Compress Image Online
Last updated: August 2026
Reduce the file size of JPG, PNG, WebP or AVIF images in seconds — right in your browser. Upload or scan an image, choose a compression level, and ScanTo produces a smaller file locally on your device. Nothing is uploaded and no account is required.
Compression is useful for email attachments, web uploads, and forms with strict size limits. Balance quality against file size with the slider — photos usually compress well at 70–80% quality.
Frequently asked questions
Is the image compressor free?
Yes — compressing images is completely free with no login and no watermark.
How much can I compress an image?
Most photos shrink 50–80% with a modest quality drop. Try 70–80% quality first — text and graphics need higher values to stay sharp.
Which formats are supported?
JPG, PNG, WebP and AVIF in and out. SVG and GIF files are not processed by the compressor.
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Also free: Mind Map Online — create mind maps with no login.