Image Compressor Online - Compress Images Free
Compress JPG and PNG images online for free. Choose a quality preset or use a custom slider. Shows before/after file size and compression ratio. Runs entirely in your browser.
Click to select a image, or drag and drop
Your file never leaves your browserQuality Preset
Quality: 60%
How to Compress an Image Online
- Upload a JPG or PNG image.
- Choose a quality preset (Low, Medium, High) or drag the slider to fine-tune.
- Click Compress & Download — you'll see the before/after file sizes and the percentage saved.
Example
A 4 MB camera photo set to Medium quality (60%) compresses to roughly 400 KB — a 90% reduction — while remaining visually crisp for web use.
Common Use Cases
- Reducing file sizes before uploading to websites or social media.
- Making email attachments smaller without noticeable quality loss.
- Optimizing product images for faster e-commerce page loading.
FAQ
- What quality level should I use? Medium (60%) is a good default — it saves ~80% of file size with minimal visible change. Use High (85%) for images where every detail matters, and Low (30%) when smallest size is the priority.
- Does this support PNG? PNG uses lossless compression, so the quality slider has less effect. For PNGs, the tool still reduces the output size by re-encoding.
- Is my image uploaded anywhere? No — compression happens entirely in your browser using the canvas API.