100% local
Everything is processed in your browser. Images are not uploaded.
Image Compressor
Compress image files online for free
Reduce image file size while keeping clear quality for websites, sharing, and storage.
Single image supportAdjustable compressionPreview compression resultBrowser local processing
Drop an image here
or
Image compression currently supports JPG/JPEG only. Please convert PNG, WebP, or other formats to JPG/JPEG before compressing.
Maximum file size: 50MB
Images are processed locally in your browser and are never uploaded to a server
Safe and private
Your image stays on your device for better privacy.
Free to use
No registration required. Open the page and start using it.
Multi-platform
Works on Windows, Mac, iPhone, Android, and more.
How to compress an image
Upload an image
Choose a JPG or JPEG image from your device.
Choose compression
Adjust the level to balance file size and quality.
Preview the result
Compare the original and compressed image before downloading.
Download the image
Save the compressed image to your device.
Why choose FastToolAI Image Compressor?
- Simple workflow: upload an image and start compressing quickly.
- Fast browser-local processing without waiting for an upload.
- Adjustable levels help balance quality and file size.
- Images stay in your browser and are not uploaded.
- Image compression currently supports JPG/JPEG only. Please convert PNG, WebP, or other formats to JPG/JPEG before compressing.
Common image compression use cases
- Website optimization: reduce image weight and improve loading speed.
- Social sharing: meet platform size limits and share faster.
- Storage savings: reduce local and cloud space usage.
- Email attachments: make images easier to send.
- Mobile devices: reduce image storage and data usage.
Related image tools
Resize image
Adjust image dimensions and resolution.
Crop image
Crop an image to the exact area you need.
Rotate image
Rotate an image to the correct orientation.
Add watermark
Add text or image watermarks.
Image to PDF
Convert JPG, PNG, and WebP images to PDF.
WebP to PNG
Convert WebP images to PNG format.
Frequently asked questions
Will compression reduce image quality?⌄
Higher compression can reduce clarity. Adjust the level and preview the result before downloading.
Which image formats are supported?⌄
Image compression currently supports JPG/JPEG only. Please convert PNG, WebP, or other formats to JPG/JPEG before compressing.
Can a compressed image be restored to its original size?⌄
Compression may discard image data, so keep the original file if you may need it later.
Can compressed images keep transparency?⌄
JPG and JPEG do not support transparency. Convert transparent images to JPG/JPEG before using this compressor.
Can I compress multiple images at once?⌄
V1 supports one image at a time. Batch compression is planned for a later version.
Why did the image size change only slightly?⌄
Some images are already optimized or contain content that does not compress much further.
Can I use this tool on a phone?⌄
Yes. The page is designed for modern mobile and desktop browsers.
Are my images stored on a server?⌄
No. Suitable image processing is designed to run locally in your browser.