Faster web pages
Lighter images help pages load faster and improve Core Web Vitals scores.
Free
Image Compressor
Reduce image file size while maintaining quality. Compress JPG, PNG and WebP in your browser, one image or a whole batch.
80%
Smaller fileBetter quality
The original format is preserved.
Images
Your images will appear here
Add images, set the quality and compress. You will see the saving for every file.
This image compressor shrinks JPG, PNG and WebP files right in your browser. Set a quality level, add as many images as you like and compress them all at once; each file shows its new size and how much you saved. Your images are not uploaded, and there is no sign up, limit or watermark.
Compression keeps the width and height of your image the same and only reduces how much data it takes. For the biggest savings, combine it with Resize Image to make large photos smaller in pixels, or switch to a more efficient format with the JPG to WebP converter. iPhone photos in HEIC need the HEIC to JPG converter first.
How to use Image Compressor
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1
Set the quality level
Drag the slider between 10% and 95%. The default is 80%, a good balance of size and quality for most photos.
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2
Add your images
Click Add images and select one or many JPG, PNG or WebP files. You can add more before you compress.
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3
Compress and download
Press Compress Images, check the saving on each file, then download them one by one or with Download All.
What you can make
Email attachments
Compress photos so a set of them fits under common attachment limits.
Upload size limits
Get under the maximum file size of forms, job portals and marketplaces.
Bulk compression
Compress a whole set of product or blog images with one setting.
Private by design
Compression runs on your device. Your images are never sent to a server.
Social media posts
Shrink heavy photos before posting so uploads finish quickly on mobile data.
Documents and slides
Smaller images keep Word, PDF and slide files from growing too large to share.
Storage clean-up
Reduce the size of photo archives on your laptop or cloud drive.
How to compress an image without losing visible quality
JPG and WebP use lossy compression: lowering the quality setting throws away detail your eye is unlikely to notice, and the file gets much smaller. This tool re-encodes each image at the quality you choose.
- 80 to 85% is a safe default for photos you will show on a website or send by email. Most people cannot tell the difference from the original.
- 60 to 75% gives much smaller files and still looks fine for thumbnails, previews and social posts.
- Below 50% shows visible blockiness, especially in skies, skin and gradients. Use it only when the file size matters more than looks.
If the compressed version would be larger than your original (this happens with files that are already heavily compressed), the tool keeps your original file instead, so you never end up with a bigger image. The result for each file shows the percentage saved.
A good way to find your ideal setting is to compress one typical image at 80%, open it next to the original at full size and look closely at fine textures, faces and gradients. If you cannot see a difference, try 70% on the same image. Once you know the lowest setting you are happy with, use it for the whole batch.
Remember that compression is not a one-time fix you can repeat for free. Every time a JPG is compressed again, it loses a bit more detail. Keep your original files, and compress from the originals rather than compressing compressed copies.
JPG, PNG and WebP: what to expect
The tool keeps the original format, and results differ by type:
- JPG: the best candidate. Photos straight from a camera or phone often shrink by half or more at 80%.
- WebP: already efficient, but quality-based compression still helps with large files.
- PNG: lossless, so a quality setting has limited effect. The tool tries to make the file smaller, and if it cannot, your original PNG is returned unchanged. For big savings on photo-like PNGs, convert them with PNG to JPG or, to keep transparency, PNG to WebP.
Compression does not change dimensions. A 4000 by 3000 pixel photo stays that size. If you only need it at 1200 pixels wide for a blog, resizing first with the image resizer will cut the file size far more than compression alone.
What counts as a good file size? For most websites, a full-width photo of 100 to 300 KB loads quickly on phones. Thumbnails and small images can be well under 100 KB. For email, keeping each photo under 1 MB makes a set of pictures easy to send. Upload forms usually state their own limit, often 2 MB or 5 MB.
Why compress images in your browser
Everything happens on your own device using the browser canvas. Nothing is uploaded, so there is no wait for uploads and downloads, no file size cap set by a server and no queue. That also means very large batches depend on your device: a phone may slow down with dozens of 20 MB photos, while a laptop handles them easily.
Compressed files keep your original file name with _compressed added, so they will not overwrite your originals. Download All saves each file separately rather than as a ZIP, so your browser may ask once for permission to download multiple files.
Need other quick edits before publishing? Crop out empty space, rotate sideways photos, or stamp your images with the Watermark Maker.
The image compressor works in Chrome, Safari, Firefox and Edge, on desktop and mobile. On a phone, choose images from your photo library; iPhone photos stored as HEIC may need converting first, but iOS often hands the browser a JPG copy when you pick from the photo library.
Image Compressor FAQ
Still stuck? Contact us.
How do I compress an image?
Set the quality slider, click Add images, choose your files and press Compress Images. Each file then shows its new size and a download button.
Is this image compressor free?
Yes. It is free with no sign up, no watermark and no limit on the number of images.
Are my images uploaded to a server?
No. Compression runs entirely in your browser, so your images stay on your device.
What quality setting should I use?
Start at 80%. Go down to 60 to 70% for thumbnails and social posts, and stay at 85% or higher for photos you care about.
Which formats can I compress?
JPG, PNG and WebP. The compressed file keeps the same format as the original.
Can I compress multiple images at once?
Yes. Select several files at once or add more in batches, then compress them all with the same quality setting.
Why did my PNG not get smaller?
Does compression change the image dimensions?
No. Width and height stay the same. Use Resize Image if you need fewer pixels.
How do I compress an image to 100 KB or 200 KB?
Lower the quality step by step and check the new size shown for the file. If it is still too big at 60%, resize the image to smaller dimensions first, then compress again.
Is there a file size limit?
There is no limit set by RegiAI because nothing is uploaded. Very large files are limited only by your device memory.
Does Download All create a ZIP file?
No. It downloads each compressed file separately, named with _compressed after the original name.
Can I compress HEIC photos from my iPhone?
Not directly. Convert them with the HEIC to JPG converter first, then compress the JPGs here.
Will compressing an image make it blurry?
Not at sensible settings. Around 70 to 85%, most photos look the same as the original. Very low settings add blocky artifacts rather than blur.
Can I compress images on my phone?
Yes. The compressor works in mobile browsers on iPhone and Android, and compression runs on your phone without uploading.
What is the difference between compressing and resizing?
Compressing keeps the same pixel dimensions and stores them more efficiently. Resizing reduces the number of pixels. Combining both gives the smallest files.