Image Resizer
Change the size of your images in pixels or percent, in bulk.
Drop in your JPG, PNG, WebP, GIF, BMP or AVIF images and resize them all in one go. Set an exact width and height in pixels or scale by percentage, keep the proportions so nothing gets stretched, and choose whether to keep the original format or switch to JPG, PNG or WebP. Add up to 50 files at once, download them one by one or as a ZIP. Everything runs in your browser, so nothing is uploaded. Free, with no sign-up and no watermark.
No Hidden Fees Ever
Keep Proportions
Files Stay in Your Browser
Up to 50 Files at Once
Drop images here or browse
JPG, PNG, WEBP, GIF, BMP and AVIF images, up to 50 files, 100 MB each. You can also paste with Ctrl+V.
Leave one side empty to scale automatically. With proportions kept, each image fits inside the width × height box.
Keep the original format, or switch while you resize.
Applies to JPG and WEBP output. Lower quality makes smaller files. 85–92% looks identical for most photos.
JPG can’t store transparency, so transparent areas are filled with this colour.
Private by design: your images are processed in your browser and never uploaded. Protected by Cloudflare Turnstile.
Why Resize Images?
To resize an image, set a new width and height in pixels (or a percentage of the original) and keep the proportions locked so it doesn't stretch. Teasoft's Image Resizer does this in your browser for up to 50 images at once: add your files, choose By pixels or By percent, click Resize images and download the results.
Photos from phones and cameras are often 4000 pixels wide or more, which is far bigger than most screens, web pages, documents or forms need. Resizing changes the pixel dimensions of the image. That makes it fit a layout or upload requirement, and it usually makes the file much smaller too, because there are fewer pixels to store.
There are two ways to set the new size, and this tool gives you both:
1. By pixels. Enter a width, a height, or both. Leave one side empty and the other is worked out automatically, so a 4000 × 3000 photo set to 1200 wide becomes 1200 × 900.
2. By percent. Scale everything by the same amount, for example 50% to halve the width and height of every image in the batch.
Common reasons to resize images:
- A website, blog or online store needs images of a specific width.
- A form, portal or template asks for images within certain dimensions.
- Photos are too large to email, share or paste into a document.
- You want a smaller copy of a big photo without opening an editor.
- You are preparing images for social posts, slides or newsletters.
- You have a whole folder of photos to bring down to the same size.
What each setting does:
| Setting | What it does | When to use it |
|---|---|---|
| By pixels | Sets the new width and/or height in px. Leave one side empty to scale automatically. | When you need a specific size, such as 1200 px wide. |
| By percent | Scales every image by the same percentage. | When you want “half size” for a whole folder, whatever the original sizes. |
| Keep proportions | Keeps the original shape, so the image isn’t stretched. Each image fits inside the width × height box. On by default. | Almost always. |
| Don’t enlarge smaller images | Keeps images that are already smaller than the new size at their original size. On by default. | Mixed folders, where you only want to bring big images down. |
| Save as | Keeps the original format, or switches to JPG, PNG or WebP. With “Same as original”, GIF files are saved as PNG and BMP files as JPG. | When you also need a different format. |
| Quality | Controls JPG and WebP output. Default is 92%. | Lower it for smaller files, keep 85–92% for photos that must look sharp. |
| Background | Fills transparent areas when saving as JPG. | Only when saving a transparent image as JPG. |
Good to know
- Resizing doesn't crop. The whole image is kept and scaled. With proportions kept, it fits inside your width × height box, so the result can be smaller than the box on one side. If you need an exact shape (for example a square from a landscape photo), crop it first in an editor.
- Enlarging doesn't add detail. Making an image bigger just stretches the pixels, so it looks softer. Resize down whenever you can, and keep "Don't enlarge smaller images" ticked (it is on by default) to protect small files.
- Resizing is not the same as compressing. Fewer pixels usually give a smaller file, but you can't target an exact size in KB. For that, resize first, then use a compressor.
- Keep your originals. Once an image is reduced, the lost pixels can't be recovered.
What You Can Do With This Resizer
- Resize by pixels or percentage. Exact width and height, or the same percentage for every image.
- Keep proportions. Images are scaled evenly so they don't look stretched or squashed.
- Auto-calculate one side. Fill in only the width or only the height and the other is worked out for you.
- Protect small images. "Don't enlarge smaller images" is on by default, so only large files are reduced.
- Switch format while you resize. Keep the original format, or save as JPG, PNG or WebP.
- Control quality. For JPG and WebP output, the slider starts at 92%. Lower values make smaller files.
- Resize in bulk. Add up to 50 files at once, each up to 100 MB, and download them all as one ZIP.
- Private by design. Files are processed in your browser and never uploaded to a server, which matters for personal photos, IDs and client work.
- Add files your way. Drag and drop, browse, or paste with Ctrl+V.
- No sign-up, no watermark, no fees.
- Works on any device. Windows, Mac, Linux, Android and iPhone, in any modern browser.
Which Image Tool Should I Use?
Use the Image Resizer when you need to change an image's pixel dimensions. If your main goal is a smaller file size, use a compressor, or resize first and then compress. If you need a different format, use a converter. For enlarging logos and icons sharply, convert from SVG instead.
How to Resize Images (3 Steps)
Add your images
Drag and drop your files, click browse, or press Ctrl+V to paste. You can add up to 50 JPG, PNG, WebP, GIF, BMP or AVIF files, each up to 100 MB.
