Free Online Image Resizer
Resize your images to any dimension. Perfect for social media, websites, email attachments, and more.
Choose new size and format
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How to Resize an Image Online
Use this free online image resizer to change the size of any picture. Upload a JPG, PNG or WEBP, choose your preferred unit, set width and height, adjust resolution, pick an output format, and download a high‑quality result. The tool supports pixels, percentages, centimeters and inches, plus DPI for print.
Step‑by‑Step Guide
- Select your file with the upload button.
- Percent, Pixels, Centimeters or Inches.
- Enter Width and Height. Turn on the lock to keep both equal for a square result.
- Set Resolution (DPI) for print outputs. 300 DPI is typical for high‑quality prints.
- Pick the output Format: JPG, PNG, or WEBP.
- Click Resize Image to process and download.
Best Practices
- Use Pixels for web images to match exact display sizes.
- Use Centimeters/Inches with DPI when preparing files for print.
- Choose WEBP for smaller files and modern browsers; choose PNG for graphics with transparency.
- Keep quality near 90% for a good balance of file size and clarity.
FAQs
How do I keep the image square?
Enable the lock. With lock on, height matches width across all units.
What DPI should I use for printing?
300 DPI is standard for high‑quality prints. Posters can range from 150 to 300 DPI depending on viewing distance.
Does DPI affect how images look on screens?
No. DPI is a print setting. Screen display uses pixels.
How do pixels convert to centimeters or inches?
Centimeters = (pixels ÷ DPI) × 2.54. Inches = pixels ÷ DPI. This tool computes those automatically when you switch units.
Will resizing reduce quality?
Downscaling usually maintains clarity. Excessive upscaling can soften details. Use WEBP or high‑quality JPG for best results.
Can I change formats without resizing?
Yes. Leave dimensions as original and select a new format to convert.