You've got images that are too large — they won't upload to a website, they're slow to load, or they fill up your storage. Compressing images makes them smaller without losing noticeable quality.
Why compress images?
- Faster loading: Smaller images load faster on websites.
- Save storage: Compressed images take up less space.
- Email attachments: Send images without exceeding attachment limits.
- Better performance: Faster uploads and downloads.
How to compress images
- Open PDFly's Image Compressor tool.
- Upload your images — JPG, PNG, or WebP.
- Choose your quality setting — higher quality means larger files.
- Click process and download your compressed images as a ZIP.
Image formats explained
- JPG: Best for photos. Compresses well with minor quality loss.
- PNG: Best for graphics and text. Lossless but larger files.
- WebP: Modern format with good compression and quality.
Need to shrink image files?
Compress images in seconds — no uploads, no signup.
Open Image Compressor Tool常见问题
Does compression reduce image quality?
Some — but a good compressor balances file size and quality. You can adjust the level.
Can I compress multiple images at once?
可以——上传多张图片并以 ZIP 形式下载。
What's the best format for compression?
JPG for photos, PNG for graphics, WebP for modern web use.