Image Resizer
Resize any image to exact pixel dimensions. Lock aspect ratio, choose output format, and download instantly — no uploads needed.
Drop an image to resize
PNG · JPEG · WebP · BMP
Frequently Asked Questions
Will resizing an image reduce its quality?
Downscaling (making smaller) is generally lossless in perceived quality. Upscaling (making larger) uses bilinear interpolation and may look blurry. For JPEG output you can also adjust the quality setting.
How does aspect ratio locking work?
When locked (🔒), changing the width automatically updates the height to maintain the original proportions, and vice versa. Unlock it to set independent dimensions.
What output formats are supported?
PNG (lossless), JPEG (lossy, smaller files), and WebP (modern format, excellent compression). The output file is named with the new dimensions for easy reference.
Is there a maximum image size?
Browser memory limits apply. Very large images (above ~8000×8000px) may cause slowdowns. For extreme sizes, a desktop image editor is recommended.
Common Standard Image Sizes
| Use case | Size (px) |
|---|---|
| Twitter / X profile photo | 400 × 400 |
| Twitter / X header | 1500 × 500 |
| Facebook cover photo | 820 × 312 |
| Instagram post (square) | 1080 × 1080 |
| Instagram Story / Reel | 1080 × 1920 |
| LinkedIn profile photo | 400 × 400 |
| YouTube thumbnail | 1280 × 720 |
| OG image (Open Graph) | 1200 × 630 |
| Full HD wallpaper | 1920 × 1080 |
PPI vs DPI: What’s the Difference?
PPI (pixels per inch) describes screen resolution — how many pixels fit in one inch of a display. A 96 PPI screen is a standard desktop monitor; a 460 PPI display is a modern smartphone screen.
DPI (dots per inch) is a print term — how many ink dots a printer lays down per inch. For print, 300 DPI produces sharp results. For web, resolution is irrelevant because browsers only care about pixel dimensions, not DPI metadata.