Compress Image Online — Reduce File Size
Compress images online for free. Reduce file size without visible quality loss. Supports JPG, PNG, WebP.
Reduce image file size without visible quality loss — completely free, no signup required. PDFFlare compresses your images entirely in the browser, so nothing is uploaded to a server. Perfect for speeding up websites, shrinking email attachments, and preparing images for social media.
At 70–80% quality most viewers cannot tell the difference, yet file sizes drop by 50–70%. Want to change dimensions too? Combine compression with the resize tool, or switch formats using the image converter for even smaller files.
Drop your image here
JPG, PNG, or WebP up to 50 MB
How to Compress Images
Upload your image
Click the upload area or drag and drop an image file. JPG, PNG, and WebP formats are supported.
Adjust compression quality
Use the quality slider to set your desired compression level. Lower values mean smaller file size.
Download the compressed image
Click 'Compress Image' to process. Compare the before and after file sizes, then download your compressed image.
When Do You Need to Compress an Image?
Website performance. Large images are the number-one cause of slow page loads. Compressing hero images, product photos, and blog graphics can cut load times in half and improve your Core Web Vitals scores — directly boosting SEO rankings.
Email attachments. Most email providers limit attachment sizes to 25 MB. A handful of high-resolution photos can easily exceed that. Compress them first so your emails send successfully without bouncing back.
Social media uploads. Smaller files upload faster and display more quickly in feeds. Platforms like Instagram and Facebook re-compress your images anyway — starting with an optimized file gives you more control over the final quality.
Cloud storage optimization. If your Google Drive, Dropbox, or iCloud is running low on space, compressing photos and screenshots can free up significant storage without deleting anything.
Why Use PDFFlare to Compress Images?
100% Browser-Based
Your images never leave your computer. Everything runs in your browser using the Canvas API — no server uploads needed.
Before & After Comparison
See the original and compressed file sizes side by side so you know exactly how much space you saved.
Adjustable Quality
Fine-tune the quality slider from 10% to 100% to find the perfect balance between file size and visual quality.
No Signup Required
Start compressing immediately — no account, no email, no watermarks. Just drop your image and go.