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चरण-दर-चरण इमेज का आकार कैसे बदलें

By FreeOnlineTools Team · Updated 2026-09-02

Quick Answer

इमेज resize करने के लिए: Image Resizer खोलें, इमेज अपलोड करें, लक्ष्य चौड़ाई या ऊँचाई दर्ज करें (दूसरा आयाम aspect ratio बचाने के लिए स्वतः गणन होता है) और डाउनलोड करें। सारा प्रोसेसिंग Canvas API से स्थानीय है।

Introduction

इमेज resize करना उसके आयाम (चौड़ाई और ऊँचाई pixels में) बदलता है। यह वेब इमेज (layout और performance के लिए विशिष्ट आयाम), social media post (प्रति प्लेटफॉर्म सटीक आकार) और thumbnail के लिए आवश्यक है। Resize, compress से अलग है —resize आयाम बदलता है, compress फ़ाइल आकार घटाता है।

Step by Step

  1. Open the Image Resizer tool

    Go to the Image Resizer tool page. The tool supports JPEG, PNG, WebP, and BMP and processes images locally using the Canvas API.

  2. Upload your image

    Click upload or drag-and-drop your image onto the tool. The tool displays the original dimensions (e.g., 4000x3000 pixels) and file size.

  3. Enter the target dimensions

    Enter the new width or height. If 'Maintain aspect ratio' is enabled (default), the other dimension auto-calculates to prevent distortion. For example, changing width from 4000 to 800 auto-sets height from 3000 to 600.

  4. Choose the resampling method (optional)

    Some tools offer resampling options: bilinear (fast, lower quality) or bicubic (slower, higher quality). For downscaling, bicubic produces sharper results. The browser's drawImage() default is usually sufficient.

  5. Download the resized image

    Click Download to save the resized image. The tool shows the new dimensions and file size. Verify the result looks correct before using it.

Examples

Resize for web display

Input: photo.jpg (4000x3000, 4.5 MB)

Output: photo-web.jpg (800x600, 180 KB) — 96% size reduction

Resize for social media thumbnail

Input: image.png (2000x2000)

Output: thumb.png (300x300) — square thumbnail

Resize without aspect ratio (distortion)

Input: photo.jpg (4000x3000, maintain ratio: off)

Output: photo.jpg (800x800) — stretched/distorted

Common Problems

  • Distortion from breaking aspect ratio —disabling 'maintain aspect ratio' stretches the image. Always keep it on unless you intentionally want distortion.
  • Upscaling produces blurry images —enlarging an image beyond its original size creates blurry, pixelated results. Use AI upscaling for better quality.
  • Resizing to wrong dimensions for the use case —check the target platform's requirements. For example, Open Graph images should be 1200x630, Twitter cards 1200x675.
  • Resizing without compression —a 4000px image resized to 800px but saved at 100% JPEG quality is still large. Combine resize with compression.

Tips

  • Resize images to the exact display dimensions —serving a 4000px image for an 800px display wastes bandwidth and slows page load.
  • Use common web dimensions: 1920x1080 (hero), 1200x630 (social), 800x600 (content), 300x300 (thumbnail).
  • Always maintain aspect ratio to avoid distortion —the exception is when you intentionally crop to a specific ratio.
  • Use our Image Resizer for instant, private processing —your images never leave your browser.

Related Tools

Related Guides

References