Image CompressionImage
Free Image Compressor - Intelligently reduce image size online while preserving quality. Supports JPG/PNG/WebP. Local processing. Try it now!
Drag image or click to upload
Supports JPG, PNG, WEBP, AVIF, GIF
Usage Guide
1. Upload Image
Click the upload area or drag and drop an image file onto the page. Supports common image formats including JPG, PNG, WebP, GIF, BMP, etc. After uploading, the comparison between the original and compressed images will be displayed immediately.
2. Adjust Compression Parameters
Click the 'Settings' button in the top right corner to adjust the following parameters:
3. Compare Compression Effect
After uploading an image, the page displays a comparison view of the original and compressed images:
4. Download Compressed Image
Once satisfied with the compression result, click the 'Download' button to save the compressed image. The filename will be automatically generated based on your selected naming mode. To select a different image, click the 'Re-select' button.
FAQ
Q: What compression quality should I set?
A: We recommend setting it between 70%-85%. This range significantly reduces file size while maintaining good visual quality. For web display, 70%-75% is sufficient; for printing or high-quality display, 80%-85% is recommended.
Q: What's the difference between JPG and WebP formats?
A: WebP is a modern image format developed by Google that can reduce file size by 25%-35% compared to JPG while maintaining the same visual quality. However, some older browsers (like IE) don't support WebP. JPG has the best compatibility and is suitable for scenarios requiring broad compatibility.
Q: Will compression lose image quality?
A: There will be some quality loss, which is characteristic of lossy compression. However, with reasonable quality settings (70%-85%), the difference is barely noticeable to the human eye. You can use the comparison feature to carefully examine the before and after effects before downloading.
Q: Why can't I zoom when the image is very large?
A: When the image's original width exceeds the display area, the system automatically scales the image to fit the display, and zoom functionality is disabled to ensure optimal display. You can still drag the image to view different areas.
Q: Does it support batch compression?
A: The current version does not support batch compression. For batch processing, we recommend using professional image processing software, or wait for our future version updates.
Q: Are the compressed images secure?
A: Completely secure. All compression processing is done locally in your browser. Nothing is uploaded to any server. Your image data always remains on your local device.
Use Cases
Web Usage
Preparing images for websites, blogs, and social media, requiring reduced file size while maintaining visual quality to improve page load speed.
- Compression quality: 70%-75%
- Output format: WebP (modern browsers) or JPG (compatibility priority)
- Target compression ratio: 60%-80%
Email Attachments
When sending images via email, file size needs to be controlled to comply with email system limits (typically 10-25MB).
- Compression quality: 65%-75%
- Output format: JPG
- Prioritize compressing large photos
Mobile Apps
Preparing image assets for mobile applications, requiring reduced app size and data consumption while maintaining clarity.
- Compression quality: 75%-85%
- Output format: WebP
- Consider using 2x/3x resolution
Archive Backup
When storing photos long-term, aiming to reduce storage space without excessive quality loss.
- Compression quality: 80%-90%
- Output format: JPG or WebP
- Keep original files for important photos
Compression Effect Reference
- High compression (50%-65%): File size reduced by 70%-85%, suitable for thumbnails and previews
- Standard compression (70%-80%): File size reduced by 50%-70%, suitable for web display
- Light compression (85%-95%): File size reduced by 20%-40%, suitable for high-quality display