📋 How to Use
- Upload an image.
- Enter width and height in pixels. Turn Keep aspect ratio on to auto-fill the other side.
- Download the resized image.
Upscaling can look soft. Processing happens in your browser.
Image Resize
Resize an image to exact pixel dimensions. Lock the aspect ratio so nothing gets stretched. Files stay local — no upload, no waiting.
Use NowImage Resize
Resize an image to exact pixel dimensions. Lock the aspect ratio so nothing gets stretched. Files stay local — no upload, no waiting.
- Upload Image: Drag image or click to select
- Width / Height: Keep aspect ratio
- Download: Your files stay on your device. Nothing gets uploaded — conversion runs entirely in this browser window.
Your files stay on your device. Nothing gets uploaded — conversion runs entirely in this browser window.
💡 Example
📱 Social media recommended sizes
Each platform has its own recommended image dimensions: Instagram posts work best at 1080×1080px (square) or 1080×1350px (portrait). Twitter/X headers are 1500×500px. Resize your image to exact pixel dimensions before uploading to avoid automatic cropping by the platform.
📧 Email attachment size limit
A 4000×3000px photo from a modern camera can be 5–10 MB, which often exceeds email attachment limits. Resize to 1200×900px first — this keeps the image clear enough for most purposes while reducing the file size significantly.
🌐 Website upload size limit
Many CMS platforms and online forms limit uploads to 1 MB or 2 MB per image. Resize your image first to reduce its pixel dimensions, then use the compress tool if you still need a smaller file size.
✨ Resize vs compress
This changes pixel dimensions. Turning aspect ratio off allows non-uniform scaling (usually looks bad on photos).
Upscaling invents new pixels; it will not add real detail. For print, start from the largest source you have.
Highlights
- Pixel width and height inputs.
- Optional aspect ratio lock.
- No server upload.
Shop image specs, blog max width, attachment size limits.
Good use cases
- Camera originals too large for a website
- Thumbnail long edge to 400–800 px
- Match one dimension and auto-calc the other
- Reduce resolution before compressing further
Pair with other tools
Resize changes dimensions; Image Compress reduces file size at similar dimensions. Image Converter changes format only.
For exact print mm/DPI, verify in print software.
❓ Frequently Asked Questions
- Q. Is it really free?
- Yes. This resize tool is offered at no charge.
- Q. Do I need to sign up?
- No. Use it directly on this page.
- Q. Are images uploaded to a server?
- No. Resizing runs only in your browser; files are not sent to Webooro servers.
- Q. What's the difference with aspect ratio on vs off?
- On: Entering one dimension auto-calculates the other so the image doesn't stretch. Off: You can set width and height independently to intentionally stretch or squash.
- Q. Can I enlarge images?
- Yes, but enlarging adds pixels and can make the image look blurry. Downsizing usually preserves quality better.
- Q. Can I resize multiple images at once?
- Currently one image at a time. Upload each image separately — since processing is in the browser, each operation completes in seconds.
- Q. Is the file format preserved after resizing?
- Yes. PNG stays PNG, JPG stays JPG. To change format at the same time, use the Image Converter tool.
- Q. Is pixel size the same as file size?
- No. Pixel dimensions (width × height) and file size (KB/MB) are different. Reducing pixel count does reduce file size, but the same pixel dimensions can produce very different file sizes depending on format (WEBP vs. PNG vs. JPG) and compression.
📐 Set dimensions and download. See the FAQ for upscaling.
