Image Compressor
Compress images with quality slider, before/after preview, and batch mode. Set target file size with format tips. Free, no upload needed.
Compress Images — Reduce File Size Without Visible Quality Loss
The Image Compressor reduces the file size of your JPEG, PNG, and WebP images — with a quality slider that gives you full control. Compression runs entirely in your browser. No images are sent to any server.
How Does Image Compression Work?
For JPEG and WebP, compression is controlled via a quality slider (1–100). Lower values mean smaller files — but also more detail loss. For most use cases, a value between 70 and 85 delivers an excellent balance: barely visible difference with 50–70% size reduction. PNG compression is lossless and optimizes the internal data structure.
Optimize Email Attachments
Most email providers cap attachments at 25 MB (Gmail, Outlook). A single smartphone photo can be 5–15 MB. The compressor reduces file sizes to a fraction — multiple photos fit easily into one email.
Common Use Cases
- Shrink photos for email attachments
- Optimize images for websites and online shops (faster load times)
- Resize profile pictures and avatars
- Prepare social media uploads (Instagram, Facebook, LinkedIn)
- Compress product photos for marketplace listings
- Free up storage space on your device
JPEG vs. PNG vs. WebP
- JPEG — Ideal for photos. Lossy compression. Smallest file for photographic content.
- PNG — Ideal for screenshots and graphics with text or transparency. Lossless compression.
- WebP — Modern format by Google. 25–35% smaller than JPEG at equal quality. Ideal for websites.
Privacy
Your image never leaves your computer. All compression happens locally in your browser using the Canvas API. No upload, no server, no cloud.