ImagePress is a free, browser-based image compressor and converter. It shrinks image files so your pages load faster, your emails send quicker, and your uploads fit their limits.
Everything runs locally on your device using WebAssembly — your images never touch a server. Drop in a file, pick your format and quality, and download the result.
Popular tools
Guides & comparisons
- WebP vs PNG: Which Image Format Should You Use?
- AVIF vs JPEG: The 2026 Guide
- JPEG XL vs AVIF vs WebP
- How to Convert Images to WebP
- Image Compression for Web Performance: A Complete Guide
- Best Image Formats for the Web in 2026
- How to Compress Images Without Uploading Them to a Server
Why use ImagePress?
100% private
Your images are processed on your own device. Nothing is uploaded, so nothing can be stored, analyzed, or leaked.
Free, forever
No accounts, no sign-ups, no watermarks, no file limits. The compression is done by free open-source codecs.
All the modern formats
WebP, AVIF, JPEG, PNG, and more. Convert between formats or fine-tune quality until the size is right.
Fast and reliable
No waiting for uploads and downloads. Compression starts instantly and happens right on your machine.
How it works
Pick an image
Choose a file from your device or drag and drop it into the box.
Adjust quality
Compare the original and the compressed result side by side. Drag the quality slider to balance size and quality.
Download
Save your smaller image and use it anywhere — websites, emails, apps, or chats.
Frequently asked questions
Are my images uploaded anywhere?
No. ImagePress compresses every image entirely in your browser using WebAssembly codecs. You can verify this by opening your browser’s network tools — no upload request ever fires.
Is ImagePress really free?
Yes — no accounts, no watermarks, and no limits. The compression engines are open-source codecs that run on your own device.
Which formats can I convert between?
WebP, AVIF, JPEG, PNG, and more. For common jobs, use the dedicated tools on this page, like PNG to WebP or JPG to AVIF.
Ready to compress your first image?
Convert or shrink an image in seconds — right in your browser.
Open the compressor