Convert BMP to PNG Online — For Lossless Compression
50–70% smaller than BMP with lossless quality. Ideal for web and modern workflows.
Drop up to 50 BMP files at once — no install, no sign-up required.
Drop BMP Files Here
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How it works
- 1 · Drop your files
Drag & drop or choose BMP/DIB files. No account required on Free—paid plans unlock bigger batches, higher limits, and priority queues.
- 2 · We convert securely
Processed on our dedicated servers. Encrypted in transit & at rest. Metadata stripped by default. We never store filenames—only file types & sizes for accounting. We never train AI models on uploads.
- 3 · Download & auto-delete
Grab your PNGs in seconds. Files delete automatically after 1 hour. Delete anytime after downloading with one click.
BMP (Bitmap Image File) is Microsoft's native raster graphics format, typically storing uncompressed pixel data in BGR color order. Introduced with Windows 1.0 in 1985, BMP files are straightforward—essentially raw pixel arrays with minimal metadata—but extremely large compared to compressed formats. While BMP supports optional RLE compression, most implementations store pixels uncompressed for simplicity and compatibility.
Learn more: BMP on Wikipedia
BMP is primarily encountered in legacy Windows applications and embedded systems where simplicity matters more than file size. For modern use, PNG offers lossless compression with universal compatibility at a fraction of the file size.
PNG (Portable Network Graphics) provides lossless compression with full alpha channel transparency, making it the go-to format for graphics, screenshots, and images requiring pixel-perfect fidelity. Created in 1996 as a patent-free GIF alternative, PNG uses DEFLATE compression and supports both indexed color (PNG-8) and truecolor with alpha (PNG-24/32). Files are 3-10× larger than equivalent JPEGs but preserve every pixel exactly.
Learn more: PNG on Wikipedia
PNG is universally supported and ideal for logos, UI elements, diagrams, and any content where transparency or lossless editing matters. For photographic content without transparency needs, JPEG typically offers better compression efficiency.
Frequently Asked Questions
Why are BMP files so massive?
How much smaller will my files be?
Does PNG preserve transparency from BMP v4/v5 files?
Will I lose any quality?
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 25 MB | 50 files | 3 at once |
| Pro | 200 MB | 200 files | 6 at once |
| Business | 1024 MB | 1000 files | 10 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all images converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 1 credit per 25 MB
How it works:
- Files up to 25 MB: 1 credit (minimum)
- 26-50 MB: 2 credits
- 51-75 MB: 3 credits
- 76-100 MB: 4 credits
- Over 1000 MB: 40 credits (maximum cap)
Example: A 5 MB image = 1 credit. A 95 MB image = 4 credits.
Why per-megabyte? Larger files require more resources (processing, bandwidth, storage).
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Daily Limit | Monthly Limit |
|---|---|---|
| Free | 50 credits/day | — |
| Pro | — | 10,000 credits/month |
| Business | — | 30,000 credits/month |
Daily credits (Free tier, including guests) reset every day at midnight UTC. Monthly credits (Pro & Business) reset on your billing cycle date.
Note: With 1 credit per 25 MB, images under 25 MB cost 1 credit each. Pro users can convert 10,000 images per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why are conversions so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I process files in bulk?
- Why did my file fail to convert?
- Do you use my files to train AI?
Choose Your Plan
Limits shown for BMP to PNG conversion. One subscription unlocks the entire Tools.FAST Network. Plans cover Convert.FAST, Compress.FAST, PDF.FAST (soon), and all future tools.
Free
For occasional personal use
- 25 MB per file
- 50 files per batch
- 3 parallel conversions
- 50 credits/day
- Standard priority
- Email support
No sign-up required. Create an account for your own credit pool.
Pro
For independent work
- 200 MB per file
- 200 files per batch
- 6 parallel conversions
- 10,000 credits/month across Tools.FAST
- High priority
- Email & chat support
- One subscription for the entire Tools.FAST network
Business
For production scale
- 1 GB per file
- 1000 files per batch
- 10 parallel conversions
- 30,000 credits/month across Tools.FAST
- Add seats to invite team members
- Highest priority
- Priority email & chat support
- One subscription for the entire Tools.FAST network
How Credits Work
- Usually 1 credit per conversion. Exact cost shown before you start.
- Credits refresh monthly on your billing cycle.
- Unused credits roll over, capped at your plan's monthly amount.
- One subscription, all sites. Works across Convert.FAST, Compress.FAST, and future tools.
What's New in BMP to PNG
Latest improvements to this converter
Initial launch of BMP to PNG converter with lossless compression and full transparency preservation.