Tool + Guide for shop owners, students & creators

Online Image Resizer & Compressor – Free Tool and Practical Guide

Large images can slow down websites, cause upload errors and consume extra mobile data. This page by Volvo Computer Technology gives you a free tool to resize and compress JPG/PNG images, along with a clear guide on best practices for web, WhatsApp and online forms.

Resize & Compress Multiple Images (JPG / PNG)

Use this tool to reduce the dimensions and file size of your images. Upload one or more photos, select a maximum width/height and quality, and download all optimized images in a single ZIP file.

Privacy note: Uploaded images are processed on this server and temporary files are removed after the ZIP file is generated and downloaded. This page is meant for simple image optimization, not for long-term storage.

1. Image Resizing – Change Width & Height

Resizing means changing the pixel dimensions of an image, for example from 4000×3000 to 1200×900. This is useful when a photo is too large for a website banner or an online form.

When should you resize an image?

When a website or portal shows “image too large” during upload.
When a banner needs a specific width like 1200 px or 1920 px.
When you want a smaller, web-friendly version of a camera photo.

Typical sizes for daily use

Use case	Recommended size
WhatsApp profile / status	1080 × 1080 px (square)
Website banner / hero image	1600–1920 px width (height auto)
Product listing image	800 × 800 px or 1000 × 1000 px
Simple blog / article image	1200 × 675 px

Tip: For most websites, it is safe to keep the width between 800 px and 1600 px. Extremely large camera photos are not required.

2. Image Compression – Reduce File Size (KB / MB)

Compression reduces the file size of an image (for example from 4 MB to 400 KB) without changing the visible dimensions. This is important for faster loading and smoother uploads.

Quick Compression Tool (keep original size)

When should you compress an image?

When a website limit says “max 200 KB” or “max 500 KB”.
When you want your page to load quickly on slow internet.
When sending many photos over email or WhatsApp.

Suggested target sizes

Use case	Approx. size
Website product photo	100–250 KB
Blog / article image	120–300 KB
Simple logo (PNG)	Under 100 KB
Document photo for online form	50–200 KB (as per form requirement)

Note: Always keep an original copy of important images. You can compress and resize a duplicate version for upload and web use.

How to use this image resizer and compressor

The tools on this page are designed for everyday business users, students and content creators. You do not need any special design background – simply upload images, choose the limits, and download the optimized files.

Step-by-step: Resize and compress images on this page

Use the main tool to control both dimensions and quality, or the quick tool for compression only.
Select one or more JPG/PNG files from your device.
Choose a maximum width/height or tick “keep original size” for HD photos.
Set the JPEG quality between 40 and 100. Higher values give better quality.
Click the conversion button and download the ZIP file after processing.

Best practices for web image optimization

Always keep a backup of the original high-resolution image.
Use JPG for photos and PNG for logos or images with transparency.
Avoid extreme compression for screenshots with text; it can make the text blurry.
Test your pages on mobile networks to ensure they load quickly.

Frequently asked questions (FAQ)

What is the difference between resizing and compressing an image?

Resizing changes the pixel dimensions (width and height) of the image. Compression mainly reduces the file size (KB/MB) by controlling quality. For web and online use, we normally use both: resize to a reasonable resolution and then compress to a target size.

Will compressing images reduce the quality?

Light to moderate compression (for example quality 75–90) is often not noticeable on normal monitors and mobile screens. Very aggressive compression (quality below 50) can introduce visible artefacts, especially in areas with gradients or text.

Should I use JPG or PNG format?

For photographs, product images and backgrounds, JPG is usually better because it achieves smaller file sizes. For logos, icons and graphics with transparent backgrounds, PNG is recommended. This tool can handle both formats.

Why are my images still not uploading even after optimization?

Some portals and government websites have very strict dimension and size rules, such as exact width/height and a specific file size limit. Make sure your optimized images meet both criteria – use the correct pixel size and stay below the required KB limit.

Can I use the same file for printing and for web?

For printing, high-resolution images with large dimensions are ideal. For web, the same files are usually too heavy. It is better to maintain two versions: one for print and one optimized for online viewing and uploads.