Compress an image without uploading it — 100% private
Updated: May 2026
Compress photos without uploading them to a server. Local browser compression means no data is transmitted, ideal for sensitive photos and documents.
Apply this directly in the main browser-based tool.
Open the Image Compressor →What this page helps you do
Use this page for private photos, identity documents, medical files and any image you do not want to send to a remote server.
- Process files locally in the browser.
- Keep an original copy if you may need to edit the image later.
- Compare the result before publishing or uploading it.
Recommended settings
Choose WebP or JPEG around 75-85%, or use target size mode when a form imposes a strict limit.
How to do it with Flowfiles
- Add the image to Flowfiles.
- Choose the output format.
- Adjust quality, target size or resizing.
- Click Compress.
- Download the optimized file.
Frequently asked questions
Are my images uploaded?
No. Flowfiles processes images locally in your browser.
Can I process multiple images?
Yes. Add several files and download the results as a ZIP archive.
Which format should I choose?
WebP is best for many web uses, JPEG is safest for compatibility, and PNG is best for transparency.