Caesium is simple open source image compressor. It compresses BMP, JPG and PNG formats. This tool is free to download. It can be used on Windows PC and you can upload compressed images on the web instantly. There are several ways you can optimize the images without compromising on its quality. One is to compress the image by using a good software such as Adobe Photoshop. Alternatively, there are also various free tools to help you do this without affecting the quality of your images.
Whether you’re designing a website, writing a blog post, or sharing your latest photography shotsOnline Photo Albums: Where to Host Them for FreeOnline Photo Albums: Where to Host Them for FreeWhich online photo storage service is the best? Between free price tags, unlimited storage space, and photo security, which service is best for you?Read More, sometimes you’ll find yourself with a handful of images that need to be processed en masse — and doing them one by one can end up being a huge waste of time.
There are plenty of batch image tools out there, but many of them require installation and most are limited to one particular operating system. In a lot of cases, it’s just faster and more convenient to use free online tools instead because they’re accessible from anywhere at any time.
So we’ve compiled a list of the best online tools for batch image processing and categorized them in three ways: resizing, optimizing, and converting. Bookmark the ones you find useful and start using them now!
Image Resizer Tools
Image resizers can be tricky, not only because of file size considerations, but also because resizing can affect the quality and clarity of images. In this sense, some resizers are objectively better than others, and that’s why the best ones are those that give you fine control over quality.
Bulk Resize Photos
Bulk Resize Photos has the easiest interface. Just drag your images onto the site — as many as you want — and you can scale in five ways: percentage, longest side, width, height, or exact size. Everything is client-side so it’s really fast and there’s no uploading necessary.
Or use the advanced settings to change formats between JPG and PNG, adjust image quality, set a background color, and even add padding to prevent stretching.
BIRME
BIRME, which stands for Batch Image Resizing Made Easy, is simple but flexible. Drag your images onto the page and set the new width and height. Depending on which resize option you select, it will scale or crop to fit your dimensions.
It can also add some border padding and alter quality settings (for JPGs). Resized imaged are downloaded as a single ZIP file.
Resize Pic Online
Here’s another drag-and-drop site that’s on par with the two above, only a little more restrictive. Upload your images, select a width between 30px and 1500px, a quality between Low, Medium, High, and Best, and then choose whether you want to convert to JPG, PNG, or keep the original format.
The restrictions: You can bulk resize up to 10 images at once, size should not be more than 15 MB per image, and neither width nor height can exceed 6000px on any image. The site is available in Russian and English too, in case that matters to you.
PicGhost [No Longer Available]
The nice thing about PicGhost is that you can upload your own files or import them directly from Facebook, Flickr, or Picasa.
The restrictions: Upload up to 40 images at once and size should not be more than 10 MB per image.
Google Search Tool For Website
Not only can you resize in a variety of ways, but you can also add watermarks and edit each image using an online editor called Aviary [No Longer Available]. I’d personally only use this tool for resizing though.
PicResize
PicResize is a batch resizing tool that we’ve mentioned beforeSpeed Through Your Image Editing Tasks With These 3 Great Batch Editing ToolsSpeed Through Your Image Editing Tasks With These 3 Great Batch Editing ToolsWhen it comes to resizing or converting images, it can often be a tedious task of doing one after the other. Luckily there are a lot of great tools out there that make it easy...Read More. It’s still useful and it gets the job done, but it’s a little behind when compared to the aforementioned resizers. Use it if the above tools aren’t available to you or you don’t like them for some reasons.
If you switch to the non-batch version of PicResize, you can also crop and add special effects to your images.
Image Optimizer Tools
Image optimizers have one primary focus: to reduce the file size of an image as much as possible while impacting the quality of that image as little as possible — all without resizing or cropping the image.
TinyPNG
TinyPNG is arguably the best image optimization tool on the web. Despite the name, it can compress both PNGs and JPGs, and there’s absolutely nothing you have to do other than upload the images (which uses a lovely drag-and-drop interface).
Once uploaded, TinyPNG automatically compresses using a lossy methodHow Does File Compression Work?How Does File Compression Work?How does file compression work? Learn the basics of file compression and the difference between lossy versus lossless compression.Read More that maintains the perfect balance between quality and file size reduction. Files can be downloaded individually, as a single ZIP file, or moved to your Dropbox account.
Optimizilla
Optimizilla is very similar to TinyPNG in that you just drag-and-drop PNGs and JPGs and it does most of the work for you. However, with this one, you can control the final quality of the images (between 1% and 100%) on a per-image basis.
