Konvizi
Free No upload
Make your JPG, PNG and WebP photos lighter for email or upload, without changing their dimensions and without uploading anything.
Drop your JPG, PNG, WebP files here
or
Your files stay on your device
Konvizi’s “Compress image” tool is free, with no sign-up, no watermark and no file limit. All the processing happens in your browser, on your device: your files are never uploaded to a server, which makes it suitable for personal and confidential documents.
Drag your JPG, PNG or WebP files into the area above or click “Choose files”. You can add several.
“Recommended” is right almost every time. “Strong” saves more space at the cost of slightly lower quality. Click “Compress”.
The size before and after is shown for each image. Get them one by one, or all together with “Download all”.
A phone photo often weighs 3 to 8 MB: too much for a form limited to 1 or 2 MB, heavy for an email and slow to load on a website. Konvizi saves it again with stronger compression: JPG and WebP lose a little fine detail, almost invisibly, and PNG files are reduced to a palette of at most 256 colors, like specialized tools do. The dimensions stay the same; to reduce the size in pixels too, use “Resize image”.
These are the three most common image formats: JPG for photos, PNG for screenshots and logos (it supports transparency), WebP for websites. Each image keeps its format: a PNG stays a PNG, transparency included.
Your photos stay on your phone or computer: family pictures, photographed ID documents and screenshots are never sent online. The image is redrawn by your browser, so the output file does not carry the original’s EXIF metadata, including GPS location: handy before sharing a photo. And since nothing is uploaded, dozens of images convert in seconds.
Your files never leave your device. No upload, no storage.
No upload and no queue: the conversion starts right away.
As many files as you like, with no imposed size limit.
No sign-up, no watermark, no subscription.
| Konvizi | Typical online converter | |
|---|---|---|
| Where your files are processed | In your browser, on your device | On the service’s servers |
| Upload to the internet | None | Required, then you download the result |
| Storage of your files | None: nothing is stored | Stored on a server, at least while processing |
| Waiting time | Starts instantly | Upload time, sometimes a queue |
| Account | Never required | Often required beyond a few files |
| Watermark and limits | No watermark, no maximum number | Common on free plans |
Yes, completely. No sign-up, no watermark, no limit on the number of files.
No. Everything happens in your browser, on your device. Your files are never sent over the internet: nobody but you can see them.
A little, that is how compression works: at the “Recommended” level the difference is hard to see on screen. Dimensions and format stay the same (a JPG stays a JPG). Metadata such as the GPS location of a photo is removed along the way.
Because it is already well compressed: saving it again would not make it lighter. Konvizi tells you so and does not create a new file. To save more space, reduce its dimensions with “Resize image”.
Open your browser’s developer tools (F12 key), go to the “Network” tab and run a conversion: no request carries your file. The site also enforces a security rule (Content-Security-Policy) that forbids the browser from contacting any site other than konvizi.com, and konvizi.com is a static site with no service able to receive files.
Yes. Konvizi works in the browser of your phone or tablet (Safari, Chrome…) just like on a computer, with no app to install. Very large files are processed faster on a computer, which has more memory.