BMP to PNG converter: free, fast and secure
Need to change an image from BMP to PNG? This tool does it instantly and for free, without uploading your pictures anywhere. BMP files are uncompressed and very heavy. PNG gives you the same picture at a fraction of the size. PNG is lossless and supports transparency, so it is ideal for logos, screenshots and images you will edit again.
Unlike most converters, ConvertKaro never uploads your images. The conversion happens on your own device, so it is quicker, there are no file limits, and your photos stay private.
How to convert BMP to PNG in 3 steps
- Add your BMP files. Tap “Select files” or drag and drop one or more .bmp images into the box above. You can also paste a screenshot with Ctrl+V.
- Adjust the options. The default settings work for most images, so you can skip this step.
- Download your PNG. Conversion starts instantly. Download each PNG file, or all of them at once as a ZIP.
Why use ConvertKaro BMP to PNG? Free, fast and secure
Many online tools upload your file to a remote server and make you wait. ConvertKaro is different.
100% Free
Use BMP to PNG completely free, every day. No credit card, no “pro” version and no daily cap on files.
Fast results
No waiting for uploads to finish. The work happens on your device the moment you add a file, which makes it noticeably faster than server-based tools.
Secure and private
Your files never leave your device. ConvertKaro does not upload, store or look at your documents and photos, which makes it safe for ID cards, bank statements and private pictures.
No signup, no watermark
You do not need to sign up or log in, and your output is clean, without any logo or branding.
Works on every device
Nothing to install: it runs in any modern browser on phones, tablets and computers.
Quality you control
The PNG output keeps the full resolution of your BMP, with high-quality resizing and correct colours.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
BMP vs PNG: what is the difference?
Before converting, it helps to know how the two formats compare.
| BMP | PNG | |
|---|---|---|
| Full name | Bitmap Image File | Portable Network Graphics |
| Type | Raster, uncompressed | Raster, lossless |
| Compression | None | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| File size | Very large | Large for photos, small for graphics |
| Support | Windows and most editors | Everywhere |
| Best for | Legacy Windows software, some printers and machines | Logos, screenshots, graphics with text, transparent images |
What is BMP?
BMP is the classic Windows bitmap format. It stores every pixel without compression, so the quality is perfect but the files are huge: a normal phone photo can become 10–30 MB. Today BMP is mostly used by older Windows programs, embroidery and printing machines, and some industrial software that expects raw pixel data.
What is PNG?
PNG is a lossless image format, so it keeps every pixel exactly as it is. It supports full transparency, which makes it the standard choice for logos, icons, screenshots and graphics with sharp text. Because nothing is thrown away, photos saved as PNG are usually much larger than the same photo as JPG or WEBP. PNG works in every browser, design tool and operating system.
When should you convert BMP to PNG?
- Logos and graphics with a transparent background
- Screenshots and images with text
- Images you plan to edit again in Photoshop, Canva or Figma
- Stickers and design assets
Tips for the best PNG results
- You can convert many BMP files at once. They are processed one after another and can be downloaded together as a ZIP.
- Keep your original BMP files until you have checked the converted PNG images.
How BMP to PNG keeps your photos and images private
When you add a file to BMP to PNG, it is opened with your browser’s own engine, processed in memory and offered back to you as a download. ConvertKaro never receives a copy. This is why the tool is fast even on 4G, why there is no daily limit, and why it is safe for confidential photos and images like ID proofs, bank documents, contracts and family photos.
Using BMP to PNG on your phone
On a phone, open this page in Chrome or Safari, tap the main button and pick files from your gallery, Files app or Google Drive. Results download straight to your phone, usually into the Downloads folder or Files app. You can also add this page to your home screen for one-tap access next time.
Who uses BMP to PNG?
You do not need any technical knowledge to use it. It is popular with:
- Students uploading photos and signatures to exam and admission forms
- Online sellers preparing product photos for Instagram, Meesho, Amazon and Shopify
- Office staff handling ID cards, scans and screenshots
- Bloggers and web designers who need fast-loading images
- Anyone sharing pictures on WhatsApp, email or social media
Supported input: JPG, JPEG, PNG, WEBP, HEIC/HEIF (iPhone), AVIF, GIF, BMP, TIFF and SVG.
Frequently asked questions
Will converting BMP to PNG reduce quality?
PNG stores the image lossless, so no extra quality is lost during conversion.
Does PNG keep transparency from BMP?
BMP images do not have transparent areas, so there is nothing to lose. PNG can hold transparency if you edit the image later.
Can I convert multiple BMP files to PNG at once?
Yes. Select or drop as many BMP images as you like. Each one is converted separately, and you can download them all together as a ZIP file.
Is BMP to PNG really free?
Yes, completely free. You can use it as many times as you want, and every option on the page is included at no cost.
Is it safe to use BMP to PNG online?
Yes. Your files are processed inside your own browser and are never uploaded to our servers, so nobody else can see them.
Does BMP to PNG work on mobile?
Yes, the tool is built mobile-first. Open this page on your phone, add your files and download the result directly.
Is there a file size limit in BMP to PNG?
There is no fixed limit set by us because files are not uploaded. Very large files depend on your device’s memory; most phones handle files of 100 MB or more without problems.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does BMP to PNG work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.