Compress Images
Without Losing Quality
Compress JPG, PNG, WebP, GIF, and more while keeping quality. Batch support — all processing happens privately in your browser.
Drag & drop images here or click to upload
JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, ICO, SVG — multiple files supported
What Is Image Compression?
Image compression reduces the file size of a picture so it takes less storage and loads faster, while trying to keep the image looking good. There are two main approaches: lossless compression (no visible quality loss, smaller gains in size) and lossy compression (some detail is discarded for much smaller files). Tools like ours let you choose a quality level so you balance size and appearance.
Our online image compressor runs entirely on your device. You add one or more images, pick a compression level (Low, Medium, High, or Custom) and optional output format, and the tool processes and re-encodes each image. Nothing is sent to a server — your files stay on your device, which keeps your content private and avoids upload limits.
Compressing images is useful for websites (faster loading), email (smaller attachments), social media (meeting size limits), and cloud storage (saving space). Batch compression lets you process many files at once with the same settings. You see before and after file sizes and a percentage saved, plus a visual before/after comparison so you can confirm quality before downloading.
You can use this tool on any device — Windows, Mac, Linux, or mobile — without installing software. There is no account required, no usage cap, and no watermark. You get quality presets, optional max dimensions, format options (same as input, JPEG, PNG, WebP), and a Download All option for batch results.
Discover Features
Batch compression, smart format detection, quality presets, before/after comparison, privacy-first, and cross-device support
Batch Compression
Upload and compress multiple images at once. Each file shows a thumbnail, original and compressed size, and savings percentage. Compress all with one click or process files individually.
Smart Format Detection
Supports JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, ICO, and SVG. The tool keeps transparency when needed (PNG/WebP) and uses the best output format based on your choice or the original image.
Quality Presets
Choose Low (quality 90) for minimal size reduction and maximum quality, Medium (70) for a balanced result, or High (40) for maximum compression. Use Custom to set any quality from 1 to 100.
Before/After Comparison
See original and compressed images side by side with a slider overlay. Compare visual quality and file sizes (original → new size with percentage saved in green) before downloading.
Privacy-First
All compression runs on your device. Nothing is uploaded to any server — your files never leave your device.
Cross-Device
Use the compressor on any device — Windows, Mac, Linux, or mobile — without installing software. Just open the page, add images, and compress.
How to Compress Images Online
Four simple steps — upload, set options, compress, compare and download
Upload Images
Drag and drop one or more images onto the upload area, or click to browse. Supported formats include JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, ICO, and SVG. Add multiple files for batch compression.
Set Compression & Format
Choose a compression level: Low, Medium, High, or Custom (with quality slider). Optionally set output format to Same as input, JPEG, PNG, or WebP. Enable max dimensions to resize large images.
Compress
Click Compress on a single file or Compress all to process every image. A progress bar shows status. Each result displays original size, new size, and percentage saved.
Compare & Download
Use the before/after slider to compare quality. Download each compressed file individually or use Download All to save every result. Summary shows total files and total savings.
Free vs Paid — Image Compressor
Get started free, upgrade when you need more power.
Unlock the Full Power of Image Compressor
Remove daily limits, process larger files up to 500 MB, enable batch processing, and get priority support.
Media & Image Tools includes:
- 7 image & media tools
- Unlimited daily uses
- 100 MB file size limit
- Batch processing
- All output formats
Also available in the All Tools Bundle
User Questions & Reviews
Real questions from users and expert answers from the OnlinePCTools team
“I have hundreds of product photos for my site. Can I compress them all at once and still keep them looking good?”
Priya Sharma
E-commerce Manager, Mumbai, India
Yes. Add all your images (drag and drop or select multiple), choose the Medium preset for a balanced result, then click Compress all. Each file is processed on your device with a progress indicator. You get original vs compressed size and percentage saved. Use the before/after slider to confirm quality, then Download All. Everything stays on your device.
— OnlinePCTools Team
“Do compressed images lose quality? I need sharp photos for my portfolio.”
Marcus Webb
Photographer, London, UK
Compression can reduce quality when you use lossy formats (JPEG/WebP) and lower quality settings. Use the Low preset (quality 90) for minimal size reduction and maximum quality — ideal for portfolios. You can also choose Custom and set 90–95. The before/after comparison lets you check sharpness before downloading.
— OnlinePCTools Team
“Are my images sent to your servers? I'm compressing confidential documents.”
Lisa Park
Legal Assistant, Seoul, South Korea
No. Compression happens entirely on your device. Nothing is uploaded to our or any third-party server. Close the tab and no copy remains. It is as private as using desktop software on your own computer.
— OnlinePCTools Team
“Can I force all images to WebP for my website even if they're PNG or JPEG?”
Alex Rivera
Front-End Developer, Mexico City, Mexico
Yes. After uploading, set Output format to WebP. Every image will be compressed and converted to WebP. Use the Medium or High preset to control file size. Images with transparency are encoded with alpha support in WebP. You can then download each file or use Download All.
— OnlinePCTools Team
Use Cases
Common scenarios where image compression saves space and speeds up loading
Website Optimization
Reduce image file sizes for faster page loads. Compress JPG and PNG assets while keeping visual quality, or convert to WebP for even smaller files and better performance.
Email Attachments
Shrink photos and screenshots so they fit within email size limits and load quickly for recipients. Use Medium or High compression for noticeable size reduction.
Social Media
Compress images before posting to stay under platform limits and speed up uploads. Batch compress a folder of photos and keep quality with the Low or Medium preset.
E-commerce
Reduce product image sizes for listings and galleries without losing clarity. Batch process and use the before/after slider to ensure thumbnails and full-size images look good.
Cloud Storage
Free up space by compressing photos and screenshots before backing them up. Keep originals elsewhere and use compressed copies for everyday access.
Mobile Apps
Prepare image assets at smaller file sizes for app store listings, in-app graphics, and thumbnails. Use max dimensions to cap width/height and reduce size further.
Frequently Asked Questions
Common queries about the Image Compressor tool
Q1. What image formats can I compress?
Q2. Will compression reduce image quality?
Q3. Are my images uploaded to a server?
Q4. Can I compress multiple files at once?
Q5. What does the max dimensions option do?
Q6. Why choose Same as input vs JPEG/PNG/WebP?
Q7. Is the tool free?
Q8. Can I use this on my phone?
Related Tools
Compress your images, then try these utility and viewer tools