How to compress an image online
Upload your image by dragging it onto the tool or clicking "browse." Adjust the quality slider — 70-80% gives the best balance between file size and visual quality for most photos. Choose your output format (JPEG for photos, WebP for smallest size, PNG for transparency), then click "Compress Image" and download the result.
Why compress images?
- Faster websites — compressed images load quicker, improving your Google PageSpeed score and user experience
- Email attachments — most email providers limit attachments to 25 MB. Compression lets you send more photos
- Save storage — reduce photo library size on your phone or computer without deleting anything
- Social media — platforms like Instagram and Facebook re-compress your uploads. Pre-compressing gives you more control over quality
Which format should I choose?
JPEG is best for photographs — it offers good compression with minimal visible quality loss. WebP produces the smallest files (typically 25-35% smaller than JPEG) and is supported by all modern browsers. PNG is lossless and supports transparency, but creates larger files — use it for logos, screenshots, and graphics with text. For the best compression results, try converting to WebP.
Your image stays on your device
Safe File Tools uses the HTML5 Canvas API to process images entirely in your browser. Nothing is uploaded to any server. You can verify this by disconnecting from the internet — the tool still works. After compressing, you can also resize the image or change its DPI for print. For a complete walkthrough, read our guide on how to compress images for the web without losing quality.