The downside is that you can only process 20 images at a time. Files can be downloaded individually or as a single ZIP file.
Best Mac Image Optimizer Tool For Website Images
Kraken.io
Kraken is another drag-and-drop tool that’s a bit more restrictive than the above tools, but has one big advantage: you can choose whether to compress using a lossy or lossless method. Download resulting images individually or as a single ZIP file.
The restrictions: Up to 1 MB per image and a total of 50 MB per month. Or you can get a premium subscription to increase the file size limit to 32 MB, the monthly upload limit to gigabytes, and unlock extra features like resizing and Dropbox synchronization.
We’ve lauded the benefits of Kraken before3 Fast, Clean, & Efficient Online Image Optimizers To Shrink Your Images3 Fast, Clean, & Efficient Online Image Optimizers To Shrink Your ImagesAs a blogger and a normal guy who is running out of space on his hard drive, I am always on the lookout for a good image compression program. Thanks to the plethora of image...Read More, but unless you need the lossless compression, TinyPNG or Optimizilla may fare better for you.
Image Converter Tools
Different image formats have different pros and cons — check out our comparison of JPG, PNG, and GIFJPEG, GIF, or PNG? Image Filetypes Explained and TestedJPEG, GIF, or PNG? Image Filetypes Explained and TestedDo you know the differences between JPEGs, GIFs, PNGs, and other image filetypes? Do you know when you should use one instead of the other? Fear not, MakeUseOf explains everything!Read More — and often it makes more sense to prioritize one format over others. These tools come in handy when you want to switch a lot of images to a particular format.
Raw.Pics.io
Raw.Pics.io isn’t just a handy tool, but it’s beautifully designed too. It makes you want to use it, and that’s rare among online tools (which tend to be hastily thrown together).
Best Mac Image Optimize Tool For Website Images
As a photography-centric tool, Raw.Pics.io mainly supports RAW source files in the following formats: DNG, CR2, NEF, ARW, ORF, PEF, RAF, PDF, or JPG. Images can be exported as JPG, PNG, or WEBP. Only JPG source images can be resized.
CloudConvert
CloudConvert is an incredible tool for any kind of file conversion. You have to connect your cloud account (either Dropbox, Google Drive, OneDrive, or Box) and pick files that way. No uploads allowed. But it supports dozens of image inputs and outputs so it’s well worth it.
For free, you get 25 conversion minutes per day, which actually isn’t that bad. You also get 5 concurrent conversions, 1 GB max file size, and bumped down to low priority if there are lots of others using CloudConvert at the same time. For more freedom, you can upgrade to a premium subscription starting at $8 per month.
Did We Miss Any Tools?
Currency Converter Tool For Website
Even though image size and quality are important for websites and blogs, remember that image SEO is just as importantRank With Your Images: 4 Ways To Make Your Images SEO FriendlyRank With Your Images: 4 Ways To Make Your Images SEO FriendlyImage searches drive traffic to your website if you know what you're doing. The trick is to understand how SEO works and format your images accordingly. Here are a few basic tips.Read More for maximizing the amount of search engine traffic you capture. Don’t neglect that aspect.
Note that if you’re using one of these tools as a photographer and you have aspirations to be professional or semi-professional, we recommend learning to use something like Photoshop or Lightroom15 Free Alternatives to Adobe Lightroom, Illustrator, and Photoshop15 Free Alternatives to Adobe Lightroom, Illustrator, and PhotoshopWould you like to get Adobe Photoshop, Lightroom, or Illustrator for free? Here are some of the best Creative Cloud alternatives.Read More instead.
Best Free Image Optimizer
And don’t forget these photography practice exercises7 Skill-Building Photography Exercises That Really Work7 Skill-Building Photography Exercises That Really WorkThere are lots of exercises that can help 'develop your photographic eye'. Here are the most effective ones that we've found.Read More!
Photo Optimizer Tool
If we missed any other batch resizers, optimizers, or converters, please let us know in the comments below! Otherwise, tell us which ones are your favorite and what you used these tools for. We’d love to hear from you!
Explore more about: Image Editor, Photography.
Wall Preview Tool For Website
You can also check this very useful and easy to use Multi Tasking tool. You can Compress, Resize your images, http://www.ipiploo.com
You missed Sumo Paint: https://www.sumopaint.com/home/
That's a great one as well.