8 Free Ways to Resize Pictures Online

In the digital age, most prefer visual over static and text-based information. That’s why the importance of using high-quality images that fit right on your website and social media is higher than ever. This is where image resizers come in handy. Many websites let you resize pictures online for free. However, most free online resizers have ads and might reduce the image quality.

This article highlights the nine free tools you can use to resize images easily. These tools can optimize pictures for blog posts, social media, and more. Some of them offer additional editing features that let you further optimize the output and increase engagement on social media and your website.

Part 1. Key Concepts of Image Resizing

Image resizing is the process of changing an image's dimensions by either adding or removing pixels. Here are a few basic terms you might come across when resizing a photo online:

Pixels

These are small dots that together form the whole picture. When resizing, you add or remove pixels, which affects the image’s dimensions and size.

Resolution

It refers to the level of detail in an image, determined by the number of pixels.Resizing an image online can increase or decrease the number of pixels, which affects the resolution and overall image quality.

Units

When you resize an image online, many tools let you specify the dimensions in either units or centimeters (cm) or millimeters (mm). Check the platform's image upload requirements and set the unit accordingly.

Image File Size

Typical image file size measurement units are kilobytes (KB) and megabytes (MB). The greater the dimension of an image, the higher the resolution, and so is the image file size.

Aspect Ratio

It is the proportional relationship between height and width of an image. Maintaining an aspect ratio during resizing avoids distortion and keeps the image intact.

Part 2. Types of Image Resizing

Image resizing typically involves increasing (upscaling) or decreasing (downscaling) the image’s dimensions. Here are some ways you can perform an image file resize online:

Upscaling

It’s the process of adding pixels to an image. Upscaling maintains the integrity of an image and often makes it appear sharper and more detailed.

Downscaling

This image resizing type involves removing some pixels from an image. This is often done when the original image is too large for specific usage, or you need a reduced amount of data for processing or storage.

Cropping

It removes certain parts of the image while keeping the remaining part in its original size. The primary objective here is to remove the distracting elements of an image and enhance its visual balance and focus.

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Part 3. 8 Free Online Tools to Resize Pictures

Resizing doesn’t take long if you have the right tool. There are plenty of free online file resizer tools available that make your photos look better. However, the following are the best free online picture resize tools available:

1. PicResize

PicResize is another online photo resizer that lets you customize your image as per your platform’s needs. It uses a drag-and-drop system and provides complete control over the edits. You can resize the image by reducing its size without losing its quality. Other than resizing, you can crop, flip, rotate, and convert the file with a few clicks.

Key Features

• Change the size of their images, either enlarging or shrinking them.
• Rotate the images to the desired orientation.
• Reduce the file size of the image while maintaining quality.
• Crop or resize multiple files simultaneously.

Step by Step Guide

Follow the steps to resize an image without losing quality online using PicResize:

Step 1: The homepage of PicResize is its editing dashboard, where you can select pictures from your computer, a URL, or simply drag and drop them. Upload the image and tap “Continue to Edit Picture.”

Step 2: In the new window, scroll down to select your new image size (25%, 50%, or larger) and adjust its height and width accordingly. You can also choose from special effects like badge, Polaroid, and more.

Step 3: Once you’re done with the edits, select the image file format and tap “I’m Done, Resize my Picture.” The resized image will be saved in your local storage.

Pros & Cons

2. Fotor

Fotor is a photo editing tool that provides a straightforward and flexible way to “resize multiple images online.” As with the top recommendations, there will be no change in the quality of the output. It's fast, simple, and avoids cropping to preserve the image's essential details. Besides, Fotor is recognized for its AI image generation capabilities, image enhancement features, and editing tools, such as denoise, dehaze, and adding text, among others.

Key Features

• Specify pixel dimensions, aspect ratio, or percentages to resize the image.
• Batch resize up to 50 images.
• Automatically enhance photos, improve colors, and more.
• Photo enhancer and remove background.

Step by Step Guide

Fotor doesn’t offer a design as straightforward as PicResize, but resizing pictures is simple. Follow the steps to resize your image using Fotor:

Step 1: Access the Fotor webpage on your desktop and tap “Sign Up” to create an account using Google, Facebook, Apple, or your Email ID.

Step 2: On the main dashboard, tap “AI Photo Editor” and then select “Open Image.” Once you upload the image, tap “Adjust” on the left sidebar menu.

Step 3: Navigate to the “Resize” option and type the proportions in the width and height fields. You can also click “Use Percentages” to resize the photo by percentage.

Step 4: Once the tool generates a resized image, tap the “Apply” button.

Pros & Cons

3. Canva

Canva is another popular photo editing tool with plenty of tools to help bring your imagination to the screen, regardless of your skill level. The interface is intuitive, and you can find handles on the sides and corners of the image to crop and resize to your liking. You can also input width and height manually, or choose from the preset dimensions.

You can add any number of media, elements, or text to a project and download it in popular formats, such as JPG, PNG, and PDF.

