Konvizi
Free No upload
Drop your BMP files: they are converted to PNG on your device, in a few seconds.
Drop your BMP files here
or
Your files stay on your device
Konvizi’s “BMP to PNG” 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 BMP files into the area above or click “Choose files”. You can add several at once.
Each file is converted to PNG by your browser. Nothing is sent over the internet.
Download your PNG files one by one, or all together with “Download all”.
BMP is an old Windows image format that saves every pixel without compression. The quality is intact, but the files are huge.
A single photo in BMP can exceed 20 MB: too much for an email, and rarely accepted on the web.
PNG saves images with no loss of quality and supports transparency. It is the format of screenshots, logos and illustrations with crisp edges.
It is ideal when you want to keep every pixel intact, keep a transparent background, or edit the image later without degrading it.
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 maximum number of files: you can convert as many files as you like.
No. Everything happens in your browser, on your device. Your files are never sent over the internet: nobody but you can see them.
No. PNG is a lossless format: the image is saved exactly as it is displayed, transparency included. In return, the resulting file is often larger than the original.
Because BMP saves every pixel without compression. After conversion, the same image usually weighs ten to twenty times less, with no visible difference.
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.