How to Change BMP to PNG on iPhone
BMP is an old, uncompressed Windows bitmap format. Add your BMP file to the box below and it turns into a PNG instantly, on your own iPhone, without anything being uploaded.
Drop BMP files here or browse
Accepts HEIC, WebP, PNG, JPG, BMP, GIF and SVG · multiple files · nothing is uploaded
Converted on your device. Your photos never leave your browser.
The steps: Change BMP to PNG on iPhone
- 1
Open this page in Safari (or Chrome) on your iPhone or iPad.
- 2
Tap the box above, then choose Photo Library to pick from Photos, or Choose File to browse the Files app (iCloud Drive, On My iPhone, Downloads).
- 3
Your PNG is ready the moment the file is added.
- 4
Tap Download. Safari puts the file in Files › Downloads (the download arrow in the address bar takes you there). To get an image into Photos, open it in Files, tap Share, then Save Image.
What happens to your image going from BMP to PNG
- Because BMP is uncompressed, the PNG usually ends up a small fraction of the size.
BMP vs PNG in brief
- BMP is an old, uncompressed Windows bitmap format. The files are huge for the number of pixels they hold, and most websites, phones and messaging apps won't accept them.
- PNG is lossless, meaning every pixel is stored exactly, and it supports full transparency. That suits screenshots, logos and graphics perfectly, but a photo saved as PNG is often several times larger than the same shot as a JPG.
iPhone tips
- You don't need anything from the App Store – the tool works inside Safari and the file stays on your iPhone.
BMP vs PNG
| BMP | PNG | |
|---|---|---|
| Compression | Normally none | Lossless |
| Transparency | Seldom supported | Yes, with a full alpha channel |
| Animation | No | No (editors rarely support APNG) |
| Ideal for | Old Windows programs | Screenshots, logos and graphics with text or see-through areas |
| Works on | Windows; patchy elsewhere | Everywhere |
Questions & answers
Does changing BMP to PNG lower the quality?
No more quality is lost, because PNG is lossless. Your PNG matches the BMP exactly.
Can I do a whole batch of BMP files?
Yes. Add as many as you want; each is converted separately, and Download all bundles them into a single ZIP.
Do my photos get sent anywhere?
No. Your browser does the conversion with your device's own processor, so your photos stay with you. Once the page has loaded you could even switch off your internet connection.
Where do I find the converted file on my iPhone?
Tap Download. Safari puts the file in Files › Downloads (the download arrow in the address bar takes you there). To get an image into Photos, open it in Files, tap Share, then Save Image.
Need more options? Open the full Image Converter tool →