Key Features

• Create multiple versions of a design in different sizes.
• Enter specific dimensions for resizing.
• Vast library of pre-designed templates.
• Share designs and collaborate in real-time.

Step by Step Guide

Here’s how to file resize online on Canva easily and quickly:

Step 1: Open Canva.com in your browser and click “Upload” from the options listed under the search bar.

Step 2: In the new pop-up window, tap “Upload files,” select a file from your local storage, and then tap “Open.”

Step 3: Tap “Use in a new design > Custom Size.” Then, manually enter the height, width, and units, and tap “Create a new design.” Or, instead of manual input, you can select from preset options, such as Instagram posts, presentations, logos, and more.

Step 4: You’ll be directed to an editing page, where you can add elements and text, make collages, or draw anything as per your liking. Then, tap the “Share” option in the top-right corner, followed by “Download” to save the resized file to your local storage.

Pros & Cons

Pros

• User-friendly interface makes it easy to resize
• Access to stock media
• AI-powered tools available

Cons

• Restrictions for minimum and maximum allowed dimensions
• Editing tools are limited
• Free users have limited storage available

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4. Birme

Birme is another web-based, free resizer tool that can resize multiple images at once. Similar to typical resizing tools, it allows you to enter the width and height manually. However, here you can select “Auto Width” and “Auto Height” for the tool to perform automatic resizing. It has an option to add borders and watermarks. You can also compress the images into ZIP files for easy sharing.

Key Features

• Automatic and manual crop/resize options are available
• Support for JPEG and WEBP formats
• Compress the images to ZIP files
• Add a watermark and borders to images

Step by Step Guide

To resize a JPEG online, use Birme, and the following are the steps:

Step 1: On the Birme webpage, tap “Browse from your computer” to select and upload image(s) from your local storage. It also supports drag-and-drop functionality.

Step 2: Under the “Resize/Crop option,” manually enter the width, height, ratio, and focal point. Or, select “Auto width” and “Auto height” for the tool to analyze and resize the image(s) automatically. Then, tap Save Files to save the photos to your local storage.

Pros & Cons

5. Pixlr

Pixlr is a popular online tool, as it combines many editing features in one place. It lets you batch edit, generate images, animate, and more, powered by AI. Unlike Birme, Pixlr offers greater control over resizing. You can set the canvas size, aspect ratio, width, and height. Also, its smart resize feature offers preset dimensions suitable for several use cases.

Key Features

• A preview of the resize is available.
• It has tools to remove blemishes, red-eye, and other imperfections.
• AI-powered features like background removal, generative fill, etc.
• Smart resize with preset sizes.

Step by Step Guide

Pixlr, although it doesn’t offer a simple interface like Birme photoresizer online, here are the steps to follow:

Step 1: Access Pixlr on your browser, tap the “Sign up/Login” button, and use your Google, Facebook, Apple, or email ID to create an account. Pixlr also lets you perform one-time resizing and editing without creating an account.

Step 2: On the home dashboard, access “Open AI Photo Editor,” and upload an image by tapping on the “Open Image” option.

Step 3: Tap “Crop” on the side menu panel, then select “Image Size” to enter the width and height of the image manually. Or, tap “Smart Resize” and choose from preset dimensions. Then, tap Apply.

Step 4: You can see a preview of the resized image and access other tools from the menu bar to customize the image's appearance. Tap “Save” to upload it to your desired platform.

Pros & Cons

6. Picsart

Picsart is a flexible and powerful tool that is primarily popular among users due to its AI-backed editing features. These include AI image generation, background removal, free templates and images, and more. The interface is similar to Pixlr, and resizing an image can get tricky, especially if you aren’t used to such tools. However, the free resizer tool manages to maintain the quality despite the resize.

Key Features

• Advanced editing features, such as background and object removal.
• Batch resize the images.
• Video editing and animation tools.
• Large template library.

Step by Step Guide

Using Picsart to resize image(s) online requires you to follow the following steps in order:

Step 1: On Picsart’s home dashboard, tap “Upload” and select a picture from your local storage to resize.

Step 2: It takes you to its editing dashboard, where you navigate to the “Resize” option on the quick access panel. Here, you can input a custom dimension or choose from preset options, such as Instagram Story, YouTube thumbnail, Facebook profile, and more.

Step 3: You can remove the image background, add effects, adjust brightness and contrast, or AI enhance, to further customize the image. Then, tap “Export” to save the file.

Pros & Cons

7. Instasize

The simple online free resizer tool is a viable option if photo editing tools like Picsart, Fotor, and Pixlr seem a bit confusing or tricky to use. You only need to upload the photo, and the AI will analyze and resize the image for you. It selects the dimensions depending on the use case. You can optimize the image for various platforms, such as Instagram, Shopify, TikTok, and more.

Key Features

• The resizing feature allows users to resize photos for multiple platforms easily.
• Offers a variety of filters, presets, and editing tools.
• AI-powered tools like background and object removal.
• Image Upscaler can improve the quality of photos.

