Free Online Image Resizer
Resize JPG, PNG, WebP, AVIF, and HEIC photos to exact dimensions, aspect ratios, or presets without losing quality. 100% private with zero uploads.
Drop your image here
- JPG
- JPEG
- PNG
- WEBP
- +11
1200×800 px
From 1920×1280
1.0 MB → 558 KB
File size, 46% smaller
JPG → WebP
Format
100% private. Nothing is uploaded.
Resize Image Example: Before and After
How to Resize an Image Online
Upload Your Image
Drag & drop or click to upload the image you want to resize. Supports JPG, PNG, WebP, and AVIF formats.
Choose Size Settings
Set your desired dimensions in pixels or percentage. Use social media presets for Instagram, Facebook, or Twitter sizes.
Download Resized Image
Click download to save your resized image instantly. No watermarks, no registration required.
Resize Image Online: What You Get
Lightning Fast Processing
The resize runs on your own device, so there is no upload and no queue. Type a new width and the height follows to keep the shape. Then pick a format and press Resize & Download. Our test photo went from 1920×1280 to 1200×800.
Premium Quality Results
The resizer picks a sharp filter for you when you shrink a photo, so fine detail holds up. The loupe shows our 1200×800 test file at full size. You can also set the quality, add sharpening or choose the filter yourself.
- Social Media Presets
- 100% Private & Secure
- Completely Free
- No Set File Size Limit
Resize Images for Any Purpose
Photography & Printing
- Resize photos for professional printing at 300 DPI
- Create portfolio images at exact dimensions
- Maintain aspect ratio for gallery layouts
- Batch resize entire photo shoots
Social Media
- Instagram posts (1080×1080) and stories (1080×1920)
- Facebook covers (1200×630) and profile pictures
- LinkedIn banners (1584×396) and post images
- Twitter headers and thumbnails
E-Commerce & Web
- Product images for Shopify, Amazon, Etsy
- Optimize images for faster page load times
- Create consistent thumbnail sizes
- Responsive images for mobile and desktop
What Is Image Resizing?
Image resizing changes the width and height of a picture in pixels, so the whole image gets bigger or smaller. Cropping is different: it cuts away the edges to change what is in the frame. Compressing is different too: it makes the file smaller in KB or MB but keeps the same width and height.
Resize an Image to a Specific Size
Most sites, forms and printers ask for an exact width and height. The answers below help you pick the right setting, keep the picture's shape and stay under a file size limit.
Pixels, Percentage or Preset: Which Should You Use?
Use pixels for an exact size, percentage to scale the whole image, and a preset for a common target.
- Pixels: type the width and height you were given, such as 1200×800.
- Percentage: drag the slider from 1% to 200%. At 50%, both sides are cut in half.
- Preset: pick a ready-made size for social posts, favicons, avatars, email headers or print. You can save your own sizes too.
How Do I Resize an Image Without Stretching It?
Keep the aspect ratio lock on. Then a new width sets the height for you, so the picture keeps its shape. For a size that doesn't match that shape, unlock it and pick how the image fills the frame:
- Fit: keeps the shape inside your size. One side may come out shorter.
- Contain: keeps the whole picture and fills the gap with a color. PNG and WebP can leave the gap clear.
- Cover: fills the whole frame and trims the extra from the edges. Size presets use this mode.
- Stretch: forces the exact size, which can squash or stretch the picture.
How Do I Resize an Image to a Smaller File Size in KB?
Save as JPG, WebP or AVIF and enter a Target File Size in KB or MB. The resizer lowers the quality until the file fits, then lowers the width and height if it still won't fit. To shrink a whole batch to a KB limit, use the image compressor.
Does Resizing an Image Reduce Its Quality?
Shrinking an image usually keeps it sharp, but enlarging it past its original size makes it softer. That is because the new pixels are guessed from the old ones. SVG files are the exception: they are redrawn at the new size and stay sharp. Always start from the largest copy you have.
Does Changing the DPI Change the Image Size?
No. DPI only tells a printer how many pixels to fit in an inch, so the size in pixels stays the same. For a 300 DPI print, multiply inches by 300: a 4×6 inch photo needs 1200×1800 pixels. Set DPI under Advanced. The A4, A5 and Letter presets are already 300 DPI sizes.
