Resize Image
Set the exact width and height you need, in pixels or as a percentage, and download the resized image in a couple of clicks. The whole thing runs in your browser, so the file never leaves your device.
How to resize a photo
- 1
Open your image
Drag a photo onto the editor, paste it from your clipboard, or click to browse. It opens immediately and stays on your device — nothing is sent anywhere.
- 2
Pick pixels, percent or a preset
Choose exact dimensions in pixels, switch to percentage to scale by a fraction, or tap a preset like Instagram story, Full HD, X header or A4 at 300 DPI.
- 3
Enter your dimensions
Type the size you need. With aspect-ratio lock on, filling in one value sets the other automatically. Unlock it only when you need a precise non-matching size.
- 4
Check the readout
The megapixel readout shows the size before and after. Retype the numbers as often as you like, and undo if you change your mind — enlarging beyond 2x suggests the AI Upscale tool instead.
- 5
Save the result
Export as PNG, JPG, WebP or AVIF at your chosen quality. The file downloads straight to your device, free and without a watermark.
Why use PicStudio for this?
Most resize jobs start with a hard number someone handed you. A storefront wants product shots at 1000px on the long edge. A forum caps avatars at 256x256. An email bounces because the attachment is a 6000px camera original. Type the dimensions into the width and height fields, switch to percentage mode when you only know you want something half its current size, or grab a preset — Instagram post or story, Full HD, YouTube thumbnail, X header, Facebook cover, even A4 at 300 DPI for print — and the new file is ready to save right away, with a megapixel readout showing the before and after.
Resize by pixels or percent with smart aspect lock.
The aspect-ratio lock does the arithmetic you would otherwise do in your head. With it on, set the width and the height updates to match the original proportions, so a 3000x2000 photo never comes out looking squeezed. Turn the lock off only when a layout demands an exact mismatched size, like a 1200x630 social card from a portrait shot — and in that case cropping to the ratio first usually looks better than letting the image stretch.
Resampling quality matters most when you scale down, which is the common case. Going from a 4000px original to 1200px throws away three quarters of the pixels, and a crude shrink leaves edges jagged; PicStudio resamples so lines and text stay clean. Enlarging is the harder direction — plain resampling has no real detail to invent past the source resolution — so when you push past 2x, the tool flags it and offers a one-click jump to the AI Upscale tool, which reconstructs edges and texture instead of just stretching pixels.
Because everything is processed on your device and never uploaded, there is no progress bar waiting on a server and nothing of yours sitting in someone's cloud. It is free with no account and no watermark across your work. When you save, choose the format that fits: PNG for logos, screenshots and anything with transparency, JPG when a small photo file is the goal, or WebP for the web. Need it lighter on disk too? Run it through the compressor afterward. Want a square crop first? Crop, then resize.
- Free forever
- No upload
- No watermark
- No sign-up
Frequently asked questions
Is the image resizer free?
Yes. Resizing is free with no sign-up, no watermark and no limit on how many images you resize.
Are my images uploaded to a server?
No. The resize runs entirely in your browser, so the image is processed on your device and never uploaded. That is why there is no waiting and nothing of yours is stored online.
Can I resize by exact pixels or by percentage?
Both. Enter a specific width and height in pixels, or switch to percentage mode to scale the whole image up or down while keeping its proportions.
How do I stop the image from looking stretched?
Keep the aspect-ratio lock on. With it locked, typing one dimension sets the other to match the original proportions, so the photo keeps its shape. Unlock it only when a layout requires an exact mismatched size.
Will resizing lower the image quality?
Scaling down stays sharp because of high-quality resampling. Plain enlarging past the original resolution softens detail — when you go beyond 2x, the tool points you to the AI Upscale tool, which reconstructs detail instead of stretching it.
Which formats can I open and save?
You can open JPG, PNG, WebP, GIF, HEIC, BMP and SVG, and export your resized image as PNG, JPG, WebP or AVIF.
Does it work on a phone?
Yes. The editor is responsive and works on phones, tablets, laptops and desktops, with the same in-browser processing on every device.