What happens when you convert BMP to TIFF
- The image is decoded and written as an uncompressed RGBA TIFF.
How to convert BMP to TIFF online
- Press "Choose BMP files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
- Adjust the settings if you need to. The output is lossless, so there is no quality setting to worry about.
- Press "Convert to TIFF". Images convert in a second or two each.
- Save each TIFF with its download button. Close the tab and every trace of the files is gone from memory.
Why convert BMP to TIFF?
BMP files usually come from Windows software, embedded displays and legacy tools. People convert them to TIFF because TIFF is the format printers, scanners and archives trust for lossless images.
In short, BMP is good at what it was made for, and TIFF is the more practical choice when the file has to open, upload or print somewhere else. BMP opens in browsers and every Windows image tool, while Safari shows TIFF; Chrome, Edge and Firefox download it instead of displaying it.
How to convert BMP to TIFF on Windows, Mac, iPhone and Android
On Windows
Open this page in Chrome, Edge or Firefox, drag your BMP files in from File Explorer, and press Convert. Each TIFF is saved to your Downloads folder. Paint can also re-save an image as TIFF with Save as, provided Windows can open the BMP in the first place.
On a Mac
Safari, Chrome and Firefox all work. Drag the BMP files from Finder onto the drop zone and the TIFF files land in Downloads. Preview can do single images too: open the file, choose File, then Export, and pick TIFF.
On iPhone and iPad
Open the page in Safari and tap Choose BMP files. You can pick from Photos or from the Files app. The converted TIFF appears in Files, in the Downloads folder; to put it in your photo library, open it there, tap Share and choose Save Image.
On Android
Open the page in Chrome, tap Choose BMP files and pick them from Files or your gallery. The TIFF is saved to the Download folder, where any file manager can find it.
Best settings for BMP to TIFF
The TIFF is written uncompressed with an alpha channel, four bytes per pixel, which every TIFF reader can open. A 12 megapixel image is about 48 MB. That is normal for print and archive work, where no loss is the point.
BMP vs TIFF: the differences
| BMP | TIFF | |
|---|---|---|
| Full name | Bitmap image | Tagged Image File Format |
| Type | image | image |
| Created by | Microsoft | Aldus Corporation |
| First released | 1990 | 1986 |
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes | Yes |
| Animation | No | No |
| Vector or raster | Raster | Raster |
| Colour | up to 32-bit colour | up to 32 bits per channel, including CMYK |
| In a browser | opens in browsers and every Windows image tool | Safari shows it; Chrome, Edge and Firefox download it instead of displaying it |
| Common uses | Windows software, embedded displays and legacy tools | print production, scanning, archiving and medical imaging |
| MIME type | image/bmp | image/tiff |
About BMP and TIFF files
What is a BMP file?
BMP usually stores pixels with no compression at all, so a 12 megapixel photo is about 36 MB. That size is the price of being readable by almost any program ever written for Windows.
What is a TIFF file?
TIFF is the format printers and archives trust because it can store uncompressed or losslessly compressed pixels, CMYK colour and several pages in one file. It is also why a single scan can run to 100 MB.
BMP to TIFF not working? Common problems
- Colours look slightly different. Browsers convert images to the standard sRGB colour space when they decode them, so wide-gamut and CMYK images can shift a little.
- A phone photo comes out upright even though it looked sideways elsewhere. That is correct: the rotation stored in the photo is applied during conversion, so the TIFF is always the right way up.
- The file is bigger than expected. It depends on the settings. At the defaults, the TIFF usually comes out close in size to the BMP; lower the quality for a smaller file.
Convert BMP to TIFF from the command line
If you work in a terminal, ImageMagick converts BMP to TIFF in one line:
magick input.bmp output.tiffTo convert every BMP in a folder at once, use magick mogrify -format tiff *.bmp. The converter on this page does the same job without installing anything.
BMP to TIFF converter FAQ
Will I lose quality converting BMP to TIFF?
No. TIFF is written losslessly, so the result matches the BMP exactly.
Why is the TIFF a different size from the BMP?
It depends on the settings. At the defaults, the TIFF usually comes out close in size to the BMP; lower the quality for a smaller file.
Are my BMP files uploaded anywhere?
No. The conversion runs inside this browser tab using your browser's own image decoder, so your files stay on your device. You can disconnect from the internet after the page has loaded and it still works.
Can I convert several BMP files to TIFF at once?
Yes. Select or drop as many files as you like; they are converted one after another and each gets its own download button.
How do I open a TIFF file?
Safari shows TIFF; Chrome, Edge and Firefox download it instead of displaying it. TIFF is common for print production, scanning, archiving and medical imaging.
Is this BMP to TIFF converter free?
Yes. There is no sign-up, no watermark and no limit on how many files you convert. The site is paid for by advertising, and because conversions run on your device there is no server cost per file.
Can I convert BMP to TIFF on my phone?
Yes. The converter works in Safari on iPhone and iPad and in Chrome on Android. Converted files are saved to the Downloads folder.