Only edit images you own or have permission to use. Everything happens on your device, so nothing is uploaded.
How it works
Four steps, no account, no upload, and no cropping unless you ask for it.
- Add your imagesDrop in one picture or a whole batch. Your browser opens them directly.
- Pick a sizeChoose Instagram, a YouTube thumbnail, a story, a slide or your own size.
- Nothing gets cutThe whole picture is kept and the gaps are filled by extending its own edges. Drag the preview to move the picture, or pick a plain, blurred or transparent background.
- DownloadSave one image or the whole batch as a ZIP, with clear file names.
Common image sizes
The sizes built into the tool, so you don't have to look them up.
| Where you post | Size (pixels) | Shape |
|---|---|---|
| Instagram post | 1080 × 1080 | Square |
| Instagram portrait | 1080 × 1350 | 4:5 |
| Story, Reel, WhatsApp status | 1080 × 1920 | 9:16 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
| Facebook post and link previews | 1200 × 630 | 1.91:1 |
| X (Twitter) post | 1600 × 900 | 16:9 |
| LinkedIn post | 1200 × 627 | 1.91:1 |
| Pinterest pin | 1000 × 1500 | 2:3 |
| Presentation slide | 1920 × 1080 | 16:9 |
| Blog or website image | 1200 × 675 | 16:9 |
| Profile photo | 800 × 800 | Square |
Resizing without wrecking the picture
Resizing sounds like it should be the one image operation that cannot go wrong. It goes wrong constantly, in three specific ways, and all three are avoidable once you know what causes them.
Enlarging does not add detail
Making an image smaller throws information away, which is fine — there was more than you needed. Making it bigger cannot put information back, because it was never recorded. A 500px image stretched to 2000px is the same 500px of detail spread over sixteen times the area, and it looks exactly as soft as that description suggests.
So when you need a large image, go back to the largest original you have rather than enlarging a small copy. If the original is genuinely gone, enlarge by the smallest amount you can live with: the damage scales with how far you stretch it.
Changing the shape distorts or crops — pick which
A 4:3 photo cannot become a 16:9 banner without something giving way. Every tool makes this choice somehow, and most make it silently. The fit options here make it explicit:
- Crop to fill — fills the frame exactly, cutting off whatever falls outside it. Best when the subject is near the centre and the edges do not matter.
- Keep the whole image — nothing is cut, and the gap beside it is filled, either with a colour, with transparency, or with a blurred copy of the picture itself. Best when the edges carry something you need.
- Drag to reposition — when you are cropping, you decide what stays. A centred crop is only right when the subject is centred, which it often is not.
The blurred fill is worth knowing about: it extends the picture's own colours outward, so a portrait photo dropped into a wide frame looks deliberate rather than letterboxed. It is the option most people want for social banners and never think to look for.
Repeated saving compounds
Each JPEG save re-compresses the whole image, including the compression artefacts from the last save. Resize once from the original rather than resizing a resized copy, and if you are going to edit further, keep an intermediate in PNG and compress only at the end.
Picking a size that is actually right
Two rules cover most situations.
For screens, think in pixels and double it. Most phones and many laptops have high-density displays, so an image shown in a 400px-wide slot wants to be about 800px wide to look sharp. Supplying exactly 400px makes it look soft on half the devices that see it.
For print, think in inches and multiply by 300. A 6×4 inch print wants roughly 1800×1200 pixels. Below about 150 pixels per inch, print quality falls off visibly.
The one place to resist doubling is email attachments and anything going into a document: there, file size matters more than pixel-perfect sharpness, and a 1200px image is almost always plenty.
Everything happens on your device
Your images are resized in your own browser. Nothing is uploaded, nothing is queued on a server, and there is no copy of your photographs anywhere but your device — which also means there is no upload wait, no file-size limit imposed by us, and no account to create. The privacy policy sets this out.
If you also need a different file format, the image converter handles that, and the watermark remover is here if a mark needs clearing first.
Questions
Need to clear a watermark first? Use the image watermark remover.
Is this image resizer free?
Yes. There is no sign-up, no watermark on your images and no limit on how many you resize.
Are my images uploaded?
No. Your browser does the resizing, so the files never leave your device.
What size should an Instagram post be?
1080 × 1080 pixels for a square post, 1080 × 1350 for portrait, and 1080 × 1920 for stories and reels. All three are built in.
What size is a YouTube thumbnail?
1280 × 720 pixels, which is also 16:9. Use the target-size setting to keep the file small.
How do I make an image smaller in KB?
Turn on "Target size" and pick a limit. The tool lowers the quality just enough to fit under it.
Will my picture be cut off?
No. By default the whole image is kept and the empty space is filled by extending the picture's own edges. You can also choose a blurred, white, black or transparent background, or switch to "Crop to fill" if you prefer.
Can I move the picture inside the frame?
Yes. Drag it on any preview, or use the Position setting. Double-click a preview to reset it.
Can I resize many images at once?
Yes. Add a batch, choose a size, then download them all as a ZIP.
Does it work on a phone?
Yes, in Chrome on Android and Safari on iPhone. Downloads open your share menu so you can save to your gallery.