What ZIP 4 is — and how it works
ZIP 4 is a lightweight file converter built for speed and simplicity. You drop a file, choose an output, and download the result — with optional resizing and compression for images.
FAQ
Does ZIP 4 process files locally?
Yes. ZIP 4 runs client-side, meaning supported conversions happen locally in your browser.
Why are some formats disabled?
Browser support varies. ZIP 4 only enables formats your current browser can encode.
Does ZIP 4 store my files?
ZIP 4 is built with privacy in mind. For full details, see the privacy policy.
What ZIP 4 does
- Converts common file types to practical formats (especially images).
- Lets you resize images to a max resolution to reduce weight.
- Lets you compress lossy images with target-size presets when available.
- Generates downloadable outputs directly in your browser.
How it works
ZIP 4 runs client-side: your file is processed locally in the browser. For image conversion, it decodes the image, applies optional resizing, then encodes it into the selected format. For each file, ZIP 4 only shows the output formats that are compatible — and disables formats that your browser can’t encode yet.
Resizing and compression
Resizing reduces the maximum pixel size (useful for fast sharing and smaller files). Compression applies mainly to lossy image formats (like JPG/WEBP/AVIF), aiming for a smaller output.
- Resize: choose a max resolution (e.g. 1920 px).
- Target size: select a preset when offered for that file.
Privacy approach
ZIP 4 does not use analytics on this website and does not profile users. If you contact us through the contact form, your message is used only to deliver it and reply.