Resize Images Online
Resize one or multiple JPG, PNG and WebP images by width, height, exact dimensions, percentage or maximum side while keeping full control over aspect ratio and output settings.
Resize Images Online
Resize one or multiple JPG, PNG and WebP images, preserve aspect ratio, choose output format and quality, and download the results individually or in a ZIP.
Select Images
or drag & drop JPG, PNG, WebP images here
Images resized successfully
Your resized images are ready to download.
This tool works inside the browser. Your images are not uploaded to any server.
What Is the Image Resizer Tool?
The Image Resizer is a browser based utility that lets you change the width and height of JPG, PNG and WebP images. You can resize one image or process several images together using the same settings.
The tool supports setting a specific width, setting a specific height, entering exact dimensions, resizing by percentage and limiting the longest side of an image.
You can preserve the original aspect ratio, choose the output format, control JPG or WebP quality and download all processed images in a ZIP file. This utility is available as part of the PDF Mentor collection of image features and free PDF tool options.
Why Resize an Image?
Large images can be difficult to upload, share, store or use on a website. Resizing can reduce dimensions and make files easier to manage.
- Prepare photographs for a website
- Reduce image dimensions for email
- Meet upload size requirements
- Create product listing images
- Prepare graphics for PDF documents
- Make social media images
- Reduce storage use
- Create consistent image dimensions
- Prepare images for online forms
- Improve page loading performance
How to Use This Tool
Upload one or more images and select a resizing method. Enter the required width, height, percentage or maximum side value.
Choose whether the aspect ratio should remain unchanged. Then select the output format, quality, background option and ZIP file name. The tool shows the expected dimensions for every uploaded image before processing.
Step by Step Instructions
Step 1: Upload Your Images
Click Select Images and choose one or more files from your device. You can also drag and drop JPG, PNG or WebP images into the upload area.
Step 2: Choose a Resize Mode
Select Set Width, Set Height, Exact Width and Height, Resize by Percentage or Max Side.
Step 3: Enter the Dimensions
Enter the required width or height in pixels. For percentage resizing, enter a value such as 50 to reduce dimensions by half.
Step 4: Choose the Aspect Ratio Setting
Select Yes to keep natural proportions or No when exact dimensions are more important than the original shape.
Step 5: Select the Output Format
Choose Auto, JPG, PNG or WebP.
Step 6: Choose the Quality
Select Small Size, Recommended or High Quality for JPG and WebP output.
Step 7: Choose the Background
Select White for JPG when transparent areas are present, or Keep Transparent for PNG and WebP.
Step 8: Set the ZIP File Name
Enter the name you want to use for the ZIP file containing all resized images.
Step 9: Resize and Download
Click Resize Images, then download images individually or use Download ZIP to save the full batch.
Tool Settings Explained
| Setting | What It Does | Best Use |
|---|---|---|
| Set Width | Changes width to the entered value and can calculate height automatically. | Useful for websites and blog images. |
| Set Height | Changes height and can calculate width automatically. | Useful when vertical dimension is fixed. |
| Exact Width and Height | Uses both dimensions. With aspect ratio on, the image fits inside them. | Useful for standardized image boxes. |
| Resize by Percentage | Scales both dimensions by a percentage. | Useful for quick proportional scaling. |
| Max Side | Limits the longest edge without enlarging smaller images. | Useful for mixed batches. |
| Keep Aspect Ratio | Prevents unwanted stretching. | Recommended for photos, logos and product images. |
| Output Format | Selects Auto, JPG, PNG or WebP. | JPG for photos, PNG for transparency, WebP for websites. |
| JPG and WebP Quality | Controls compression level. | Recommended suits most everyday uses. |
Real Before and After Example
A blogger has eight photographs measuring 4000 by 3000 pixels. Each image is too large for a blog article and may slow down page loading.
The blogger selects Set Width, enters 1600 pixels, keeps the aspect ratio and chooses WebP. Each image becomes 1600 by 1200 pixels and is easier to upload and use online.
Who Should Use This Tool?
The Image Resizer is useful for website owners, bloggers, graphic designers, online sellers, photographers, students, teachers, office teams, social media managers and users preparing images for PDF documents.
Privacy and File Security
The resizing process takes place directly inside your browser. Your images are not uploaded to an external server during normal use.
The original files remain unchanged. The tool creates new resized copies for download.
Limitations and Troubleshooting
Very large images or large batches may require significant browser memory. Animated GIF files are not fully supported and only the first frame is resized.
- Use JPG, PNG or WebP if another format fails.
- Reduce the number of uploaded images in a large batch.
- Refresh the page if processing stops.
- Use a current version of Chrome, Edge, Firefox or Safari.
- Some HEIC, RAW, SVG or uncommon formats may not open correctly.
Frequently Asked Questions
Is the Image Resizer free?
Yes. You can resize images without creating an account or installing software.
Can I resize multiple images together?
Yes. The tool supports multiple image uploads and ZIP downloads.
Can I resize an image without stretching it?
Yes. Set Keep Aspect Ratio to Yes.
Can I enter exact dimensions?
Yes. Select Exact Width and Height.
Can I resize by percentage?
Yes. Select Resize by Percentage and enter a value.
Can I preserve transparency?
Yes. Use PNG or WebP and choose Keep Transparent.
Does resizing reduce file size?
It often does when dimensions are reduced. Final size also depends on format, quality and image content.
Is this part of a free PDF tool website?
Yes. PDF Mentor provides the Image Resizer alongside its free PDF tool and image utility collection.
Conclusion
The Image Resizer is a practical browser based tool for changing the dimensions of JPG, PNG and WebP images.
It supports width, height, exact size, percentage and maximum side resizing. It also provides aspect ratio controls, output format selection, quality settings, transparency support, individual downloads and ZIP downloads.
As part of the PDF Mentor free PDF tool collection, it helps users prepare images for websites, online stores, social media, forms, presentations and PDF documents without installing additional software.
Resize your images now
Choose your dimensions, format and quality, then download each file or the full ZIP.