Output Format
WEBP usually gives the smallest web-friendly file. JPG is good for photos. PNG is best for transparent graphics, but often larger.
Private browser image tool
Free Image Compressor
Compress, resize, and convert JPG, PNG, and WEBP images locally in your browser. Process batches and download everything as a ZIP.
How to Compress Images Online
1
Add images
Drag and drop JPG, PNG, or WEBP files, or choose them from your device.
2
Choose output settings
Select WEBP for modern small files, JPG for compatibility, or PNG when transparency matters.
3
Resize if needed
Set width or height. Keep aspect ratio locked to avoid stretched or squashed images.
4
Download results
Save individual files or download the whole batch as a ZIP.
What Each Setting Means
Quality Slider
Lower quality means smaller files. For most web images, 75% to 85% is a strong balance.
Width and Height
Use these to resize images before compression. Smaller dimensions usually reduce file size more than quality changes alone.
Target KB
For JPG and WEBP, enter a target file size and the tool will search for a quality level close to that limit.
Lock Aspect Ratio
Keep this enabled when resizing so the image stays proportional. Disable it only when you intentionally need exact width and height.
ZIP Download
After batch compression, download every completed output in one ZIP file for faster workflow.
Compress Images Without Uploading
StudioSEO Image Compressor works locally using browser canvas processing. Your images stay on your device, making it useful for blog images, thumbnails, ecommerce photos, social posts, and website assets that need smaller file sizes.
- Blog posts: reduce hero and inline images before publishing.
- YouTube thumbnails: compress downloaded preview images before uploading to a website.
- Online stores: keep product photos lighter while preserving enough visual quality.
- Forms and documents: hit upload limits by setting a target KB.
Related Image Tools
Image Compressor FAQ
Are my images uploaded to your server?
No. Compression, resizing, and conversion happen locally in your browser.
Which format gives the smallest file?
WEBP is usually the best choice for small web images. JPG is widely compatible, and PNG is best when transparency is required.
Why is PNG quality disabled?
PNG uses lossless compression in browser export, so the quality slider does not work the same way it does for JPG and WEBP.
What does target KB do?
It tries multiple quality values for JPG or WEBP and keeps the best result near your requested file size.