Shrink Images Without Uploading Them Anywhere
Every conventional "compress image online" site works the same way: your files travel to their server, get processed by unknown code, sit in a temporary folder — and you hope they are deleted. For screenshots with personal data, ID documents, or unreleased work, that is an unacceptable gamble.
This image compressor is different by design. Your browser reads each file, re-encodes it through the native canvas engine at your chosen quality, and writes the result straight back to your disk. There is no upload step because there is no server involved at all.
WebP output typically cuts photos by 60–75% and screenshots even further, while staying visually indistinguishable from the original — ideal for faster websites, email attachments, marketplace listings, and application forms with strict file-size caps.
How to compress images online free
- Drop your images onto the upload zone (or click it to browse) — files stay on your device the whole time.
- Choose the output format, and quality if the format is lossy.
- Each file re-encodes instantly through your browser's native engine — no waiting in server queues.
- Review the before/after size per file, then click Download to save the results.
Frequently Asked Questions
How much smaller will my images get?
Photos converted from JPEG to WebP at 80% quality usually shrink 60–75%. PNG screenshots become 80–95% smaller as JPEG/WebP. Already well-optimized files may shrink only slightly — the preview shows exact savings per file before you download.
Is compression lossless?
Choose PNG output for mathematically lossless results (best for graphics with text or transparency). WebP/JPEG outputs are visually lossless at high quality settings but technically discard imperceptible data — that is where the size savings come from.
Are my compressed images stored anywhere?
No. Processing uses your device's own canvas API; nothing touches the network. Close the tab and nothing remains except the downloads you saved.
Can I compress many images at once?
Yes — drop up to 20 files in one go. Each row shows before/after size so you can verify savings individually.