Resize Image
Free Online Image Resizer - Resize, Convert & Optimize Instantly
A fast, privacy-first image resizer that runs entirely in your browser. Set exact width and height, scale by percentage, or pick a ready-made social, screen or print preset. Switch between JPG, PNG and WebP, fine-tune quality, and watch a live preview update instantly — with the new file size and percentage saved shown before you ever click download. No uploads, no sign-up, no limits.
How to Resize an Image
Drag & drop into the upload area, click to browse, or paste directly from the clipboard with Ctrl+V. JPG, PNG, WebP and more are supported.
Type an exact width or height, or use Quick Scale (25–100%) to resize proportionally. Lock the aspect ratio to avoid distortion, or swap width and height in one click.
Choose a ready-made size for Instagram, Facebook, Twitter/X, LinkedIn or YouTube, for HD/Full HD/4K screens, or for A4, A5 and US Letter print.
Keep the original format or convert to JPG, PNG or WebP. For lossy formats, drag the quality slider to balance sharpness against file size.
When the target ratio differs from the original, pick Cover, Contain or Stretch to control exactly how the image is cropped or padded.
The result and its new file size update live as you tweak settings. When it looks right, download the optimized image instantly.
Key Features
Every change re-renders the result automatically — no “apply” button, no waiting. What you see is exactly what you download.
Enter an exact width × height for precise control, or scale proportionally with 25 / 50 / 75 / 100% Quick Scale buttons.
Lock the ratio and the matching side is calculated automatically. Swap width and height instantly for portrait ↔ landscape.
Export as JPG, PNG or WebP, or keep the original format. PNG and WebP preserve transparent backgrounds.
Fit modes give you full control when the target ratio differs — crop the overflow, fit the whole image, or fill the frame exactly.
See the new file size and the percentage saved before downloading, so you can balance quality and weight with confidence.
One-tap sizes for social media, devices and print save you from memorizing pixel dimensions.
All resizing happens locally on the HTML canvas in your browser. Your images are never uploaded to any server.
Popular Use Cases
Exact dimensions for Instagram posts and stories, Facebook, Twitter/X, LinkedIn and YouTube thumbnails.
Shrink oversized images and convert them to WebP to cut page weight and speed up load times.
Produce uniform, correctly sized product photos for marketplaces and online stores.
Prepare A4, A5 and US Letter artwork at the right pixel dimensions for crisp printing.
Lightweight images that render quickly in inboxes without slowing down your campaigns.
Icons, splash screens and banners exported at precise sizes for any platform.
Pro Tips
Leave the aspect-ratio lock on whenever you can to avoid stretched, distorted images.
For web JPG and WebP, 80–90% is the sweet spot between sharpness and small file size.
Use Contain when the whole image must stay visible; use Cover when filling the frame matters more than the edges.
WebP delivers the smallest files at great quality and is supported by every modern browser.
Frequently Asked Questions
Are my images uploaded to a server?
No. All processing happens locally in your browser using the HTML canvas. Your images never leave your device, so your data stays completely private.
Will resizing reduce image quality?
Downscaling uses high-quality smoothing for crisp results. For lossy JPG and WebP you control quality with the slider, while PNG stays fully lossless.
Can I keep a transparent background?
Yes. Export as PNG or WebP (or keep the original format for a transparent source) and transparency is preserved. JPG has no transparency, so a white background is added automatically.
What is the difference between Cover, Contain and Stretch?
Stretch fills the exact dimensions and may distort the image; Contain fits the whole image inside and adds padding; Cover fills the frame and crops the overflow without distortion.
How do I resize by percentage?
Use the Quick Scale buttons (25, 50, 75, 100%) to scale the image proportionally from its original size — no manual math required.
Is there a file size or usage limit?
No. The tool is completely free with no watermarks, no account and no usage limits. Resize as many images as you like.
Whether you're prepping images for social media, a faster website, online stores or print, this resizer gives you precise control with a live preview and instant size feedback — all processed privately in your browser. Resize, convert and optimize in seconds, completely free.