More Free Image Tools
Explore our full suite of browser-based image tools
Image Compressor
Reduce file size without visible quality loss
Image Converter
Convert between JPG, PNG, WebP, AVIF and more
Image Cropper
Crop images to any aspect ratio or custom selection
Add Watermark
Protect images with text or logo watermarks
Check Image Dimensions
See an image's width and height in px, cm or inches before you pick a new size.
Image Resizer FAQ — Everything You Need to Know
Clear answers to common questions about resizing images with PicsSizer.
What is PicsSizer's Free Online Image Resizer?
It is a free tool that changes the width and height of an image in your browser. Resize by pixels, by percentage or with a preset for social posts, favicons, avatars, email headers and print. It opens JPG, PNG, WebP, AVIF, HEIC, GIF, SVG, BMP, TIFF, PSD and more. It saves as JPG, PNG, WebP or AVIF, with no account and no watermark.
How do I resize images online using PicsSizer?
Resizing takes three steps. First, drop your image on the upload box, browse for it, or paste it with Ctrl+V (Cmd+V on a Mac). Next, type a new width and height, drag the percentage slider, or pick a preset. Keep the lock on to keep the picture's shape. Then choose JPG, PNG, WebP or AVIF and press Resize & Download. There is no set file size limit, but very large files use more memory and can be slow on older phones.
Which image formats are supported by PicsSizer's Image Resizer?
You can open JPG, PNG, WebP, AVIF, HEIC, HEIF, GIF, SVG, BMP, TIFF, HDR, JP2, PSD and Fujifilm RAF files. You can save the result as JPG, PNG, WebP or AVIF. JPG, WebP and AVIF give small files for photos. PNG keeps sharp edges and see-through areas in logos and screenshots. WebP and AVIF can keep see-through areas too. JPG, PNG, WebP and AVIF sources keep their format by default; other formats default to JPG, and SVG defaults to PNG.
Is PicsSizer's Image Resizer completely free?
Yes. The resizer is free, with no account, no watermark and no daily limit. Every setting is included: pixel, percentage and preset sizes, the aspect ratio lock, fit modes, Target File Size, quality, DPI, sharpening and the resampling filter. To resize many images at once, use the free bulk image resizer.
Do I need to register or create an account to resize images?
No. Open the page, drop an image, set the size and download it. There is no sign-up, no email and no login. Your image is resized on your own device, so it is never sent to us. By default the resizer also strips EXIF data, such as camera details and GPS location, from the new file. You can turn that off under Advanced.
How does PicsSizer maintain image quality while resizing?
The resizer uses ImageMagick's resampling filters. On Auto, it uses Lanczos when you shrink an image, which keeps fine detail sharp, and Mitchell when you enlarge one, for smoother edges. Under Advanced you can pick Lanczos, Mitchell, Bilinear or Nearest yourself. Nearest keeps hard pixel edges, which suits pixel art. You can also set the quality for JPG, WebP and AVIF and add sharpening. Enlarging past the original size always softens a photo, so start from the largest copy you have.
What are the recommended image sizes for social media platforms?
Common sizes are 1080×1080 px for an Instagram square post, 1080×1350 px for a portrait post and 1080×1920 px for Stories and Reels. Facebook link posts use 1200×630 px and covers 820×312 px. X posts use 1600×900 px and headers 1500×500 px. LinkedIn posts use 1200×627 px and covers 1584×396 px. Pinterest pins use 1000×1500 px. The resizer has a preset for each of these, plus YouTube and TikTok. A preset fills the frame and trims the extra from the edges.
Can I resize images for professional printing?
Yes. For a sharp print, aim for 300 pixels per inch. Multiply each side in inches by 300: a 4×6 inch photo needs 1200×1800 px, and an 8×10 inch print needs 2400×3000 px. The A4, A5 and Letter presets are already 300 DPI sizes. You can also set the DPI value under Advanced, which tells the printer the print size without changing the pixels. Save as PNG for no quality loss, or as JPG at high quality for a smaller file.