Image Compressor
Compress one or many JPEG, PNG, and WebP images with quality and size controls.
Image Compressor
Compress one or many JPEG, PNG, and WebP images with quality and size controls.
About this image compressor
The image compressor reduces the file size of JPEG, PNG, and WebP images using quality and size controls, and it can process a batch at once. You compare the result against the original and download a single file or a ZIP of the whole set.
Smaller images load faster and slip under upload limits, but over-compression shows up as blur and blocky artefacts, so the preview matters. Compress with the destination in mind — a web page tolerates more compression than a print file — and keep your originals in case you need full quality later.
Common uses
- Compress images before uploading them to websites, forms, blogs, stores, documents, or email.
- Reduce JPEG, PNG, and WebP file sizes while comparing quality and final download size.
- Batch compress multiple images into a ZIP when a project or page has several assets.
Helpful tips
- Start with a moderate quality setting and lower it only if the file is still too large
- Preview important images for blur, artifacts, transparency, and color changes
- Keep original files when you may need print quality or future edits
How to use Image Compressor
- Upload the image you want to process with Image Compressor.
- Check the current dimensions, format, orientation, transparency, and file size before changing anything.
- Choose output settings based on the destination, such as web upload, email, social media, documentation, or archiving.
- Preview the result for visible quality, cropping, color changes, metadata, and final file size.
- Download the finished image and keep the original file until you confirm the exported version works where you need it.
Frequently asked questions
How do I compress an image online?
Upload one or more images, choose the output quality or size options, preview the result, then download the compressed image or ZIP file.
Which image formats can I compress?
The compressor supports common web image workflows including JPEG, PNG, and WebP where the browser can process the file.
Is Image Compressor free, and does it work on mobile?
Yes. Image Compressor is free to use on JustBloc with no account or installation, and the page is designed to work on desktop, tablet, and mobile browsers.