Image converter
Convert BMP to PNG
Private format conversion with optional resizing, compression, and adjustments. Your files never leave this browser.
Drag & drop images here, or click to browse
PNG, JPG, WEBP, HEIC, AVIF, BMP, GIF, TIFF — up to 25MB each (max 20 files)
About converting BMP to PNG
Convert BMP to PNG for lossless compression with transparency support. PNG is the standard for web graphics and it shrinks raw bitmap data substantially while keeping every pixel identical — the first step when rescuing images from legacy Windows software.
BMP is one of the oldest Windows image formats, dating to the early days of Microsoft Windows. It stores pixels with essentially no compression. PNG is a lossless raster format released in 1996 as a patent-free replacement for GIF. It became the default format for graphics on the web whenever exact pixel fidelity matters.
Both formats share the same compression philosophy, so the conversion is mainly about compatibility and file size rather than a change in image quality behaviour.
When to use BMP vs PNG
Choose PNG when logos, icons, screenshots, line art, memes, illustrations with text, and any image that will be edited and re-exported multiple times. Keep BMP when legacy Windows applications, pixel-art editing, machine-vision pipelines, raw texture data, and software that predates modern formats.
On strengths: BMP brings zero decoding complexity, bit-exact fidelity, and acceptance by legacy industrial, scientific, and manufacturing software that refuses compressed formats. PNG brings crisp edges on text and logos, transparent backgrounds, unlimited re-saving without quality loss, and near-universal support in browsers, editors, and operating systems.
The trade-off: Extremely large files — a single screen-sized BMP can be several megabytes — plus weak transparency support and poor handling of photographic content. Photographs stored as PNG are usually much larger than the same photo as JPEG, WEBP, or AVIF, because lossless compression cannot shrink detailed imagery efficiently.
How to convert BMP to PNG
The converter runs entirely in this browser tab — there is no upload, no account, and no file-size harvesting. Follow these steps:
- Drop your BMP files onto the converter above, or click the drop zone to browse. Up to 20 files can queue at once, each up to 25 MB.
- The output defaults to PNG. Adjust the quality slider if the format is lossy, or resize/crop first if you also want to change dimensions.
- Press Convert. Decoding and encoding happen in browser memory using Canvas — your pixels never leave the device.
- Preview the result, then download it individually or grab the whole batch as a ZIP.
About BMP — Bitmap picture
BMP is one of the oldest Windows image formats, dating to the early days of Microsoft Windows. It stores pixels with essentially no compression.
Typical uses: Legacy Windows applications, pixel-art editing, machine-vision pipelines, raw texture data, and software that predates modern formats.
About PNG — Portable Network Graphics
PNG is a lossless raster format released in 1996 as a patent-free replacement for GIF. It became the default format for graphics on the web whenever exact pixel fidelity matters.
Typical uses: Logos, icons, screenshots, line art, memes, illustrations with text, and any image that will be edited and re-exported multiple times.
Tips for a clean BMP → PNG conversion
- Work from the highest-quality BMP source you have. Converting from an already-compressed copy stacks compression artifacts on top of each other.
- You can re-export PNG as many times as needed without losing data — ideal if the file will be edited repeatedly.
- Batch similar images together — files with comparable dimensions convert in the same pass, which keeps the workflow fast.
- Keep the original file. Even lossless conversions can subtly change color profiles, and the source is your safety net.
Frequently asked questions
Is this BMP to PNG converter free?+
Yes. All image conversions are completely free with no sign-up, no watermarks, and unlimited usage.
Are my images uploaded to a server?+
No. All conversion happens locally in your browser via the HTML5 Canvas API. Your files are never uploaded or stored anywhere.
Will converting BMP to PNG reduce quality?+
PNG is a lossless format, so the converted file stores every decoded pixel exactly — quality does not degrade during conversion, and you can re-save it repeatedly without generational loss.
Can I convert multiple BMP files at once?+
Yes — drop up to 20 files into the converter and they will all be processed in a single batch. Each file can be up to 25 MB. The batch downloads as a ZIP, or you can save results individually from the preview.
Does this converter work on phones and tablets?+
Yes. The converter is a responsive web app that runs in any modern mobile browser — iOS Safari, Chrome for Android, and others. Files are processed on-device, so mobile uploads are not sent anywhere and the connection speed does not affect conversion time.