What will I receive?
BMP to PNG
PNG stores the decoded image without additional lossy compression and can preserve compatible transparency. It may be larger and cannot restore detail or transparency absent from the source.
Convert BMP to PNG online
Convert legacy BMP bitmaps and captures to PNG for a newer workflow.
Automatic deletion
InputBMPOutputPNG
Step 1 of 3 · Files
Expires in 24 h- Files
- Format
- Result
Select BMP files
From your phone, computer, or drag them here. BMP · 50.0 MB per file · up to 5
The listed formats are accepted. Each file's structure is validated before conversion.
Conversion limits
What limits apply?
Up to 5 files, 50 MB each. Encrypted files, animations and unsafe content are not accepted. Structural validation may reject a conversion.
Input and output expire automatically after the period shown in the converter. Download your result before then.
Practical guide
Convert BMP to PNG without photographic compression
PNG makes a widely compatible copy of a legacy BMP without adding lossy compression. It can retain compatible alpha but does not always reduce size or add detail.
Retain dimensions
Output keeps size unless settings change it. PNG represents decoded pixels but does not replace a BMP master.
Use PNG for type and lines
Screenshots and diagrams avoid JPG artefacts, although source defects remain.
Check actual transparency
PNG retains compatible BMP alpha; an opaque BMP does not gain transparency.
Measure the result
PNG may remain large. Choose a lossy output only when the destination permits it.
For a light opaque copy compare BMP to JPG; for adjustable web output use BMP to WEBP.
Frequently asked questions
Does PNG lose BMP quality?
It adds no photographic loss but cannot improve the decoded source.
Does transparency appear automatically?
No. Only a compatible alpha channel already in BMP is retained.
Is PNG always smaller?
No. Measure the output before replacing BMP.