Image Compressor — Reduce JPEG, PNG & WebP Size Free
Compress photos and images instantly in your browser. Adjust quality, choose output format, resize dimensions — then download the compressed files. Supports batch processing. Nothing is uploaded.
PNG is always lossless
Resize longest side proportionally
How Image Compression Works
This tool uses the browser's built-in Canvas API to redraw your image at the chosen quality level and dimensions. For JPEG and WebP, reducing quality from 100% to 75% typically cuts file size by 50–70% with minimal perceptible difference at screen viewing distances.
PNG compression is lossless — the Canvas API encodes PNGs without quality loss. To reduce PNG size, scale down dimensions using the Max Dimension slider, or switch to WebP format which achieves 25–35% smaller files than PNG at equivalent quality.
Choosing the Right Output Format
JPEG
Best for photographs and images with smooth gradients. Wide compatibility with all devices, apps, and email clients. Does not support transparency.
WebP
Google's modern format produces smaller files than both JPEG and PNG. Supports transparency and both lossy and lossless modes. Supported by all modern browsers. Ideal for web images.
PNG
Lossless compression — no quality degradation. Best for screenshots, logos, diagrams, and images with transparent backgrounds. Larger than JPEG/WebP for photographs.
Common Use Cases
Uploading Profile Photos and KYC Documents
Many apps and government portals cap image uploads at 200KB or 1MB. Compress your photos before uploading to avoid rejection errors.
Optimizing Images for Websites and Blogs
Large images are the most common cause of slow page load times. Compress and resize photos before uploading to WordPress, Ghost, or any CMS to improve Core Web Vitals scores.
Sending Photos via WhatsApp or Email
Full-resolution photos from modern smartphones can be 5–15MB each. Compress them to under 500KB for faster sharing without noticeable quality loss on mobile screens.
Frequently Asked Questions
What image formats are supported?
JPEG, PNG, WebP, and GIF are supported for upload. You can output as JPEG, WebP, or PNG regardless of the input format. Converting to WebP typically produces the smallest files.
What does the quality slider do?
For JPEG and WebP, the quality slider controls how much detail is sacrificed for smaller file size. At 75–85%, images are visually indistinguishable from the original for most photos. PNG is always lossless — the slider has no effect on PNG output.
Will the compressed image be uploaded to a server?
No. All compression is done using the browser's Canvas API. Your images never leave your device.
Can I compress multiple images at once?
Yes. You can drag multiple images or select them from the file picker. Each image is compressed independently using your chosen settings. Download them individually or all at once.
What does the Max Dimension setting do?
It resizes the image so the longest side is no larger than the value you set. For example, setting 1200px resizes a 3000×2000 image to 1200×800 while preserving aspect ratio. Set it to 0 to keep the original dimensions.
Why is my PNG not getting smaller?
PNG uses lossless compression, so quality settings do not apply. The file size depends on the pixel dimensions. Use the Max Dimension slider to reduce PNG file size, or switch the output format to WebP or JPEG for lossy but much smaller files.