Image Compressor
Compress images in bulk with quality control and before/after comparison.
Compression Settings
Mode:
About the Image Compressor
Compress and resize images in bulk with quality control, before/after preview, and ZIP download. Free, in-browser, no upload needed.
The Image Compressorruns entirely in your browser — your data is never uploaded to a server, so it stays private and works instantly, even offline. It's completely free, requires no sign-up, and works on desktop and mobile.
Frequently Asked Questions
- How do I compress images online for free?
- Use FW Smile DevToolsBox Image Compressor — drag and drop your images, adjust quality, and download compressed files. Everything runs in your browser so your images are never uploaded to a server.
- Can I compress multiple images at once?
- Yes. You can drag and drop multiple images or an entire folder. All images are compressed in bulk and can be downloaded as a ZIP file.
- Does image compression reduce quality?
- You control the quality slider (1–100). The before/after preview lets you compare results so you can find the best balance between file size and visual quality.