Website and blog images
Match your hero, card, thumbnail, and CMS dimensions before you publish, so pages load fast and look sharp.
Resize photos to exact pixel dimensions
Free Image Resizer Online
Resize JPEG, PNG, or WebP images to any width and height in pixels, keep the aspect ratio locked, and download with no watermark. Free with sign-in, and it never uses credits.
Runs in your browserFree with sign-inNo watermark
Resize your image
nano-banana-pro-resize-sample.webp
1200 × 900 · 171.4 KB · WebP
Output format
Quality
90%Your original never leaves your device — everything happens in your browser. Only a small preview is sent for a quick safety check, and it's deleted after an hour.
Result
Add an image and pick your settings — the result shows up here, ready to download.
- 1Choose an image
- 2Set width and height
- 3Resize and download
Resize images for websites, social media, and email
Get the exact pixel dimensions your website, social feeds, email, and documents call for — in a few seconds, right in your browser.
Social media sizes
Prep posts, profile pictures, cover photos, and ad creatives at the exact size each platform expects — no surprise cropping.
Email and documents
Shrink oversized photos before dropping them into an email, slide deck, or Word document.
How to resize an image online
Three quick steps from choosing an image to downloading it.
Choose an image
Drop in a JPEG, PNG, or WebP, or try the sample image.
Set width and height
Type a new width or height — with the aspect ratio locked, the other side follows automatically.
Resize and download
Click Resize image, check the result, and download it straight to your device.
Resize to exact pixel dimensions, without distortion
Type a size, lock the ratio, pick a format — that's all it takes.
Exact pixel dimensions
Type any width and height up to 12,000 px per side — perfect for hitting a required size to the pixel.
Aspect ratio lock
Change one side and the other updates automatically, so nothing ends up stretched or squashed.
JPEG, PNG, and WebP
Open a JPEG, PNG, or WebP and save in whichever of the three you need. PNG and WebP keep transparent backgrounds intact.
Need a smaller file too?
Once the dimensions are right, open the result in Compress Image to cut the JPEG or WebP file size even further.
Free Image Resizer FAQ
Answers about free image resizing, exact pixel sizes, social media dimensions, supported formats, privacy, and image quality.
1
Is the image resizer free, and do I need to sign in?
Yes, it's free. You just need a Nano Banana Pro account — signing in takes a few seconds. Resizing doesn't use any credits and never adds a watermark. The optional AI Image Upscaler is a separate feature that does use credits.
2
Is my image uploaded to Nano Banana Pro?
Not the original. Resizing happens in your browser, and the resized file is created on your device. The only thing sent to our servers is a small preview for a quick safety check, and it's deleted after an hour.
3
How do I resize an image to a specific size in pixels?
Type the width or height you need. With the aspect ratio locked, the other side is worked out for you; unlock it when you need an exact width and height that don't match the original proportions.
4
What size should I use for Instagram, Facebook, or YouTube?
Popular sizes: Instagram square posts 1080 × 1080 px, portrait posts 1080 × 1350 px, Stories and Reels 1080 × 1920 px; Facebook cover photos 820 × 312 px; YouTube thumbnails 1280 × 720 px; LinkedIn and most profile photos 400 × 400 px. If the proportions differ from your photo, crop it in your phone's photo app first, then resize it here so nothing gets stretched.
5
Can I resize by percentage, or in inches or centimeters?
The tool works in pixels, which is what screens and websites use. To scale by percentage, enter that fraction of the current width — 50% of 4000 px is 2000 px — and the height follows. For print sizes, multiply inches by the print resolution: a 4 × 6 inch photo at 300 DPI is 1200 × 1800 px.
6
Can I resize an image without losing quality?
Resizing down removes pixels, but the image usually stays sharp at its intended display size, especially as PNG or a high-quality JPEG/WebP. Enlarging is different: resizing can't add detail that isn't there, so use AI Image Upscaler when you need a larger, sharper result.
7
Which image formats can I resize?
You can open JPEG, PNG, and WebP files and save the result as JPEG, PNG, or WebP. That covers most phone photos, screenshots, and web graphics.
8
What happens to a transparent PNG?
PNG and WebP keep transparency. JPEG doesn't support it, so if you export a transparent image as JPEG the see-through areas are filled with white.
9
Does resizing also reduce the file size?
Usually, yes — fewer pixels means a smaller file. If you need it even smaller, open the result in Compress Image and lower the quality.
10
Does the resized image keep EXIF data like location?
No. The downloaded file is re-encoded in your browser, so it doesn't carry the original's EXIF metadata, including camera details and GPS location — handy if you're sharing photos publicly. Orientation is applied first, so the image still looks the right way up.
11
Can I resize GIF, HEIC, or SVG files?
Not yet. Right now the tool handles JPEG, PNG, and WebP. Convert your file to one of those first — for iPhone photos, sharing or exporting as JPEG usually does it.
12
Can I resize several images at once?
Not yet — it's one image at a time for now. Each resize only takes a few seconds, though.
13
Does resizing crop or stretch the image?
The tool doesn't crop the image. Keep the aspect ratio locked to avoid distortion; if you unlock it and enter a different proportion, the image stretches to fit the exact width and height.
14
Does it work on my phone?
Yes. Open the page in Safari or Chrome on iPhone or Android, pick a photo from your camera roll, and download the resized copy — no app needed.
Resize an image online for free
Sign in, choose a photo, enter the exact dimensions, and download a watermark-free JPEG, PNG, or WebP. No credits needed.