BMP to PSD Converter
Convert BMP to PSD in your browser. BMP files usually come from Windows Paint, legacy Windows programs, embedded displays and some scanners; PSD is the better fit for editing in Photoshop. You get an 8-bit RGB Photoshop document with one layer and a merged composite, RLE compressed, with transparency kept. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
BMP expected · other image formats also work
How to use BMP to PSD
- 1
Add your BMP files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the PSD is written losslessly. Resizing and rotating are under More options if you need them.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .psd files one at a time or together as a ZIP.
Why use Aback Images for bmp to psd
Where the PSD goes next
PSD opens in Photoshop, Affinity Photo, GIMP, Photopea and Krita.
PSD next to BMP
Both sides are lossless, so the size depends on how well the PSD encoder handles this picture compared with the BMP's usually none; RLE for some 4 and 8-bit files.
Written without a lossy pass
The PSD is written losslessly, so the pixels decoded from the BMP arrive unchanged.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
BMP vs PSD
What changes from BMP to PSD
Encoding: the BMP uses usually none; RLE for some 4 and 8-bit files; PSD uses raw or RLE (PackBits) channel data, ZIP in some 16 and 32-bit files, and the download is an 8-bit RGB Photoshop document with one layer and a merged composite, RLE compressed, with transparency kept.
Bit depth: 1, 4, 8, 16, 24 or 32 bits per pixel in the BMP; PSD allows 8, 16 or 32 bits per channel, and the PSD written here has 8 bits per channel.
Colour: RGB or an indexed palette in the BMP; PSD supports RGB, CMYK, Lab, greyscale, indexed or multichannel, written here as 8-bit sRGB.
Transparency: the BMP stores it as an optional fourth byte in 32-bit files, which many programs ignore; the PSD keeps it as transparent layers plus extra alpha channels.
Metadata: the BMP can carry nothing beyond the header's resolution fields (and a colour profile in rare V5 headers); PSD can carry XMP, EXIF, IPTC and ICC in image resource blocks, but nothing is copied across.
About BMP
BMP stores raw, uncompressed pixels. Files are huge but trivially simple, which is why some legacy Windows software, embedded displays and printers still ask for it.
A BMP is a 14-byte file header ('BM' and the offset to the pixels), a DIB header (40 bytes, or 108 and 124 bytes in the V4 and V5 versions that add colour masks and alpha), an optional palette, then pixel rows padded to 4 bytes and normally stored bottom-up.
BMP files usually come from Windows Paint, legacy Windows programs, embedded displays and some scanners.
About PSD
PSD is Adobe Photoshop's layered working format. It keeps layers, masks and effects, but almost nothing outside Photoshop can display it, so finished designs are exported to PNG or JPG.
A PSD has five sections: a header ('8BPS', channel count, size, depth, colour mode), colour mode data, image resources (thumbnail, ICC, XMP, resolution), layer and mask information, and finally the merged composite image that the Maximize Compatibility option saves.
When converting BMP to PSD makes sense
PSD is the better choice for editing in Photoshop, while BMP suits legacy software and embedded systems that require it.
PSD strengths: Keeps every layer and edit. Drawbacks to weigh: Huge files; Cannot be viewed on the web or most phones.
Limitations
- BMP stores nearly every pixel literally, so almost any compressed target is several times smaller.
- A 32-bit BMP can carry an alpha byte that most programs ignore; if the image suddenly gains transparent areas after converting, that byte was set.
- The Photoshop document holds the picture as a single layer: a starting point for editing, not a reconstruction of layers.
- Photoshop, Affinity Photo, GIMP and Photopea open it.
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Frequently asked questions
Does converting BMP to PSD lose quality?
PSD is written losslessly, so the pixels are stored exactly as decoded.
Is transparency kept in the PSD?
Yes. BMP stores it as an optional fourth byte in 32-bit files, which many programs ignore, and the PSD is written with an alpha channel, so transparent areas stay transparent.
Which apps open PSD files?
Photoshop, Affinity Photo, GIMP, Photopea and Krita. It does not open in web browsers.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.