Image Compressor — Free Online JPG, PNG & WebP Compression
Reduce file size without changing format — adjust quality, see before-and-after size comparison in real time. Batch processing, no upload, no watermark.
Image compression reduces file size by lowering quality or re-encoding the data. It is commonly used to speed up page loads, save storage, or meet upload size limits. JPG, WebP, and AVIF compress significantly; lossless formats like PNG have limited size reduction. Compression runs entirely in your browser — no upload required.
When Do You Need to Compress Images
Speed Up Web Pages
Smaller images mean faster page loads and lower bandwidth usage.
Meet Upload Limits
Email, forms, and platforms often cap file size — compress first, then upload.
Save Storage Space
Batch-compress photo libraries or asset folders to free up disk and cloud storage.
Compression Trade-offs
- Noticeably smaller files — faster loading and less storage
- Keeps the original format — no need to rename the extension
- Batch support — compress multiple images at once and download as a zip
- Lossy formats lose quality the harder you compress; the default quality of 70 is a safe balance
- Lossless formats like PNG have limited compression gains
- Already heavily compressed images yield little additional size reduction
Related Tools & Further Reading
Image Compression FAQ
No. Compression keeps the original format (JPG stays JPG, PNG stays PNG) and only reduces the file size. Use the converter if you need to change format.
PNG is a lossless format, so there is limited room to optimize through re-encoding. For significant size reduction, consider converting to JPG or WebP.
Lossy formats (JPG / WebP / AVIF) do lose some quality when compressed. The default quality of 70 strikes a good balance between size and quality — you can adjust it manually.
No. Compression runs entirely in your browser. Your images are never uploaded, stored, or transmitted.