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How to Resize an Image

Learn how to resize an image, choose pixels or aspect ratio, export correctly, avoid distortion, troubleshoot quality, and read FAQs.

TechnologyEdited by Pramod Tiwari
2 min read

Quick Answer

To resize an image, open it in a trusted editor, choose Resize or Image Size, keep the aspect ratio locked, enter the new width or height, preview quality, and export a copy in the right format.

What You Need

  • Image file
  • Trusted image editor
  • Target size in pixels or dimensions
  • Original backup copy
  • Export format

Safety Precautions

  • Keep an original copy.
  • Lock aspect ratio to avoid stretching.
  • Avoid uploading private images to unknown tools.
  • Do not enlarge tiny images too much.
  • Check file size and format before sharing.

Step-by-Step Instructions

  1. Step 1

    Save a copy

    Duplicate the original image.

  2. Step 2

    Open editor

    Use a trusted photo or image app.

  3. Step 3

    Choose resize

    Find Resize, Image Size, or Export size.

  4. Step 4

    Lock aspect ratio

    Keep proportions linked.

  5. Step 5

    Enter size

    Type the target width or height.

  6. Step 6

    Preview quality

    Check sharpness and cropping before export.

  7. Step 7

    Export copy

    Save as JPG, PNG, or WebP based on use.

Practical Example

Example: You resize a product image to 1200 pixels wide, keep aspect ratio locked, and export a JPG copy for a website.

Common Mistakes

  • Stretching the image
  • Overwriting the original
  • Enlarging too much
  • Using wrong format
  • Ignoring file size
  • Uploading private photos to unknown tools

Troubleshooting

Image looks blurry

Start with a larger original and avoid heavy enlargement.

Image is stretched

Undo and lock aspect ratio before resizing.

File is too large

Export with compression or a web-friendly format.

Transparency disappeared

Use PNG or WebP instead of JPG.

FAQs

What does aspect ratio mean?

It is the proportional relationship between width and height.

Can resizing reduce file size?

Yes, smaller dimensions and compression usually reduce file size.

Why does my image look blurry?

It may have been enlarged beyond its original detail.

Which format should I use?

Use JPG for photos, PNG for transparency, and WebP for web use when supported.

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