Image Resizer — Resize Images Free Online
Resize any image to exact pixel dimensions instantly. No signup, no watermark, no upload to servers — all processing happens in your browser.
How to Resize an Image Online
Upload your image using the button above, enter your target width and/or height in pixels, choose whether to lock the aspect ratio, select your output format (JPEG, PNG, or WebP) and quality, then click Resize. Your resized image downloads instantly — no server upload required.
Supported Image Formats
Upload JPEG, PNG, WebP, GIF and most other common image formats. Output is available as JPEG (smallest file size), PNG (lossless, best for screenshots and graphics), or WebP (modern format, excellent compression). For photographs use JPEG; for graphics and screenshots use PNG.
Frequently Asked Questions
JPEG compression reduces file size with minimal quality loss — set quality to 90%+ for best results. For lossless resizing, choose PNG output. WebP gives the best balance of quality and file size.
The tool handles images up to your browser's memory limit — typically 20-50MP. For very large images, use the quality slider to reduce output file size.
No — all resizing happens locally in your browser using the Canvas API. Your images are never sent to any server or stored anywhere.