Step by Step Guide

Here is a step-by-step guide to using Instasize to resize the images:

Step 1: On the Instasize homepage, tap “Click to Upload” to upload an image or drag and drop an image to edit. It takes a few seconds to upload the image.

Step 2: Select from various preset dimensions, such as Instagram stories, reels, portrait, Facebook profile picture, cover photo, and more. Then, tap “Download.”

Pros & Cons

8. ILoveIMG

Another tool that lets you resize multiple images online for free is iLoveIMG. This online tool doesn’t require signing up, and you can obtain resized images with a few clicks.

Its By Pixels feature, or a checkbox that says “Do Not Enlarge if Smaller,” is pretty handy. Imagine you need to resize your photos to 800 pixels wide. If some of your photos are 700 pixels wide, it won’t scale them up. This prevents the images from becoming blurry or pixelated, resulting in a high-quality output.

Key Features

• Batch resize your JPG, PNG, SVG, and GIF images.
• Compress images while maintaining quality.
• Convert to JPG.
• Editor tools to add text, effects, frames, or stickers.

Step by Step Guide

I Love IMG, a bulk image resizer online, offers a simple way to resize your images. The steps are as follows:

Step 1: On the I Love IMG dashboard, tap “Resize Image.” This will redirect you to a new window, where you can tap “Select Images.”

Step 2: As you upload images from your local storage, select “By pixels” or “By percentage” and enter the resizing values. Tap the “Do not enlarge if smaller” checkbox to maintain image quality.

Step 3: Then, tap the “Resize Images” tab at the bottom right corner. It takes a few seconds to a few minutes (depending on the file size) to resize the images. Once done, save the photos and share them on your desired platforms.

Pros & Cons

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Part 4. Efficient Choice: How to Resize Images at Lossless Quality

UniConverter

Irrespective of where your content goes online, Wondershare UniConverter can be your go-to solution to ensure it’s well-optimized. The platform has enough tools to help you craft top-notch images suitable for any platform. Its image resizer lets you manually adjust the photo dimensions without compromising quality. You can batch resize images here, if needed.

It allows you to adjust brightness, color profiles, and tone during conversion. Also, you can add a background and a watermark. These features, paired with an intuitive interface, make it ideal for both beginners and pros.

Key Features

• AI-powered features like image enhancer, edits, and more.
• Supports batch resizing, cropping, and conversion.
• Equipped with effects, watermarks, and background.
• Additional features include an image enhancer, video editing, downloading, and burning media files.

Most resizing tools offer a convenient way to resize images, along with additional features. Wondershare UniConverter features, such as an AI image enhancer and image denoiser, help improve output quality. So, here are a few tips to use them and obtain better results:

• Maintain the Aspect Ratio: When resizing the image on UniConverter or any other platform, always keep the original aspect ratio. This prevents a distortion and ensures the image maintains the intended proportions.
• Image Converter: It lets you batch convert images into a format the platform supports. This way, you don’t need to search for another tool to ensure format compatibility after resizing.
• Image Editing: You can use tools like add effects, auto-enhancer, background remover, and more to obtain clear and high-quality images. Also, there are AI-based tools like auto-reframing, image enhancer, and image denoiser, among others, that can automatically increase the appeal of images.
• Utilize its High-Speed Conversion Feature: Turning this feature on enables GPU acceleration for faster conversion. You can now use it to perform editing and conversion actions within seconds.

Follow the steps to resize an online image for free using Wondershare UniConverter:

Step 1

Download and install the Wondershare UniConverter app from its official website. Once done, launch it to access its main dashboard. Tap “Login” and then “Create one here” to set up your UniConverter account. You can use your email ID and password, as well as Google, Facebook, or X (formerly Twitter), for that purpose. 

Step 2

Tap “Photo Editor” on its quick access panel and “Add Files” to upload the image to resize. You can drag and drop your file and upload multiple files to resize at once. 

Step 3

Under the “Adjust” panel, select “Resize.” Select from presets like Instagram Post or YouTube Thumbnail, or enter your custom width and height. Based on your needs, set the fit to “Stretch to Fit” or “Fit with Background.”

Step 4

You can also find the “Crop” option under the same panel. Select from the predefined aspect ratios, such as 16:9, or manually enter a custom width and height. Once the crop is applied, tap “Apply.”

Step 5

Access the AI Tools feature to apply the Background Remover or Image Enhancer and obtain a professional-grade image. Once you’re done with the edits, tap “Export All” to download the high-quality resized image(s).

Pros & Cons:

Part 5. Conclusion

Resizing is often overlooked when it comes to editing, but the right size and quality image is key in building a strong online presence. There are plenty of tools to resize pictures online for free, but most come with ads or limited features. The listed free online resizers can streamline the process while maintaining the quality. However, features like image enhancer, background editor, and bulk file conversion make Wondershare UniConverter a reliable online resizer. It also offers capabilities such as video editing, AI image generation, video enhancement, and more. So, try it today for free!

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