Set the new size
Open Settings. Choose By pixels and enter a width, a height or both, or choose By percent and enter a percentage. Keep "Keep proportions" ticked so nothing is stretched. "Don't enlarge smaller images" is on by default, so images that are already small aren't stretched.
Resize and download
Click Resize images, check the results, then save each file or use Download to get everything in one ZIP.
Tip: to resize to a single width, such as 1200 px, type 1200 in the width box and leave the height empty. Every image will be scaled to that width with its own proportions.
Which Size Should I Choose?
| Goal | Suggested setting |
|---|---|
| Blog post or article image | Width 1200–1600 px, leave height empty |
| Full-width website banner | Width 1920 px, leave height empty |
| Product photos for an online store | Width 1200–2000 px, leave height empty |
| Email attachments and newsletters | Width 1200–1600 px (or 600–800 px for in-email images) |
| Social media posts | Width 1080 px, leave height empty (check the platform’s current guidance) |
| Small thumbnails and cards | Width 400–800 px |
| Half-size copies of a folder of photos | By percent: 50% |
| Quarter-size copies | By percent: 25% |
These are starting points, not guarantees. Platforms and templates change their requirements, so check the one you are using if exact dimensions matter.
Pixels or percent?
| Choose | When |
|---|---|
| By pixels | A site, form or layout asks for a specific width or height. |
| By percent | You want everything smaller by the same amount, and the original sizes differ. |
Resizing and file size: halving the width and height of an image leaves about a quarter of the pixels, so the file is usually much smaller, though not exactly a quarter. For a precise size limit (for example 200 KB), resize first, then compress with the JPG Compressor or Image Compressor.
Tips for resizing images
- Keep the original files until you've checked the resized versions.
- Resize from the original each time, not from an already resized copy.
- Resize down rather than up. Enlarging makes images look soft.
- To keep photos sharp, leave the format alone (Same as original) and keep quality at 85–92% if you save as JPG or WebP.
- If you save as JPG, choose a background colour for any transparent areas.
- Need a perfect square or an exact shape? Crop the image first, then resize.
Frequently Asked Questions
How do I resize an image?
Open Teasoft's Image Resizer, add your images, choose By pixels or By percent, enter the new size, click Resize images and download the results individually or as a ZIP.
How do I resize an image to a specific width or height?
Choose By pixels, type the width (or the height) you need and leave the other box empty. With proportions kept, the other side is calculated automatically and the image isn't stretched.
How do I resize an image by percentage?
Choose By percent and enter a value. For example, 50% halves the width and height of every image. This is handy for a batch of photos with different original sizes.
Does resizing reduce quality?
Making an image smaller keeps it looking sharp at its new size, though some fine detail is lost because there are fewer pixels. Making it larger makes it look soft, because the tool can't add detail that wasn't there. For JPG and WebP output, keep quality around 85–92%.
What does "Keep proportions" do?
It keeps the original shape of the image, so the width and height change by the same ratio and nothing looks stretched or squashed. With it on, each image fits inside the width × height box you enter.
Why is my resized image smaller than the width and height I entered?
With proportions kept, the image fits inside the box without being stretched, so one side matches your value and the other is smaller. If you need an exact shape, crop the image first, then resize.
Does the resizer crop images?
No. The whole image is kept and scaled. Crop it in an editor first if you need a different shape or want to remove parts of it.
What does "Don't enlarge smaller images" do?
It keeps any image that is already smaller than the new size at its original size, so only larger images are reduced. This stops small images from being stretched and turning blurry. It is on by default.
What is the difference between resizing and compressing?
Resizing changes the pixel dimensions of an image. Compressing keeps the dimensions and reduces the data used to store the image. Resizing usually makes a file smaller too. For a smaller file at the same dimensions, use Teasoft's Image Compressor.
How do I make an image smaller in KB?
Resize it to the width you actually need, which gives the biggest saving, then compress it with the JPG Compressor or Image Compressor, lowering the quality a little at a time until it fits your limit.
Can I resize several images at once?
Yes. Add up to 50 files, set one size or percentage, and every image is resized in the same run. Download them all as one ZIP.
Which formats can I resize?
JPG, PNG, WebP, GIF, BMP and AVIF, up to 50 files per batch and 100 MB each. You can keep the original format or save as JPG, PNG or WebP. With "Same as original", GIF files are saved as PNG (animated GIFs become a still image) and BMP files as JPG.
What happens to transparent backgrounds?
They are kept when you save as PNG or WebP. JPG can't store transparency, so transparent areas are filled with the background colour you choose.
Are my files uploaded to a server?
No. Resizing happens in your browser, and your files are never uploaded.
Can I resize images on my phone?
Yes. The tool works in the browser on Android, iPhone, tablets and computers. You do not need to install an app.
Is the Image Resizer free?
Yes. It is free, with no sign-up, no watermark and no hidden fees.
About Teasoft's Image Resizer
Teasoft's Image Resizer is a free browser-based tool that changes the pixel size of your images. Add JPG, PNG, WebP, GIF, BMP or AVIF files, set a new size by pixels or percentage, keep the proportions, and download the results one by one or as a ZIP of up to 50 files. You can keep the original format or switch to JPG, PNG or WebP while you resize.
It is made for website owners, bloggers, online sellers, designers, students, office workers and everyday users who need images in the right dimensions for a site, a form, a document or a post.
Resizing runs locally in your browser. Your files are not sent to a server, so they stay on your device from the moment you add them until you download the resized images.