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In-memory processing
Compress Image runs as JavaScript inside this tab.
Never uploaded
Safe for financials, contracts and NDAs.
No caps or sign-ups
File size is limited only by device memory.
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Compress images to meet upload limits, speed up websites and save storage. The tool re-encodes JPG, PNG and WebP files with a quality slider and optional resizing, keeping the original format.
Also known as Compress JPG and Compress PNG.
Photos usually shrink by 40 to 80 percent at 85 percent quality with no visible difference. Resizing large images to the size they are displayed at saves the most space.
Yes. Compress Image runs entirely inside your web browser using JavaScript, so the file never leaves your device. It is safe for confidential documents such as contracts, financial records and IDs.
There is no fixed limit, because the file is processed on your own device. Very large files depend on your device's available memory; a modern laptop or phone handles hundreds of megabytes.
Yes. ZapConvert runs in any modern browser, including Safari on iPhone and iPad and Chrome on Android, with nothing to install. You can add several files at once and download them together as a ZIP.