Image Compressor - Reduce Image File Size
Re-encode JPEG, PNG, or GIF as a JPEG with adjustable quality. Compare file sizes and image detail before downloading. Processing stays in your browser.
Upload Image
💡 Compression Tips:
- Quality 80-90% offers best balance of size and quality
- Lower quality values reduce file size more but decrease image quality
- JPG format is used for best compression results
- All compression happens in your browser - images never uploaded
Practical guide
Prepare a photograph for a web page
Start with the original photograph and try a quality setting around 80. Compare fine details such as hair, text, and hard edges before deciding whether the smaller file is acceptable.
Worked example
Select a JPEG, PNG, or GIF under 10 MB. The tool re-encodes the browser-decoded image as JPEG and shows the actual byte sizes. If the result is larger than the original, keep the original or try a lower quality; compression is not guaranteed.
Check the result
The download has a .jpg extension. Check the saved image at its intended display size. Pixel dimensions are preserved, so this tool does not replace a resizer when a website requires a particular width or height.
Limitations to know
JPEG does not preserve transparency; transparent areas become white. Animated inputs become a still frame. Do not use this conversion for logos that need transparency or for preserving an original photograph’s metadata. Keep a backup of the source.
How to Use
Follow these simple steps for quick results
- 1Click the upload area and choose a JPEG, PNG, or GIF up to 10 MB
- 2Adjust the quality slider to control compression level
- 3Preview both original and compressed images side-by-side
- 4Review the file size reduction percentage
- 5Download the compressed image to your device
Key Features
📉 Compare original and JPEG output sizes
🎚️ Adjustable quality slider (1-100%)
👀 Live preview before and after
📊 Real-time compression statistics
📥 One-click download
🔒 100% browser-based - no uploads
⚡ Fast processing
📱 Mobile-friendly interface
Frequently Asked Questions
How does image compression work?
Image compression reduces file size by removing unnecessary metadata and optimizing the image data. Our tool uses lossy compression which slightly reduces quality in exchange for significantly smaller file sizes. You can control the quality level to balance size and visual fidelity.
What is the best quality setting?
For most use cases, 80-85% quality offers the best balance between file size and image quality. For web use, 70-80% is often sufficient. For print or professional work, use 90-95% quality.
Will compression reduce image quality?
Yes, compression uses lossy algorithms which slightly reduce quality. However, at quality levels above 80%, the difference is often imperceptible to the human eye. You can preview the compressed image before downloading.
What image formats are supported?
Our tool accepts PNG, JPG, JPEG, and GIF images. The output is optimized as JPG format which provides the best compression for photographs and complex images.
Is there a file size limit?
You can compress images up to 10MB. For larger files, consider using a desktop application or reducing image dimensions first.
Are my images uploaded to a server?
No! All image processing happens entirely in your browser. Your images never leave your device, ensuring complete privacy and security.
Can I compress multiple images at once?
Currently, you can compress one image at a time. For batch processing, compress each image individually and download them.