload, an email bounces because the attachment is too large, or a profile picture looks stretched and blurry. That's the moment you need a photo resize tool — something that changes an image's pixel dimensions or file size without installing software, creating an account, or waiting for an upload to finish. ResizeMate is exactly that: a free photo resizer that runs entirely inside your browser tab.

Resizing a photo is different from just making it smaller. Set exact pixel dimensions when a form or platform demands a specific size — a 600×600 profile photo, a 1200×630 banner, a 413×531 passport photo. Set a percentage instead when you just want a smaller file and don't care about exact numbers — dragging the scale to 50% roughly quarters the pixel count and the file size along with it. ResizeMate's resizer supports both, with a lock-ratio toggle so a photo never comes out squashed or stretched by accident.

What makes it a genuinely free photo resizer, not a free-trial-then-paywall one, is that the resizing itself happens on your device using your browser's own image-processing engine. Your photo is decoded, resized and re-encoded locally — it is never uploaded to a server, which means there's nothing to wait for, nothing to be logged, and no limit on how many photos you resize in a day. It works exactly the same for one photo or a hundred, since there's no server queue to get stuck behind.

Resizing is only the start. The same tool compresses JPG, PNG and WebP images to hit an exact file-size target in kilobytes — useful for the 20 KB and 50 KB caps that job portals, exam boards and government forms love to impose. It crops to a precise aspect ratio for Instagram, YouTube or a passport photo, and converts between PNG, JPG and WebP so an image opens wherever it needs to. If you have a whole folder to get through, the bulk resizer applies one size to every file at once, with no file-count limit.

A couple of jobs sit just outside plain photo resizing, and ResizeMate covers those too. iPhone photos save as HEIC by default, a format that Windows and most non-Apple software still can't open — the HEIC to JPG converter decodes them in your browser and hands back a JPG that opens anywhere. And when a form wants your document as a single file under a strict size limit, Compress PDF shrinks a PDF properly, keeping the text selectable instead of flattening every page into a blurry image.

Resizing down is forgiving — shrinking a photo discards detail that was already there, and the result stays sharp all the way from full size down to a thumbnail. Enlarging is the one direction to be careful with: stretching a small photo up can't invent detail that was never captured, which is why ResizeMate's "don't enlarge" option exists — it stops a low-resolution image being blown up into a soft, blurry one.

Every tool here shares the same rule: your files stay on your device, there's no signup screen between you and the download button, and nothing you export carries a watermark. Whether you need to resize a single profile picture or batch-process a folder of product photos, that's the whole point of a free photo resizer — get the image you need, in the size you need it, without handing your files to a stranger's server to do it.

Which image format should you use?

Rule of thumb: photos → JPG or WebP; anything with transparency or text → PNG or WebP.

Photo resize by pixels or by percentage?

Use pixels when something else decides the size for you — an upload form that demands 600×600, a profile picture slot, a print template. Type the exact numbers and leave "lock ratio" on so the image is not stretched.

Use percentage when you simply need the file smaller and nothing depends on exact dimensions. Scaling a photo to 50% halves its width and height, which removes about three quarters of the pixels and usually shrinks the file by a similar margin.

If you enter a width and a height that do not match the original proportions, "lock ratio" recalculates the second number for you. Turn it off only when you genuinely want to distort the image.

How far can you shrink an image before it looks bad?

Scaling down is forgiving — you are discarding detail that was there, and the result stays sharp. Scaling up is not: enlarging cannot invent detail that was never captured, so a 400 px image stretched to 1600 px will look soft in any tool. That is what the "don't enlarge" checkbox prevents.

Percentages apply to width and height, so the pixel count falls by the square — halving the dimensions leaves a quarter of the pixels.

Why use ResizeMate

Frequently asked questions

How do I resize a photo?

Drop the photo into the tool above, enter the width and height you need in pixels (or choose a percentage), then download. The whole photo resize happens on your device, so there is nothing to upload and nothing to wait for.

Is this photo resizer free?

Yes — completely. Every tool here is free and unlimited, with no signup, no trial, no watermark and no cap on how many photos you resize.

How do I resize a photo on an iPhone?

Open resizemate.com in Safari, tap the drop zone and choose the photo from your library, set the width and height you need, then tap download — it saves to Files or Photos. iOS has no built-in resize in the Photos app, and because this runs in the browser there is no app to install. HEIC photos work here too; they come back as JPG.

How do I resize a photo on Android?

Open resizemate.com in Chrome or any browser, tap the drop zone and pick the image from Gallery or Files, enter the new size, then download — it lands in your Downloads folder. Nothing is uploaded and there is no app to install, so it works the same on any Android phone or tablet.

How do I resize a photo in cm instead of pixels?

Photos are stored in pixels, so a size in centimetres only becomes fixed once you choose a print resolution. The conversion is pixels = cm ÷ 2.54 × DPI. At the usual 300 DPI, a 3.5 × 4.5 cm photo is 413 × 531 px, and a 5 × 7 cm one is 591 × 827 px. Work out the pixel figure that way and type it in — or use the passport photo tool, whose presets are already sized from the millimetre specs at 300 DPI.

Are my images uploaded to a server?

No. Every tool on ResizeMate runs entirely in your browser using your device. Your images never leave your computer.

Can I resize a photo to an exact file size in KB?

Yes. Use the compress tools to hit a target such as 20 KB, 50 KB, 100 KB or 1 MB — useful when a form rejects anything larger.

What formats are supported?

PNG, JPG/JPEG and WebP for resizing and compression, plus HEIC as an input when you convert iPhone photos to JPG.